АДСОРБЕНТ НА ОСНОВЕ ЦЕОЛИТА И ГЛИНЫ С ВЫСОКИМ СОДЕРЖАНИЕМ КРЕМНЕЗЕМА И СПОСОБ ОЧИСТКИ УГЛЕВОДОРОДНОГО СЫРЬЯ, СОДЕРЖАЩЕГО НЕНАСЫЩЕННЫЕ МОЛЕКУЛЫ

Изобретение относится к цеолитным адсорбентам. Предложен адсорбент для очистки углеводородного сырья. Адсорбент содержит цеолит типа NaX и связующее, содержащее глину с величиной массового отношения Si/Al, превышающей 2, причем связующее содержит глину типа монтмориллонит. Предложен также способ получения и использования адсорбента в способе очистки углеводородного сырья, содержащего ненасыщенные молекулы и по меньшей мере одну примесь, содержащую по меньшей мере один гетероатом типа О, S и N. Изобретение обеспечивает получение адсорбента с пониженной реакционной способностью в отношении ненасыщенных молекул. 3 н. и 5 з.п. ф-лы, 2 табл.

НОВЫЕ ТВЕРДЫЕ МАТЕРИАЛЫ И СПОСОБ УДАЛЕНИЯ СОИЗ ПОТОКА ГАЗА

Изобретение касается способа и системы для удаления диоксида углерода из технологического газа, образующегося во время сгорания топлива, способа получения сорбента. Способ и система для удаления диоксида углерода из технологического газа, образующегося во время сгорания топлива, где упомянутая система содержит, по меньшей мере, один поглотительный резервуар, через который может проходить технологический газ, где упомянутый поглотительный резервуар снабжен сорбентом, который способен обратимо улавливать диоксид углерода из технологического газа, проходящего через сорбент, где упомянутый сорбент содержит, по меньшей мере, один амин, по меньшей мере, один катализатор активации диоксида углерода и, по меньшей мере, один пористый материал, несущий, по меньшей мере, один катализатор и, по меньшей мере, один амин, где пористый материал находится в виде слоя сорбента на подложке, образующей, по меньшей мере, часть из, по меньшей мере, одного канала, которая способна принимать, по меньшей мере, ...

КАТАЛИТИЧЕСКИЙ СОРБЕНТ ДЛЯ ОЧИСТКИ ВОДНЫХ СРЕД

Изобретение относится к очистке природных и сточных вод и может быть использовано на водозаборах, промышленных предприятиях и в индивидуальных системах очистки питьевой воды. Предложен состав сорбента, который содержит носители в виде природного цеолита клиноптилолитового ряда, вулканической пемзы и минерала манганита с содержанием марганца не менее 50%. В качестве активного каталитического компонента сорбент содержит диоксид марганца на упомянутых носителях. Изобретение обеспечивает повышение степени очистки воды от ионов железа и марганца. 1 табл.

ЦЕОЛИТ ТИПА X, СПОСОБ ПОЛУЧЕНИЯ ЛИТИЙ- И ТРЕХВАЛЕНТНОГО ИОНООБМЕННОГО ЦЕОЛИТА ТИПА X (ВАРИАНТЫ) И СПОСОБ ОТДЕЛЕНИЯ АЗОТА ОТ СМЕСИ ГАЗОВ

Цеолиты типа X, катионы которого компенсирующие заряд, содержат от приблизительно 95 до 50% ионов лития, от 4 до 50% одного или более алюминия, церия, лантана и смеси лантаноидов и от 0 до 15% других ионов. Цеолиты предпочтительно адсорбируют азот из смесей газов. Предложены варианты двухстадийного способа ионообменного получения цеолита. Способ позволяет эффективно выделять азот на цеолитах с повышенной термостабильностью. 5 с. и 18 з.п. ф-лы, 9 табл.

АДСОРБЕНТ МЕТИЛЙОДИДА, ЕГО ПРИМЕНЕНИЕ И СПОСОБ АДСОРБЦИИ МЕТИЛЙОДИДА

... 1. Адсорбент метилйодида, который содержит цеолит, содержащий по меньшей мере один металл, адсорбирующий йодид, или его соединение, причем цеолит представляет собой гидрофобный цеолит, выбранный из группы, состоящей из AFI, AEL, ВЕА, СНА, EUO, FER, KFI, LTL, MAZ, MOR, MTW, OFF и TON.2. Адсорбент по п. 1,в котором цеолит представляет собой по существу гидрофобный цеолит, и/илив котором металл, адсорбирующий йодид, представляет собой также металл, адсорбирующий йод.3. Адсорбент по п. 1,в котором цеолит является микропористым, и/илив котором металл, адсорбирующий йодид, выбран из серебра, иттрия, церия, магния, натрия, олова и свинца.4. Адсорбент по п. 1,в котором цеолит или адсорбент имеет долю микропор более 70%, предпочтительно более 80%, по отношению к общему объему пор цеолита или адсорбента, и/илив котором металл, адсорбирующий йодид, расположен в порах цеолита.5. Адсорбент по п. 1,в котором цеолит представляет собой алюмосиликат, и/илив котором цеолит имеет соотношение SiO/AlO>10, предпочтительно ...

ПАССИВНЫЙ АДСОРБЕНТ NOx, СОДЕРЖАЩИЙ БЛАГОРОДНЫЙ МЕТАЛЛ И МЕЛКОПОРИСТОЕ МОЛЕКУЛЯРНОЕ СИТО

Изобретение относится к очистке выхлопных газов. Предложен пассивный адсорбент NO, эффективный для адсорбции NOпри температуре 200°С или ниже и для высвобождения адсорбированного NOпри температурах выше указанной температуры. Заявленные пассивный адсорбент NOсодержит благородный металл и мелкопористое молекулярное сито, имеющее максимальный размер кольца в восемь тетраэдрических атомов. Предложена также выхлопная система двигателя внутреннего сгорания и способ снижения содержания оксидов азота в выхлопном газе. Изобретение обеспечивает эффективную очистку от оксидов азота. 3 н. и 11 з.п. ф-лы, 4 табл., 5 пр.

МИКРОПОРИСТЫЕ UZM-5 ЦЕОЛИТНЫЕ НЕОРГАНИЧЕСКИЕ МЕМБРАНЫ ДЛЯ РАЗДЕЛЕНИЯ ГАЗОВ ПАРОВ И ЖИДКОСТЕЙ

Группа изобретений раскрывает микропористые UZM-5 цеолитные мембраны, способы их получения и способы разделения газов, паров и жидкостей с их использованием. Микропористые UZM-5 цеолитные мембраны с небольшими порами получают двумя способами. Один из способов включает кристаллизацию in situ одного или более слоев кристаллов UZM-5 цеолита на пористой мембранной подложке. Второй способ включает кристаллизацию с затравкой в реакционной смеси непрерывного второго слоя кристаллов UZM-5 цеолита на слое кристаллов UZM-5 цеолита, нанесенного на пористую мембранную подложку. Полученные мембраны в виде дисков, трубок или полых волокон имеют высокую термическую и химическую стабильность, стойкость к эрозии, к СОи повышенную селективность при разделении газов, паров и жидкостей. 4 н. и 6 з.п. ф-лы.

СПОСОБ ОТДЕЛЕНИЯ МЕТА-КСИЛОЛА ОТ АРОМАТИЧЕСКИХ УГЛЕВОДОРОДОВ И АДСОРБЕНТ ДЛЯ ЕГО ОСУЩЕСТВЛЕНИЯ

... 1. Способ выделения мета-ксилола из смеси, содержащей, по меньшей мере, один другой C8 алкилароматический углеводород, включающий контактирование в условиях адсорбции смеси с адсорбентом, содержащим натриевый цеолит Y со средним размером кристаллитов 50-700 нм. ! 2. Способ по п.1, в котором средний размер кристаллитов составляет 50-300 нм. ! 3. Способ по п.1 или 2, в котором содержание воды в адсорбенте, соответствующее потере при прокаливании, составляет 1,0-3,5 мас.%. ! 4. Способ по п.1 или 2, в котором смесь включает орто-ксилол, мета-ксилол, пара-ксилол и этилбензол. ! 5. Способ по п.4, в котором при контактировании смеси с адсорбентом происходит предпочтительная адсорбция мета-ксилола, находящегося в адсорбированной фазе, по сравнению с орто-ксилолом, пара-ксилолом и этилбензолом, находящимся в несорбированной фазе, причем способ дополнительно включает: ! предотвращение контакта несорбированной фазы с адсорбентом и ! десорбцию мета-ксилола, находящегося в адсорбированной фазе адсорбента ...

БРОМИРОВАННЫЕ НЕОРГАНИЧЕСКИЕ СОРБЕНТЫ ДЛЯ СНИЖЕНИЯ ВЫБРОСОВ РТУТИ

... 1. Композиция бромированного сорбента, представляющего собой бромированный неорганический сорбент, содержащий примерно от 0,5 мас.% до примерно 20 мас.% брома, из расчета на общую массу бромированного неорганического сорбента, где указанный бромированный неорганический сорбент получен из неорганического субстрата и источника брома, представляющего собойэлементарный бром, при условии, чтов тех случаях, когда элементарный бром находится в растворе или в газе-носителе, неорганический субстрат не является цеолитом ZSM-5 с соотношением SiO:AlO, составляющим примерно 70:1 или более; и/илибромистый водород, при условии, чтов тех случаях, когда бромистый водород представляет собой водный раствор бромистого водорода, неорганический субстрат или бромированный неорганический сорбент обработан источником серы, или неорганический субстрат представляет собой цементную пыль или неорганический гидроксид.2. Композиция по п.1, отличающаяся тем, что указанный бромированный неорганический сорбент представляет ...

ЦЕОЛИТ Y

... 1. Способ получения модифицированного цеолита Y, заключающийся в том, что цеолит Y, имеющий молярное отношение диоксид кремния/оксид алюминия, по меньшей мере, 10, подвергают прокаливанию при температуре от 700 до 1000°C, при этом: (i) парциальное давление водяного пара составляет самое большее 6 кПа (0,06 бар) при температуре от 700 до 800°C; (ii) парциальное давление водяного пара составляет самое большее 8 кПа (0,08 бар) при температуре от 800 до 850°C; (iii) парциальное давление водяного пара составляет, по меньшей мере, 3 кПа (0,03 бар) при температуре от 850 до 900°C; и (iv) парциальное давление водяного пара составляет, по меньшей мере, 5 кПа (0,05 бар) при температуре от 900 до 950°C; и (v) парциальное давление водяного пара составляет, по меньшей мере, 7 кПа (0,07 бар) при температуре от 950 до 1000°C.2. Способ по п.1, в котором цеолит Y имеет молярное отношение диокид кремния/оксид алюминия более 10.3. Способ по п.2, в котором прокаливание цеолита Y осуществляют в течение времени ...

АДСОРБИРУЮЩЕЕ ВЕЩЕСТВО ДЛЯ ДЕСУЛЬФУРИЗАЦИИ УГЛЕВОДОРОДНОГО МАСЛА, ЕГО ПОЛУЧЕНИЕ И ПРИМЕНЕНИЕ

... 1. Адсорбирующее вещество для десульфуризации углеводородного масла, содержащее следующие компоненты в расчете на общую массу адсорбирующего вещества:1) Si-Al молекулярное сито со структурой BEA в количестве 1-20% масс.,2) по меньшей мере одно связующее, выбранное из группы, состоящей из диоксида титана, диоксида олова, диоксида циркония и оксида алюминия, в количестве 3-35% масс.,3) источник диоксида кремния в количестве 5-40% масс.,4) оксид цинка в количестве 10-80% масс., и5) по меньшей мере один металл-промотор, выбранный из группы, состоящей из кобальта, никеля, железа и марганца, в зависимости от металла в количестве 5-30% масс., где по меньшей мере 10% масс. металла-промотора присутствует в состоянии пониженной валентности.2. Адсорбирующее вещество по п. 1, в котором Si-Al молекулярное сито со структурой BEA присутствует в количестве 2-15% масс., связующее присутствует в количестве 5-25% масс., источник диоксида кремния присутствует в количестве 10-30% масс., оксид цинка присутствует ...

VERFAHREN ZUR ENTFERNUNG VON SCHWER- UND UEBERGANGSMETALLEN AUS EINER LOESUNG

ZEOLIT-GRANULATE MIT ZEOLIT-BINDEMITTEL.

Selektive Adsorption von Stickstoff auf Magnesium enthaltende Clinoptilolite.

Adsorptionsprozess fuer saure Gase

VERFAHREN ZUR ENTFERNUNG VON AMMONIUMIONEN AUS WAESSRIGEN LOESUNGEN

Verfahren zur Herstellung von kristallinen Zeolithen

Desiccant

A process for producing a desiccant for HFC-32, HFC-152a and mixed refrigerants which contain HFC-32 and/or HFC-152a comprises immersing mouldings of a zeolite of type 3A, in which 20 to 60%, expressed as ion-equivalent mass, of sodium ions have been replaced by potassium ions, in an aqueous solution of at least one member selected from the group consisting of sodium silicate and potassium silicate, as a result of which SiO2 is deposited on the mouldings, removing the SiO2-coated mouldings from the aqueous solution, drying the wet mouldings and subsequently activating the dry mouldings. A desiccant for HFC-32, HFC-152a and mixed refrigerants which contain HFC-32 and/or HFC-152a is also provided which was prepared by this process.

Adsorbent für Ethylen, Methode zur Adsorption und Entfernung von Ethylen und Methode zur Abgasreinigung

IMPROVEMENTS RELATING TO CATALYSTS

... 1,247,015. Zeolitic hydrocarbon conversion catalysts. TEXACO DEVELOPMENT CORP. 15 Aug., 1968, No. 38966/68. Heading B1E. [Also in Division C5] A zeolitic catalyst containing a water-insoluble multivalent heavy metal compound dispersed in the unit crystallographic cells of the zeolite is prepared by a process which comprises subjecting an alkali metal or ammonium zeolite having a pore size of from 7 to 13 Angstroms to ion exchange by contact with an aqueous solution of a water-soluble salt having a multivalent heavy metal cation thereby to introduce a multivalent heavy metal ion into a cation position in the zeolite, and thereafter subjecting the multivalent heavy metal cation substituted zeolite to ion exchange by contact with an aqueous solution of a water-soluble compound having a metal-containing anion and a cation selected from alkali metal ions and ammonium ions (including quaternary ammonium ions) thereby to form a precipitated water-insoluble compound of the multivalent heavy metal ...

Chemical absorbent

Physically stable alumino-silicate zeolite catalysts

An aluminosilicate zeolite is stabilized by calcining at 350-1200 DEG F. in air or an inert gas, e.g. H2 or He, containing >10-50% water. The zeolite may be natural, e.g. fanjasite or mordenite, or synthetic, of formula 0.7-1.1 M2/nO.Al2O3.2.2-14 SiO2, where M is alkali metal; NH4, CO, Ni, Zn, Mg, Ca, Cd, Cu, or Ba (obtained by ion-exchange of the Na form); or H (obtained by calcining the NH4 form). It may, after the calcination, be impregnated with a Pt group metal, e.g. Pd; Co, Fe, Ni, Cu, Ag, Au, Mo, W, V, Zr, Ca, Mg, Hg, Pb or a rare earth metal, or compound thereof. The preparation of 13<\>rA fanjasite from NaOG, Na aluminate, and SiO2 sol is described (Example 1) which was exchanged with a solution of NH4Cl and NH4(OH) (Example 2), dried, and calcined for 16 hours at 650 DEG F. and 2 hours at 950 DEG F. in air containing 16% water (Example 4).

Improvements in or relating to synthetic crystalline mordenite

Crystalline mordenite is prepared by dispersing an amorphous alkali-metal aluminosilicate in water, adjusting the pH of the dispersion to 11.0-13.3, heating the dispersion under autogenous pressure at 200-375 DEG C., the aluminosilicate having molar ratios of SiO2/Al2O3 of 9.0-13.5 and of alkali metal oxide to alumina of 0.4-1.6. The alkali metal aluminosilicate may be obtained by reaction between an alkali metal silicate solution (e.g sodium silicate) and an inorganic aluminium salt solution (e.g. aluminium sulphate, chloride or nitrate, or an alum) at room temperature with stirring, the reaction mixture preferably having molar ratios of SiO2/Al2O3 of at least 10 and of SiO2/Na2O of 2-3.5. Alternatively, the aluminosilicate may be prepared by the method claimed in Specification 753,052. At least some of the sodium ions in a crystalline sodium mordenite prepared by the method of the invention may be replaced by other alkali metal ions, alkaline earth metal ions, zinc or hydrogen ions, using ...

Improvements in or relating to Teleprinter Line-Monitoring and Switching Arrangements

... 1,168,250. Telegraphy; Pulse duration discriminating. C.I.T. COMPAGNIE INDUSTRIELLE DES TELECOMMUNICATIONS. 19 Jan., 1967 [26 Jan., 1966], No. 2906/67. Headings H3T and H4P. A circuit for controlling a teleprinter in accordance with signals on a transmission line, particularly for disconnecting the apparatus at the end of a message, comprises first and second switching circuits actuated by a positive signal on the line to charge a capacitor and energize a relay, the receipt of a negative signal changing over the first circuit but the second circuit remaining in its actuated state until the capacitor has discharged to a predetermined level so that de-energization of the relay is delayed. In Fig. 2, the first circuit comprises transistors TR1, TR2 which are normally off but are turned on by a positive signal on the line RON applied through telegraph relay RT. Conduction of TR2 turns off the normally conducting transistor TR3, which forms the " second circuit " above, and allows conduction ...

Adsorbents for use in processes for purifying gases

An adsorbent comprising at least one zeolite and at least one metallic cation selected from Ag + and Cu 2+ is used in a process for purifying atmospheres containing traces of various pollutants, e.g. ethylene. The zeolite may be zeolite-Y or mordenite.

Purification of gaseous mixtures by selective adsorption of alkynes

C1-6 paraffins and olefines, e.g. ethylene, are freed from acetylene and other alkynes by treatment with the silver salt of a molecular sieve or of a cross-linked carboxylate cation exchanger. Suitable molecular sieves are faujasite and synthetic types A, X and Y.ALSO:Acetylene, and its mono-methyl and -ethyl derivatives, are removed from gaseous mixtures by treatment with the silver salt of a molecular sieve or of a crosslinked carboxylate cation exchanger. The preferred temperature is 0-120 DEG C. The former sorbent may be regenerated by heat at 150-400 DEG C in an oxygen-containing atmosphere, while the latter may be regenerated by treatment with an aqueous acid followed by an aqueous silver salt. Preferred molecular sieves are the mineral faujasite and the synthetic Types A, X, and Y of Specifications 777232, 777233 and 909266 respectively. The silver forms may be obtained starting from the sodium form by treatment with an aqueous silver salt, followed by washing and drying at 100-120 ...

Process for the preparation of a molecular sieve adsorbent for the size/shape selective separation of air

Passive NOx Adsorber

A passive NOx adsorber comprising a noble metal-MAZ zeolite is disclosed. The passive NOx adsorber is effective to adsorb NOx at or below a low temperature, such as 250oC and release the adsorbed NOx at temperatures above the low temperature. The passive NOx adsorber comprises a noble metal, such as palladium, and a molecular sieve having a MAZ Framework Type, selected from ZSM-4, LZ-202, mazzite and omega zeolite. The invention also includes an exhaust system comprising the passive NOx adsorber, and a method for treating exhaust gas from an internal combustion engine utilizing the passive NOx adsorber.

PRODUCTION OF A CRYSTALLINE ZEOLITE HAVING REDUCED ALUMINA CONTENT

... 1,261,616. Zeolite of increased silica content. NORTON CO. 12 Nov., 1969, No. 55303/69. Heading C1A. A crystalline zeolite with an incrased SiO 2 to Al 2 O 3 mole ratio, preferably of at last 55:1 (i.e. Al 2 O 3 constitutes less than 3% by weight of the anhydrous material), is obtained by calcining a mordenite in the hydrogen-exchanged form or a precursor thereof at at least 350‹ C. but below 850‹ C., in the absence of steam and then leaching with acid. The leaching is preferably carried out with a hot mineral acid, optionally in the presence of tartaric or citric acid.

Stabilisation of zeolites

A zeolite of formula M2O :Al2O3 : 3.5-7 SiO2:0-9 H2O, where M is alkali metal, is base exchanged with a solution containing H+ ions or cations which decompose to give H+ ions, until the alkali metal content (as oxide) is 1-4% b.w., and then heated at 700-870 DEG C. The exchange solution may be of an inorganic or organic acid, an ammonium or quarternary ammonium compound or salt of an organic N base, or a cross-linked vinyl ion exchange resin in its H form. Exhaustive lists of suitable materials are given. The exchange cations may be present in excesses of 5-600 vol. per cent, and the exchange carried out at 25-150 DEG C. The initial zeolite may be natural or synthetic faujasite, e.g. 2-14 HS prepared as described in Specification 986,864. The product is said to have the formula (xM2O. yH2O):Al2O3:3.5-7 SiO2:0-9 H2O where x is 0.1-0.3 and y is 0-9, and has a unit cell size of 24.4-24.55A.

Packaging films

CORROSION PROTECTION AND CORROSION-PROTECTIVE COMPOSITION

... 1503153 Zeolite HOECHST AG 11 April 1975 [11 April 1974] 14996/75 Heading C1A [Also in Divisions C3 C4 and B2] A zeolite containing at least 30 equivalent per cent of divalent lead, zinc, manganese or cobalt ions is prepared by treating a sodium zeolite with a corresponding metal salt. Preferably the zeolite is of type A, P or X.

AROMATIC HYDROCARBON ISOMER SEPARATION PROCESS

... 1535232 Zeolite adsorbent UOP Inc 19 Feb 1976 [27 March 1975] 06540/76 Heading C1A [Also in Division C5] A zeolite adsorbent for separating alkylaromatics is prepared by:- contacting a base material comprising Y zeolite with an aqueous sodium hydroxide solution at first ion exchange conditions to effect the addition of sodium cations to said base material; treating the sodium-exchanged base material at second ion exchange conditions to effect essentially complete exchange of the sodium cations with one or more cations selected from potassium, cesium and rubidium; and drying the so-exchanged material to reduce the LOI (loss on ignition) at 900‹ C. to less than 10 weight per cent.

Absorption of volatile organic compounds derived from organic matter.

WATER-RESISTANT COMPOSITION

WATER-RESISTANT COMPOSITION

Absorption of volatile organic compounds derived from organic matter.

Absorption of volatile organic compounds derived from organic matter.

WATER-RESISTANT COMPOSITION

PROCEDURE FOR THE TRIBOCHEMI PRODUCTION A ORGANOZEOLITHEN AS ADSORBENT FOR MYCOTOXINE,

ZEOLITH IN DER BIOGASGEWINNUNG

PRODUCTION OF ZEOLITE AGGLOMERATES.

ZEOLITES, PROCEDURES FOR YOUR TREATMENT AND USE OF THE TREATED ZEOLITES.

MATERIAL FOR THE DETOXIKATION OF BODY STRANGERS, TOXIC OF WORKING SUBSTANCES IN THE BLOOD

Procedure for the treatment of a gas flow for the separation of a sour gas

ADSORBENT AND ADSORPTIVES SEPARATION PROCEDURE

Drained metallhältiges zeolithisches molecular sieve

Procedure for the production of a product applicable as adsorbent, Katalysatorträger and/or catalyst

Procedure for the production of a synthetic, crystalline, zeolithischen molecular sieve

PROCEDURE FOR THE PRODUCTION OF LITHIUM EXCHANGE AGGLOMERIERTEN X AND LSX-TYP ZEOLITES

Procedure for cracking hydrocarbons

SELECTIVE ADSORPTION OF NITROGEN ON MAGNESIUM-CONTAINING CLINOPTILOLITES

PARAXYLENE RECOVERY WITH ZEOLITE ADSORBENT

GIS-type zeolite

Provided is a GIS-type zeolite having a (101) diffraction peak where a diffraction angle 2θ=12.55° to 12.90° in a spectrum obtained by x-ray diffraction.

Regenerative removal of trace carbon monoxide

Temperature swing adsorption process for the separation of target species from a gas mixture

A temperature swing adsorption process for the removal of a target species, such as an acid gas, from a gas mixture, such as a natural gas stream. Herein, a novel multi-step temperature swing/pressure swing adsorption is utilized to operate while maintaining very high purity levels of contaminant removal from a produc t stream. The present process is particularly effective and beneficial in removing contaminants such as C0 ...

Gas purification process utilizing engineered small particle adsorbents

A gas separation process uses a structured particulate bed of adsorbent coated shapes/particles laid down in the bed in an ordered manner to simulate a monolith by providing longitudinally extensive gas passages by which the gas mixture to be separated can access the adsorbent material along the length of the particles. The particles can be laid down either directly in the bed or in locally structured packages/bundles which themselves are similarly oriented such that the bed particles behave similarly to a monolith but without at least some disadvantages. The adsorbent particles can be formed with a solid, non-porous core with the adsorbent formed as a thin, adherent coating on the exposed exterior surface. Particles may be formed as cylinders/hollow shapes to provide ready access to the adsorbent. The separation may be operated as a kinetic or equilibrium controlled process.

Pressure-temperature swing adsorption process

A pressure-temperature swing adsorption process for the removal of a target species, such as an acid gas, from a gas mixture, such as a natural gas stream. Herein, a novel multi-step temperature swing/pressure swing adsorption is utilized to operate while maintaining very high purity levels of contaminant removal from a product stream. The present process is particularly effective and beneficial in removing contaminants such as CO ...

Zeolite adsorbents having a high external surface area and uses thereof

The present invention concerns the use, for gas separation, of at least one zeolite adsorbent material comprising at least one FAU zeolite, said adsorbent having an external surface area greater than 20 m ...

A method of dewatering organic liquids

HIGH STABILITY FAUJASITE TYPE ZEOLITES WITH CERIUM RICH RARE EARTH MIXTURES

A method for purifying water of pesticides

Molecular sieve desulfurizers and methods of making them

ARSENIC REMOVAL FROM AQUEOUS MEDIA USING CHEMICALLY TREATED ZEOLITE MATERIALS

Systems (300) and methods are provided for the removal and disposal of arsenic from an aqueous medium. The systems (300) and methods include the removal of arsenic from a source by contact with either a chemically treated natural or synthetic zeolite (302), for example a ferric-loaded zeolite. The spent zeolite is disposed of at an appropriate arsenic disposal site (312). A system for monitoring (304) and maintaining an arsenic removal/disposal system by an off-site provider is also disclosed.

HYDROGEN GENERATOR HAVING SULFUR COMPOUND REMOVAL AND PROCESSES FOR THE SAME

Apparatus and processes for the generation of hydrogen from hydrocarbon feeds are provided in which organosulfur compound is removed from the feed. The apparatus and processes are particularly advantageous as smaller scale hydrogen generators including those generators intended for residential use to produce hydrogen for fuel cells to produce electricity. In the processes and apparatus, the feed is contacted with solid sorbent to remove organosulfur compound.

METHOD OF PURIFYING A GAS STREAM CONTAMINATED BY CO2 AND ONE OR MORE HYDROCARBONS AND/OR NITROGEN OXIDES BY ADSORPTION ON AN AGGREGATED ZEOLITIC ADSORBENT

The present invention relates to a novel method of purifying a gas stream contaminated by CO2, hydrocarbons and/or nitrogen oxides, in particular a gas stream based an air or a syngas, by adsorption an a bed of aggregated zeolitic adsorbent based an an LSX zeolite or LSX and X zeolites, of which at least 90% of the exchangeable cationic sites of the LSX zeolite or of the LSX/X zeolite blend are occupied by sodium Ions, and the inert binder of which represents at most 5% of the weight of the adsorbent.

BIFUNCTIONAL MATERIAL FOR NITRIC OXIDE STORAGE AND PRODUCTION AND USE THEREOF IN THERAPY

The present invention relates to a bifunctional material which comprises copper and which is capable of storing nitric oxide (NO), as well as catalytically producing nitric oxide from a suitable precursor. The material typically comprises a zeolite and the copper may be part of, or separate from the zeolite. In this manner, the material may comprise a single bifunctional material; that is, a material which is capable of both storing NO and catalytically producing NO, such as Cu-MFT or Cu-X. Alternatively the material may comprise at least two components, a first component to store NO, such as a zeolite Zn-LTA, and a further component comprising Cu(I), such as Cu2O, to catalytically produce NO from a suitable precursor. The bifunctional material is used in a pharmaceutical, neutraceutical or cosmetic preparation, or comprised in a medical article, a cosmetic and/or personal hygiene product.

SEPARATION AND RECOVERY OF ETHYLBENZENE FROM C8 AROMATIC MIXTURES USING RUBIDIUM-X SIEVES

A new composition of matter, a method for the preparation of a rubidium exchanged Type X structured zeolite and a separation process employing the same. The zeolite adsorbent is prepared by a procedure employing the aqueous ion exchange step and a final activation step including contacting a sodium-X zeolite with a rubidium salt in aqueous solution. The process involves the selective separation of ethylbenzene from a C8 aromatic isomer mixture containing ethylbenzene and employs the use of the rubidium exchanges type X structured zeolite in an adsorption separation process.

PREPARATION OF LOW VISCOSITY POLYETHER POLYOLS

This invention relates to a process for the preparation of polyether polyols from a water-soluble polyhydric initiator which comprises charging a reactor with the water-sol-uble initiator, water and ammonia or an alkanolamine or a primary alkyl amine or alkylene diamine mixing and reacting ethylene oxide and an alkylene oxide having three or four carbon atoms at elevated temperature , not greater than about 110.degree.C., and pressure to yield a polyether polyol, said reaction occuring absent an added catalyst.

PARAXYLENE RECOVERY WITH ZEOLITE ADSORBENT

PRODUCTION OF ZEOLITE AGGLOMERATES

Strengthened zeolite molecular sieve agglomerates are prepared by treating the agglomerates with an aqueous solution of a water soluble silicon compound and subsequently with an aqueous solution of a mineral acid of sufficient strength to decationise the molecular sieve and/or increase its SiO2 : Al2O3 ratio. The strengthened agglomerates are suitable for use as catalyst supports.

SEPARATION OF MIXTURES WITH MODIFIED ZEOLITES

SEPARATION OF AROMATIC ISOMERS

SEPARATION OF AROMATIC ISOMERS A mixture of C8 and higher aromatics, including para-xylene, meta-xylene, ortho-xylene and ethylbenzene, is separated by an adsorption/desorption procedure to provide rapid recovery of the valuable xylene components. In this process, the aromatic mixture is passed through an adsorption column, preferably containing a certain zeolite adsorbent, in which column the meta-xylene and ortho-xylene pass through relatively uninhibited, whereas the para-xylene and ethylbenzene and other aromatics are adsorbed in the column. The meta-xylene and orthoxylene are removed and distilled to effect separation. The paraxylene/ethylbenzene mixture in the column is then desorbed and separated by conventional procedures. In addition, complete and continuous procedures are also provided for maximum separation of all components by operation of two or more columns in parallel in a system such that adsorption is conducted in one column while desorption is carried out in the other ...

RARE EARTH TRANSITION METAL EXCHANGED FAUJASITES

SWEETENING CATALYST

PREVENTION OF SILICA PORE OBSTRUCTION IN CRYSTALLINE ALUMINOSILICATES

CATALYST AND PROCESSES FOR ITS MANUFACTURE AND USE

METHOD OF INCREASING THE THERMAL STABILITY OF CRYSTALLINE ZEOLITES

PROCESS FOR THE SEPARATION OF PARA-XYLENE

CHARACTERISTICS OF TUNABLE ADSORBENTS FOR RATE SELECTIVE SEPARATION OF NITROGEN FROM METHANE

The present invention generally relates to a pressure swing adsorption process for separating an adsorbate impurity from a feed stream comprising product gas, said process comprising feeding the feed stream to an adsorbent bed at a pressure of from about 60 psig to 2000 psig, wherein said adsorbent bed comprises adsorbent having: An isosteric heat of adsorption of from about 5kJ/mol to about 30kJ /mol, as determined by the LRC method, for the adsorbate, and an equivalent 65kJ/mol or less isosteric heat of adsorption for the product, wherein the adsorbent has a rate of adsorption for the adsorbate impurity that is at least 10 times greater than the rate of adsorption for the product gas as determined by the TGA method and recovering said product gas with a reduced a level of said adsorbate impurity. The invention also related to an adsorbent useful in PSA separations, particularly separating N2 from methane, CO2 from methane O2 from N2 and the like.

LARGE CRYSTAL TUNABLE ADSORBENTS

The present invention relates to a surface modified zeolite adsorbent wherein the surface of said zeolite is modified with a coating comprised of a silicone derived species, said zeolite having a mean crystal size from about 5 to about 10 µm and a skeletal density of = 1.10 gr./cc. The invention is based on the discovery that larger crystals tend to have higher particle density, and the packing of the larger crystals in agglomeration processes leads to more idealized packing to provide a larger mean-pore diameter. The surface modified adsorbent provides rate selectivity for one gas over others is described. The superior adsorbent has the added convenience of bead forming simultaneously with pore modification as well as having the treatment result in the yielding of high crush strength products.

CHARACTERISTICS OF TUNABLE ADSORBENTS FOR RATE SELECTIVE SEPARATION OF NITROGEN FROM METHANE

The present invention generally relates to a process that utilizes tunable zeolite adsorbents in order to reduce the bed size for nitrogen removal from a methane (or a larger molecule) containing stream. The adsorbents are characterized by the rate of adsorption of nitrogen and methane and the result is a bed size that is up to an order of magnitude smaller with these characteristics (in which the rate selectivity is generally 30) than the corresponding bed size for the original tunable zeolite adsorbent that has a rate selectivity of >100x.

ZEOLITE AGGLOMERATE MATERIAL, METHOD OF PRODUCTION, AND USE FOR THE NON-CRYOGENIC SEPARATION OF GAS

La présente invention concerne de nouveaux matériaux adsorbants zéolithiques tout particulièrement spécifiques et adaptés pour la séparation non cryogénique des gaz, et plus particulièrement pour la séparation de l'azote par adsorption dans des flux gazeux tels que l'air ainsi que la purification de l'hydrogène par adsorption de monoxyde de carbone (CO) et/ou d'azote (N2), ainsi que leur utilisation notamment pour la préparation d'oxygène médicaldans des concentrateurs d'oxygène d'assistance respiratoire.

METHODS FOR REMOVAL OF WATER FROM GASES USING SUPERHEATED ZEOLITES

A method for removing trace moisture from a gas is disclosed. The method involves heating a zeolite having a high silica-to-alumina ratio to about 400 ~C to remove physically absorbed water from the zeolite, followed by heating the zeolite to a temperature in excess of 650 ~C, to form a superheated zeolite. Heating to temperatures of 650 ~C or above is believed to cause dehydroxylation of the zeolite. A method for the preparation of a dehydroxylated zeolite is also disclosed. The superheated zeolite is contacted with the gas, thereby adsorbing water from the gas. A dehydroxylated zeolite for removing trace moisture from a gas wherein the zeolite has a high silica- to-alumina ratio and a low level of metallic impurities is also disclosed. The zeolite and methods of the invention are particularly useful for removing trace water from acid gases such as hydrogen chloride and hydrogen bromide.

AGGLOMERATED ZEOLITIC ADSORBENTS, THEIR METHOD OF PREAPRATION AND THEIR USES

La pr‚sente invention concerne des adsorbants z‚olitiques agglom‚r‚s … ba se de z‚olite X de rapport Si/Al tel que 1,15 Подробнее

ADSORPTION OF VOLATILE ORGANIC COMPOUNDS DERIVED FROM ORGANIC MATTER

The use of palladium doped ZSM-5 to adsorb volatile organic compounds (VOCs) derived from organic matter, optionally at ambient temperature. The organic matter can be perishable organic goods such as food, including fruit and/or vegetables, horticultural produce, including plants and/or cut flowers, or refuse. Palladium doped ZSM-5 with a Si: Al ratio of less than or equal to 100:1 and a palladium content of from 0.1 wt% to 10.0 wt% based on the total weight of the doped ZSM-5 are also claimed.

ZEOLITE ADSORBENTS HAVING A HIGH EXTERNAL SURFACE AREA AND USES THEREOF

La présente invention concerne l'utilisation, pour la séparation et/ ou le séchage de gaz, d'au moins un matériau adsorbant zéolithique comprenant au moins une zéolithe de type A, ledit adsorbant présentant une surface externe supérieure à 20 m2 · g-1, une teneur en phase non zéolithique (PNZ) telle que 0 < PNZ = 30%, et de ratio atomique Si/AI compris entre 1,0 et 2,0. L'invention concerne également un matériau adsorbant zéolithique présentant un rapport Si/AI compris entre 1,0 et 2,0, un volume mésoporeux compris entre 0,07 cm3 · g-1 à 0,18 cm3 ·g-1, un rapport (Vmicro - Vméso) / Vmicro compris entre -0,3 et 1,0, bornes non incluses, et une teneur en phase non zéolithique (PNZ) telle que 0 < PNZ = 30%.

DESULFURIZATION SYSTEM FOR HYDROCARBON FUEL

The present invention provides a desulfurization system for desulfurizing a hydrocarbon fuel containing a light amount of methanol and a slight amount of water. The desulfurization system comprises a Y-type zeolite-based desulfurizing agent containing at least copper arranged upstream of the system and an X-type zeolite-based desulfurizing agent containing at least silver arranged downstream of the system and thus can maintain desulfurization effect for a long period of time.

SWING ADSORPTION PROCESSES UTILIZING CONTROLLED ADSORPTION FRONTS

A process for reducing the loss of valuable products by improving the overall recovery of a contaminant gas component in swing adsorption processes. The present invention utilizes at least two adsorption beds, in series, with separately controlled cycles to control the adsorption front and optionally to maximize the overall capacity of a swing adsorption process and to improve overall recovery a contaminant gas component from a feed gas mixture.

METHOD AND APPARATUS FOR THE SUPPLY OF DRY GASES

A built in purifier for a cylinder of essentially nitrogen free gas having a low water content is provided with a molecular sieve 3A adsorbent to adsorb water from the gas, the 3A adsorbent having a particularly low adsorption capacity for nitrogen.

COMPOUND DESIGNED TO REGULATE THE PRESENCE OF WATER ON AN OUTSIDE SURFACE

Composition destinée à réguler la présence d'eau sur une surface extérieure La présente invention a pour objet une composition (1) pour surface extérieure, caractérisée en ce que cette composition (1) comprend au moins un mélange d'un minéral microporeux de type zéolithe (2) et d'un sel (3) pour permettre un effet d'adsorption et/ou de désorption, cette composition (1) comprenant un enrobage par un film perméable (9) au moins partiellement le minéral microporeux de type zéolithe (2).

METHYL IODIDE ADSORBER, USE THEREOF AND METHOD FOR THE ADSORPTION OF METHYL IODIDE

A methyl iodide adsorber is provided, comprising a zeolite containing at least one iodide-adsorbing metal or a compound thereof, wherein the zeolite is a hydrophobic zeolite. A use of the adsorber and a method for adsorption of methyl iodide are also specified.

ADSORPTIVE SEPARATION OF NITROGEN FROM OTHER GASES

Type X zeolites whose charge-compensating cations are composed of 95 to 50% lithium ions, 4 to 50% of one or more of aluminum, cerium, lanthanum and mixed lanthanides and 0 to 15% of other ions. The zeolites preferentially adsorb nitro gen from gas mixtures.

SYSTEM FOR EXHAUST GAS PURIFICATION

A system for exhaust gas purification disposed in the exhaust pipe of an internal combustion engine, which includes a zeolite as adsorbent component capable of adsorbing the hydrocarbons present in the exhaust gas emitted from the engine and a catalyst capable of reducing the harmful substances present in the exhaust gas; the system satisfies the following condition: a/c = 3 to 50 cc/g wherein a is the total volume of the pores of diameters of 10 .ANG. or smaller possessed by the zeolite as measured using N2, and c is the total amount of the hydrocarbons emitted from the engine during the period of 140 seconds from the start of the engine when the engine is operated in accordance with the LA-4 mode of FTP, thereby the adsorption capacity of the zeolite used as a HC adsorbent is optimized against the amount of the HC discharged from an engine during a certain period of the cold start so as to adsorb and purify the HC effectively.

IMPROVEMENT IN PSA PROCESSES FOR THE PURIFICATION OF HYDROGEN

Le perfectionnement consiste à utiliser, comme charge adsorbante des faujasites à faible rapport Si/Al, en particulier des faujasites LSX (Si/Al = 1) échangées au lithium, voire échangées par du lithium et une faible quantité de calcium.

Molecular Sieve Of MFS Framework Type With Controllable Average Size, Its Method of Making And Use

A method of making a crystalline molecular sieve of MFS framework type, preferably ZSM-57, from a synthesis mixture comprising at least one source of tetravalent element (Y), at least one source of trivalent element (X), at least one source of alkali metal hydroxide (MOH), at least one structure-directing-agent (R) and water, said alkali metal (M) comprising potassium, and having the following mole composition (expressed in terms of oxide): YO 2 :( p )X 2 O 3 :( q )OH − :( r )R:( s )H 2 O, wherein (p) is in the range from 0.005 to 0.05, (q) is in the range from 0.01 to 3, (r) is in the range from 0.03 to 2 and (s) is in the range from 10 to 75 (based on total weight of said synthesis mixture); wherein the crystals of molecular sieve formed having an average diameter (D) of less than or equal to 1.5 micron and an average thickness (T) of less than or equal to 300 nanometers.

Swing Adsorption Processes Utilizing Controlled Adsorption Fronts

A process for reducing the loss of valuable products by improving the overall recovery of a contaminant gas component in swing adsorption processes. The present invention utilizes at least two adsorption beds, in series, with separately controlled cycles to control the adsorption front and optionally to maximize the overall capacity of a swing adsorption process and to improve overall recovery a contaminant gas component from a feed gas mixture.

Pressure-Temperature Swing Adsorption Process for the Separation of Heavy Hydrocarbons from Natural Gas Streams

The present invention relates to a pressure-temperature swing adsorption process wherein gaseous components that have been adsorbed can be recovered from the adsorbent bed at elevated pressures. In particular, the present invention relates to a pressure-temperature swing adsorption process for the separation of C 2+ hydrocarbons (hydrocarbons with at least 2 carbon atoms) from natural gas streams to obtain a high purity methane product stream. In more preferred embodiments of the present processes, the processes may be used to obtain multiple, high purity hydrocarbon product streams from natural gas stream feeds resulting in a chromatographic-like fractionation with recovery of high purity individual gaseous component streams.

Gas Purification Process Utilizing Engineered Small Particle Adsorbents

A gas separation process uses a structured particulate bed of adsorbent coated shapes/particles laid down in the bed in an ordered manner to simulate a monolith by providing longitudinally extensive gas passages by which the gas mixture to be separated can access the adsorbent material along the length of the particles. The particles can be laid down either directly in the bed or in locally structured packages/bundles which themselves are similarly oriented such that the bed particles behave similarly to a monolith but without at least some disadvantages. The adsorbent particles can be formed with a solid, non-porous core with the adsorbent formed as a thin, adherent coating on the exposed exterior surface. Particles may be formed as cylinders/hollow shapes to provide ready access to the adsorbent. The separation may be operated as a kinetic or equilibrium controlled process.

Microporous uzm-5 inorganic zeolite membranes for gas, vapor, and liquid separations

The present invention discloses microporous UZM-5 zeolite membranes, methods for making the same, and methods of separating gases, vapors, and liquids using the same. The small-pore microporous UZM-5 zeolite membrane is prepared by two different methods, including in-situ crystallization of one or more layers of UZM-5 zeolite crystals on a porous membrane support, and a seeding method by in-situ crystallization of a continuous second layer of UZM-5 zeolite crystals on a seed layer of UZM-5 zeolite crystals supported on a porous membrane support. The membranes in the form of disks, tubes, or hollow fibers have superior thermal and chemical stability, good erosion resistance, high CO 2 plasticization resistance, and significantly improved selectivity over polymer membranes for gas, vapor, and liquid separations.

Fluid Filtration Medium

The present application relates to improved filtration of fluids. Particularly, a surfactant-treated zeolite material may be utilized for removing turbid particles from a volume of fluid, such as water.

Composition comprising an activated carbon, a zeolite, and fe ions for a vehicle passenger compartment air filter

The invention relates to a composition ( 1 ) comprising an activated carbon ( 4 ) and a zeolite ( 2 ), the zeolite ( 2 ) comprising Fe ions. The invention also relates to an air filter ( 12 ) for a ventilation, heating, and/or air conditioning system comprising this composition ( 1 ).

Method and apparatus for the supply of dry gases

A built in purifier for a cylinder of essentially nitrogen free gas having a low water content is provided with a molecular sieve 3A adsorbent to adsorb water from the gas, the 3A adsorbent having a particularly low adsorption capacity for nitrogen.

Hydrocarbon feedstock average molecular weight increase

The invention deals with hydrocarbon feedstock molecular weight increase via olefin oligomerization and/or olefin alkylation onto aromatic rings. Addition of a purification section allows improved unit working time and lower maintenance.

Titano-silico-alumino-phosphate

A titano-silico-aluminophosphate which contains tetrahedrally coordinated titanium in the framework structure, which has a free coordination site for CO which can be detected by means of a characteristic IR band at 2192±5 cm −1 . The titano-silico-aluminophosphate has extremely high hydrothermal stability and has a good adsorption capacity even at higher temperatures. Also, a hydrothermal method to obtain a titano-silico-aluminophosphate starting from a synthetic gel mixture of an aluminium, phosphorus, silicon and a titanium source, as well as corresponding templates.

Gas separation adsorbents and manufacturing method

The present invention generally relates to high rate adsorbents and a method for their manufacture involving the steps of component mixing, extrusion, spheronization and calcination. The component mixing can involve both dry mixing in addition to wet mixing of an adsorbent with a binder, if required, and a fluid such as water. The paste so formed from the mixing stage is extruded to produce pellets which are optionally converted to beads by spheronization using in one embodiment, a marumerizer. The product is harvested and calcined to set any binder or binders used and/or burn out any additives or processing aids. This basic manufacturing scheme can be augmented by extra processing steps including ion exchange and activation to alter the composition of the adsorbents, as required.

Metal-carrying zeolite for alcoholic beverages and alcoholic beverage manufacturing method

The metal-supported zeolite for alcoholic beverages of the present invention is a zeolite that carries a metal component, wherein the metal component is silver, and the zeolite is at least one selected from a beta-type one and a Y-type one. The metal-supported zeolite is for removing unwanted components contained in alcoholic beverages.

ZEOLITE, SEPARATION MEMBRANE STRUCTURE, AND METHOD OF MANUFACTURING A ZEOLITE

A zeolite includes Si, Al, Ag and at least one of an alkali metal or alkaline earth metal, and satisfies the relation 0.02≦Ag[mol %]/(Si[mol %]+10×T[mol %])≦0.17 (wherein, T[mol %] denotes the molar concentration of the alkali metal and alkaline earth metal.) 110-. (canceled)11. A zeolite used in olefin/paraffin separation , the zeolite comprising Si , Al , Ag and at least one of an alkali metal or alkaline earth metal , and satisfying the following inequality:{'br': None, '0.02≦Ag[mol %]/(Si[mol %]+10×T[mol %])≦0.17'}wherein T[mol %] denotes the molar concentration of the alkali metal and alkaline earth metal.12. The zeolite according to and satisfying the following inequality:{'br': None, '0.03≦Ag[mol %]/(Si[mol %]+10×T[mol %])≦0.14'}wherein T[mol %] denotes the molar concentration of the alkali metal and alkaline earth metal.13. The zeolite according to claim 11 , whereina maximum value of an inner diameter of at least one of a plurality of pores is greater than or equal to 0.4 nm.14. The zeolite according to claim 11 , whereinthe maximum value of the inner diameter of the respective plurality of pores is less than or equal to 0.7 nm.15. A separation membrane structure used in olefin/paraffin separation claim 11 , the separation membrane structure comprising:a porous substrate main body; and {'br': None, '0.02≦Ag[mol %]/(Si[mol %]+10×T[mol %])≦0.17'}, 'a zeolite membrane disposed on a surface of the substrate main body, wherein the zeolite membrane comprises Si, Al, Ag and at least one of an alkali metal or alkaline earth metal, and satisfies the following inequalitywherein T[mol %] denotes a molar concentration of the alkali metal and alkaline earth metal.16. The separation membrane structure according to and satisfying the following inequality:{'br': None, '0.03≦Ag[mol %]/(Si[mol %]+10×T[mol %])≦0.14'}wherein T[mol %] denotes the molar concentration of the alkali metal and alkaline earth metal.17. The separation membrane structure according to claim 15 , ...

CHARACTERISTICS OF TUNABLE ADSORBENTS FOR RATE SELECTIVE SEPARATION OF NITROGEN FROM METHANE

The present invention generally relates to a process that utilizes tunable zeolite adsorbents in order to reduce the bed size for nitrogen removal from a methane (or a larger molecule) containing stream. The adsorbents are characterized by the rate of adsorption of nitrogen and methane and the result is a bed size that is up to an order of magnitude smaller with these characteristics (in which the rate selectivity is generally 30) than the corresponding bed size for the original tunable zeolite adsorbent that has a rate selectivity of >100x. 1. A pressure swing adsorption process for kinetic separation of Nfrom a feed stream comprising at least methane and N , said process comprising feeding the feed stream to an adsorbent bed comprising adsorbent having:{'sub': '2', 'a rate of adsorption of at least 0.036 mmol/g/min for Nas determined by the Hiden method and'}{'sup': th', 'th, 'sub': '2', "a rate of adsorption of methane that is ⅙to 1/10000the adsorbent's adsorption rate for Nas determined by the Hiden method"}{'sub': '2', 'and recovering a product stream containing said at least methane gas with a reduced level of N.'}2. The process of wherein the adsorbent has an adsorption rate of at least 0.143 mmol/g/min for Nimpurity as determined by the Hiden method and an adsorption rate for methane that is 1/10to 1/1000of the adsorption rate for Nas determined by the Hiden method.3. The process of wherein said adsorbent comprises zeolite A claim 1 , X claim 1 , Y claim 1 , chabazite claim 1 , mordenite claim 1 , faujasite claim 1 , clinoptilolite claim 1 , ZSM-5 claim 1 , L claim 1 , Beta claim 1 , or combinations thereof.4. The process of wherein said adsorbent is a zeolite exchanged with at least one cation selected from Li claim 3 , Na claim 3 , K claim 3 , Mg claim 3 , Ca claim 3 , Sr claim 3 , Ba claim 3 , Cu claim 3 , Ag claim 3 , Zn claim 3 , NH4+ and combinations or mixtures thereof5. The process of wherein said adsorbent is zeolite A.6. The process according to ...

Adsorbent for contaminant removal from c4 hydrocarbons

A process is provided for removing contaminants from olefin containing C 4 streams. The streams are contacted with an X based zeolite adsorbent comprising greater than 88% X zeolite at a SiO 2 /Al 2 O 3 ratio of less than 2.5 and an alkali metal salt present in excess of an amount required to achieve full exchange of cation sites on the X based zeolite. The resulting alkali oxide on a volatile free basis is less than 1% (by mass) of the X based adsorbent. The contaminants that are removed include sulfur, oxygenate, and nitrogen based contaminants.

HYDROCARBON REFORMING/TRAPPING MATERIAL AND METHOD FOR REMOVING HYDROCARBON

To provide a hydrocarbon reforming/trapping material which is capable of adsorbing and reforming a hydrocarbon. A hydrocarbon reforming/trapping material of the present invention has an SiO/Al2Oratio of from 7 to 12, and contains an Fe(II)-substituted beta zeolite which is ion-exchanged by Fe(II) ions. The amount of supported Fe(II) is preferably 0.001-0.5 mmol/g with respect to the Fe(II)-substituted beta zeolite. This Fe(II)-substituted beta zeolite is suitably produced by dispersing and mixing a beta zeolite having an SiO/AlOratio of from 7 to 12 in an aqueous solution of a water-soluble compound of divalent iron, and mixing and stirring the solution, so that Fe(II) ions are supported on the beta zeolite. 19-. (canceled)10. A hydrocarbon reforming/trapping material comprising an Fe(II)-substituted beta zeolite which has been ion-exchanged with Fe(II) ions , where an SiO/AlOratio is from 7 to 12.11. A hydrocarbon reforming/trapping material according to claim 10 , wherein a supported amount of Fe(II) is 0.001 to 0.5 mmol/g with respect to the Fe(II)-substituted beta zeolite.12. A hydrocarbon reforming/trapping material according to claim 10 , wherein claim 10 , as a beta zeolite before being ion-exchanged with Fe(II) ions claim 10 , a beta zeolite having a SiO/AlOratio from 7 to 12 is used.13. A hydrocarbon reforming/trapping material according to claim 11 , wherein claim 11 , as a beta zeolite before being ion-exchanged with Fe(II) ions claim 11 , a beta zeolite having a SiO/AlOratio from 7 to 12 is used.14. A hydrocarbon reforming/trapping material according to claim 10 , wherein a BET specific surface area is 300 to 600 m/g claim 10 , a micropore specific surface area is 270 to 500 m/g claim 10 , and a micropore volume is 0.14 to 0.25 cm/g.15. A hydrocarbon reforming/trapping material according to claim 11 , wherein a BET specific surface area is 300 to 600 m/g claim 11 , a micropore specific surface area is 270 to 500 m/g claim 11 , and a micropore volume is 0 ...

Materials, methods, and devices for siloxane contaminant removal

Adsorbent materials are disclosed, along with filter elements containing the adsorbent materials methods of using adsorbents to remove slioxane contaminants from a gas stream. The method includes providing an adsorbent material that has been washed with an acid and passing a gas through the adsorbent material so as to reduce siloxane levels in the gas. A filter element for reducing siloxane levels in a gas includes a first adsorbent material, the first adsorbent material comprising an acid-washed adsorbent; and a second adsorbent material, the second adsorbent material comprising an acid-impregnated adsorbent.

METHOD FOR PRODUCING METAL-SUPPORTED ZEOLITE FOR ALCOHOLIC BEVERAGES, METAL-SUPPORTED ZEOLITE FOR ALCOHOLIC BEVERAGES, AND METHOD FOR PRODUCING ALCOHOLIC BEVERAGES

The invention is to provide a method for producing a metal-supported zeolite for alcoholic beverages capable of efficiently removing unwanted components contained in alcoholic beverages to thereby reduce silver release, and the metal-supported zeolite for alcoholic beverages, and to provide a method for producing alcoholic beverages using the metal-supported zeolite for alcoholic beverages. For solution to problem, the production method for the metal-supported zeolite for alcoholic beverages of the invention is a production method for a metal-supported zeolite for alcoholic beverages for removing unwanted components contained in alcoholic beverages, and includes a first ion-exchange treatment step of processing a zeolite carrying a metal ion with an ammonium ion-containing aqueous solution to thereby exchange the metal ion in the zeolite for an ammonium ion, the zeolite containing a Y-type zeolite as the main ingredient, and a second ion-exchange treatment step of processing the ammonium ion-supported zeolite obtained in the previous ion-exchange treatment step with a silver ion-containing acidic aqueous solution to thereby exchange the ammonium ion therein with a silver ion. 1. A method for producing a metal-supported zeolite , comprising:performing a first ion-exchange treatment comprising processing a zeolite carrying a metal ion with an ammonium ion-containing aqueous solution to thereby exchange the metal ion in the zeolite for an ammonium ion, the zeolite comprising a Y-type zeolite as the main ingredient, andperforming a second ion-exchange treatment comprising processing the ammonium ion-supported zeolite obtained in the previous ion-exchange treatment with a silver ion-containing acidic aqueous solution to thereby exchange the ammonium ion therein with a silver ion.2. The method according to claim 1 , wherein the ammonium ion-containing aqueous solution is selected from the group consisting of an aqueous ammonium nitrate solution claim 1 , an aqueous ...

Silver-carrying zeolite molded article

Provided are: a silver-carrying zeolite molded article in which aggregation of silver is inhibited and which has excellent capability of dispersing silver, when compared to conventional silver-carrying zeolite molded articles; and a method for producing the silver-carrying zeolite molded article. In the silver-carrying zeolite molded article, the molar ratio of Si/Al2 is 2.0-3.0, the molar ratio of (alkali metal+Ag)/Al is 0.9-1.1, the total amount of SiO2, Al2O3, Ag2O, and alkali metal oxides is 90 wt % or more, the contained amount of silver ions is 5 wt % or more, and only a single type of zeolite is contained. The molded article can be produced by subjecting a zeolite molded article having zeolite purity of 90% or more to an ion exchange treatment using a silver-containing aqueous solution.

WATER-RESISTANT COMPOSITION

The present invention provides a water-resistant composition for adsorbing volatile organic compounds (VOCs) derived from organic matter including: a) palladium doped hydrogen-ZSM-5, wherein the Si:Al ratio of the hydrogen-ZSM-5 is less than or equal to 200:1; and b) at least one water-soluble binder. The invention also provides a method for using the water-resistant composition for adsorbing volatile organic compounds (VOCs) derived from organic matter. 1. A water-resistant composition for adsorbing volatile organic compounds (VOCs) derived from organic matter comprising:a) palladium doped hydrogen-ZSM-5, wherein the Si:Al ratio of the hydrogen-ZSM-5 is less than or equal to 200:1; andb) at least one water-soluble binder.2. A water-resistant composition according to claim 1 , wherein the Si:Al ratio of the hydrogen-ZSM-5 is less than or equal to 100:1.3. A water-resistant composition according to claim 1 , wherein the water-soluble binder is selected from the group consisting of at least one polyvinyl alcohol claim 1 , gum claim 1 , cellulose claim 1 , cellulose derivative and polyethylene oxide.4. A water-resistant composition according to claim 1 , further comprising one or more binder modifiers claim 1 , driers claim 1 , plasticizers claim 1 , fillers claim 1 , surfactants claim 1 , pigments or preservatives.5. A method for adsorbing volatile organic compounds (VOCs) derived from organic matter claim 1 , comprising applying a water-resistant compound to the volatile organic compounds claim 1 , wherein the water-resistant composition comprises:a) palladium doped hydrogen-ZSM-5, wherein the Si:Al ratio of the hydrogen-ZSM-5 is less than or equal to 200:1; andb) at least one water-soluble binder.6. The method according to claim 5 , wherein the Si:Al ratio of the hydrogen-ZSM-5 is less than or equal to 100:1.7. The method according to claim 5 , wherein the water-soluble binder is selected from the group consisting of at least one polyvinyl alcohol claim 5 , gum ...

MODIFIED ALKALI METAL NANOTITANATES FOR HYDROGEN SULFIDE ADSORPTION

A hydrogen sulphide adsorbent is formed from an alkali metal nanotitanate having a portion of the alkali metal cations exchanged with metal cations reactive with hydrogen sulphide, and heat treated. A method for producing the adsorbent includes the steps of mixing an alkali metal nanotitanate in powder form into an aqueous metal cation solution to produce a slurry, which is subsequently dehydrated to produce a powder, which is heat treated. A low temperature method for removing hydrogen sulphide from a gaseous mixture involves exposing the gaseous mixture to the aforementioned adsorbent, at a temperature less than 250° C. The adsorbent maintains a high adsorption capacity over a range of activation temperatures and humidity conditions. 1. A hydrogen sulphide adsorbent comprising an ETS zeolite comprising ion-exchanged metal cations reactive with hydrogen sulphide.2. The adsorbent of wherein the ETS zeolite comprises ETS-2 claim 1 , ETS-4 or ETS-10.3. The adsorbent of wherein the metal cations reactive with hydrogen sulphide comprises copper claim 1 , barium or zinc.4. The adsorbent of wherein the ETS zeolite comprises ETS-2 and the metal cation reactive with hydrogen sulphide comprises copper.5. The adsorbent of having an amorphous component with a copper to titanium atomic ratio of about 0.20 or greater.6. The adsorbent of having a specific surface area of about 180 m/g or greater.7. The adsorbent of heat treated in the range of about 100° C. to about 500° C.8. A method for producing a hydrogen sulphide adsorbent claim 4 , said method comprising the steps of:(a) mixing an ETS zeolite in powder form into an aqueous metal cation solution to produce a slurry and allowing for ion exchange;(b) dehydrating the slurry to produce a powder; and(c) heat treating the powder at less than about 500° C.9. The method of wherein the ETS zeolite comprises ETS-2 claim 8 , ETS-4 or ETS10. The method of wherein the metal cations reactive with hydrogen sulphide comprises copper claim 8 ...

ZEOLITE Y

Process for preparing a modified zeolite Y which process comprises subjecting zeolite Y having a silica to alumina molar ratio of at least 10 to calcination at a temperature of from 700 to 1000° C. wherein (i) the steam partial pressure is at most 0.06 bar at a temperature of from 700 to 800° C., (ii) the steam partial pressure is at most 0.08 bar at a temperature of from 800 to 850° C., (iii) the steam partial pressure is at least 0.03 bar at a temperature of from 850 to 900° C., and (iv) the steam partial pressure is at least 0.05 bar at a temperature of from 900 to 950° C. and (v) the steam partial pressure is at least 0.07 bar at a temperature of from 950 to 1000° C., a modified zeolite Y obtainable by such process, zeolite Y having a silica to alumina molar ratio of at least 10, the infrared spectrum of which has a peak at 3700 cmbut substantially no peaks at 3605 and 3670 cmand zeolite Y having a silica to alumina molar ratio of at least 10, which zeolite Y has an acidity as measured by exchange with perdeuterated benzene of at most 20 micromole/gram. 1. A process for preparing a modified zeolite Y which process comprises subjecting zeolite Y having a silica to alumina molar ratio of at least 10 to calcination at a temperature of from 700° C. to 1000° C. wherein (i) the steam partial pressure is at most 0.06 bar at a temperature of from greater than 700° C. to less than 800° C. , (ii) the steam partial pressure is at most 0.08 bar at a temperature of from greater than 800° C. to less than 850° C. , (iii) the steam partial pressure is at least 0.03 bar at a temperature of from greater than 850° C. to less than 900° C. , and (iv) the steam partial pressure is at least 0.05 bar at a temperature of from greater than 900° C. to less than 950° C. or (v) the steam partial pressure is at least 0.07 bar at a temperature of from greater than 950° C. to less than 1000° C.2. A process according to claim 1 , in which process the zeolite Y has a silica to alumina molar ...

ZEOLITE-CONTAINING ADSORBENT FOR SELECTIVE SEPARATION OF ISOMERS FROM AROMATIC HYDROCARBON MIXTURES, AND PRODUCTION AND USE OF SAME

The present invention relates to an improved adsorbent for separating para-xylene from a mixture of xylene isomers, characterized in that the adsorbent contains a barium-containing zeolite of the faujasite type whose exchangeable sites are occupied to an extent of at least 4.0% by magnesium ions. The present invention additionally relates to the production of the adsorbent and to the use thereof in the separation of para-xylene from a mixture of xylene isomers. 1. An Adsorbent for separating xylene isomers , comprising a support material containing a barium-containing zeolite of the faujasite type , characterized in that at least 4.0% of the exchangeable sites of the barium-containing faujasite are occupied by magnesium ions.2. An Adsorbent according to claim 1 , wherein the zeolite is a zeolite X.3. An Adsorbent according to claim 1 , wherein the support material is binder-free.4. An Adsorbent according to claim 1 , wherein the support material is present in spherical form.5. An Adsorbent according to claim 1 , wherein the Si/Al ratio of the zeolite is between 1.0 and 1.5 claim 1 , preferably between 1.15 and 1.25.6. An Adsorbent according to claim 1 , wherein at least 7.0% claim 1 , preferably at least 10.0% claim 1 , of the exchangeable sites are occupied by magnesium ions.7. An Adsorbent according to claim 1 , wherein the barium content is between 25.0% by weight and 36.0% by weight claim 1 , based on the mass of the adsorbent.8. A Process for producing an adsorbent for separating xylene isomers according to claim 1 , comprising the following steps:a) provision of a support material comprising a zeolite of the faujasite type,b) ion exchange of the support material from step a) with barium ions and magnesium ions in an aqueous medium,c) drying of the support material obtained after step b) to give an adsorbent,wherein at least 4.0% of the exchangeable sites of the barium-containing zeolite in the adsorbent obtained after step c) are occupied by magnesium ions.9. ...

ZEOLITE ADSORBENTS COMPRISING ZEOLITE EMT, PROCESS FOR PREPARING THE SAME AND USES THEREOF

The present invention relates to zeolite adsorbents based on agglomerated crystals of zeolite EMT comprising barium and/or potassium. These adsorbents find applications in the separation of aromatic C8 isomer fractions, especially of xylenes, in the separation of substituted toluene isomers, such as nitrotoluene, diethyltoluene and toluenediamine, and in the separation of cresols, and in the separation of polyhydric alcohols, such as sugars. 1. A zeolite adsorbent comprising zeolite EMT crystals and comprising barium and/or potassium , in which the total content of alkali metal or alkaline-earth metal ion oxides other than barium oxide BaO and potassium oxide KO is between 0 and 5% , limits included , relative to the total mass of the adsorbent.2. The zeolite adsorbent according to claim 1 , also comprising a non-zeolite phase.3. The zeolite adsorbent according to claim 1 , wherein the zeolite EMT crystals have an Si/Al atomic ratio of between 1.00 and 2.00 claim 1 , limits included.4. The zeolite adsorbent according to claim 1 , wherein the number-average diameter of the zeolite EMT crystals is between 5 nm and 1500 nm claim 1 , limits included.5. The zeolite adsorbent according to claim 1 , which also comprises crystals of at least one other zeolite claim 1 , selected from the group consisting of zeolites of FAU structure claim 1 , zeolites of LTA structure claim 1 , and zeolites of MFI structure.6. The zeolite adsorbent according to claim 5 , wherein the said at least one other zeolite is selected from the group consisting of zeolites of faujasite structure claim 5 , alone or as a mixture and wherein the mass fraction of zeolite EMT is between 1% and 50%.7. The zeolite adsorbent according to claim 1 , wherein the mass fraction of zeolite EMT is greater than 50% relative to the total weight of adsorbent.8. The zeolite adsorbent according to claim 1 , comprising zeolite phases of EMT-FAU intergrowth.9. The zeolite adsorbent according to claim 1 , wherein:the barium ...

Process for Nitrile Removal from Hydrocarbon Feeds

A process is described, such process comprising i) contacting a hydrocarbon feed with a heterogeneous catalyst under conditions suitable to hydrolyze nitriles present in the feed to form a nitrile hydrolysis product comprising ammonia, carboxylic acid and carboxylate salts or a mixture thereof; and ii) removing the nitrile hydrolysis product from the feed. In an embodiment, the hydrocarbon feed comprises olefins and is intended for use in an olefin oligomerization process.

Materials, methods, and devices for siloxane contaminant removal

Adsorbent materials are disclosed, along with filter elements containing the adsorbent materials methods of using adsorbents to remove siloxane contaminants from a gas stream. The method includes providing an adsorbent material that has been washed with an acid and passing a gas through the adsorbent material so as to reduce siloxane levels in the gas. A filter element for reducing siloxane levels in a gas includes a first adsorbent material, the first adsorbent material comprising an acid-washed adsorbent; and a second adsorbent material, the second adsorbent material comprising an acid-impregnated adsorbent.

METHOD FOR PREPARING ZEOLITE SSZ-35..test eDAN

A method for making zeolite SSZ-35 is disclosed using a N,N-dimethylazonanium cation as a structure directing agent.

Processes using improved rho adsorbent compositions

Disclosed herein are new processes for adsorbing oxygen using adsorbent compositions comprising RHO zeolites kinetically selective for oxygen. The RHO zeolites can be used in pressure swing adsorption processes for separating oxygen from oxygen containing streams, such as for, but not limited to, purifying a crude argon feed stream or separating oxygen from an air feed stream.

RHO ADSORBENT COMPOSITIONS, METHODS OF MAKING AND USING THEM

Disclosed herein are novel RHO zeolites useful as kinetically selective adsorbents for oxygen and/or nitrogen. The adsorbents can be used in pressure swing adsorption processes for selectively adsorbing oxygen and/or nitrogen from feed streams such as an air stream or crude argon stream. Also disclosed are novel methods of preparing RHO zeolites, including in particular mixed-cation RHO zeolites. 1. A RHO zeolite having a Si/Al ratio of from 3.2 to 4.5 and containing non-proton extra-framework cations , wherein the zeolite contains at most 1 proton per unit cell , and wherein the size , number and charge of the extra-framework cations that are present in the zeolite are such that 1 or fewer non-proton extra-framework cations per unit cell are required to occupy 8-ring sites.2. The zeolite of claim 1 , wherein the zeolite has a Si/Al ratio of from 3.6 to 4.2.3. The zeolite of claim 1 , wherein the non-proton extra-framework cations comprise Li claim 1 , Mg claim 1 , Mn claim 1 , Fe claim 1 , Co claim 1 , Ni claim 1 , Cu and/or Zn cations.4. The zeolite of claim 1 , wherein the non-proton extra-framework cations comprise Li and/or Zn cations.5. The zeolite of claim 4 , wherein said Land/or Zn cations make up the majority of the extra-framework cations that are present per unit cell.6. The zeolite of claim 4 , wherein said Land/or Zn cations make up at least 70% of the extra-framework cations that are present per unit cell.7. The zeolite of wherein said Land/or Zn cations make up at least 80% of the extra-framework cations that are present per unit cell.8. The zeolite of claim 1 , wherein the zeolite has a unit cell axis length of from 14.23 Å to 14.55 Å.9. The zeolite of claim 1 , wherein the zeolite has a unit cell axis length of from 14.23 Å to 14.50 Å.10. The zeolite of claim 1 , wherein the zeolite has a unit cell axis length of from 14.30 Å to 14.45 Å.11. The zeolite of claim 8 , wherein the zeolite is selected from LiZnRHO(3.9) claim 8 , LiZnHNaRHO(3.9) claim 8 ...

Carbon dioxide concentration apparatus and carbon dioxide supply method

Enhanced concentration of carbon dioxide, typically of carbon dioxide in the air, is advantageous in areas such as agriculture and horticulture involving raising of plants which utilize carbon dioxide for photosynthesis. Various carbon dioxide concentration apparatus have been developed, but the problems thereof are numerous. It is accordingly the purpose of the present invention to develop an adsorbent having exceptional adsorption of carbon dioxide, and to provide an apparatus for concentration of carbon dioxide in the air through the use thereof. Provided is a pressure swing concentration apparatus that uses ferrierite as the adsorbent, the ferrierite having been subjected to alkali treatment to give a pore diameter of 0.01-1 μm and a pore volume of 0.1 mL/g or above.

Polymer compositions containing zeolite for enhanced water adsorption

This invention relates generally to zeolites and polymer compositions with zeolites having enhanced adsorption capacity for adsorption of water, ammonia and other similar compounds. The invention is directed particularly to aluminosilicate zeolites, and methods for preparing zeolite entrained polymer compositions having enhanced water adsorption properties. This invention relates also to improved packaging materials with enhanced water adsorption properties incorporating the polymer compositions containing zeolites.

Materials, methods, and devices for siloxane contaminant removal

Adsorbent materials are disclosed, along with filter elements containing the adsorbent materials methods of using adsorbents to remove siloxane contaminants from a gas stream. The method includes providing an adsorbent material that has been washed with an acid and passing a gas through the adsorbent material so as to reduce siloxane levels in the gas. A filter element for reducing siloxane levels in a gas includes a first adsorbent material, the first adsorbent material comprising an acid-washed adsorbent; and a second adsorbent material, the second adsorbent material comprising an acid-impregnated adsorbent.

ZINC-CONTAINING ZEOLITES AS DESICCANTS, AND METHODS OF USING THE SAME

The present disclosure is directed to metal ion-containing zeolitic compositions, preferably transition metal ion-containing, more preferably zinc ion containing zeolitic compositions, that are useful for reversibly scavenging water from humid gaseous feed streams, including air, and method of making and using the same. In some embodiments, the compositions comprise zinc-ion-doped zeolites have LTA, FAU, or EMT topologies. 1. A metal ion-doped crystalline microporous aluminosilicate composition comprising:a three-dimensional aluminosilicate framework comprising at least one topology that is LTA, FAU, or EMT;{'sub': '2', 'wherein the crystalline microporous aluminosilicate contains metal ions positioned within the framework lattice, wherein exposure of the composition to a gas source having a total pressure in a range of from 50 kPa to 125 kPa, a COcontent in a range of 250 to 425 ppm, and a water content in a range of 5% to 95% relative humidity at a temperature ranging from 0° C. to 70° C., results in{'sub': '2', '(i) the composition adsorbing less COon a mmol per gram basis than does the corresponding crystalline microporous aluminosilicate composition that is not metal ion-doped when exposed to the same conditions; and'}(ii) the composition adsorbing from 0.5 to 200 water molecules per unit cell.2. The metal ion-doped crystalline microporous aluminosilicate composition of claim 1 , wherein the three-dimensional aluminosilicate framework has an LTA topology.3. The metal ion-doped crystalline microporous aluminosilicate composition of claim 1 , wherein the three-dimensional aluminosilicate framework has an FAU topology.4. The metal ion-doped crystalline microporous aluminosilicate composition of claim 1 , wherein the three-dimensional aluminosilicate framework has an EMT topology.5. The metal ion-doped crystalline microporous aluminosilicate composition of any one of claim 1 , wherein the metal ions are transition metal ions.6. The metal ion-doped crystalline ...

GAS-ADSORBING MATERIAL AND VACUUM INSULATION MATERIAL INCLUDING THE SAME

A gas-adsorbing material may increase gas barrier properties for a target gas by reducing a gas-adsorption rate while maintaining gas-adsorption performance. A vacuum insulation material may use the gas-adsorbing material. The gas-adsorbing material may include a gas-adsorbing composition including a copper ion exchanged ZSM-5-type zeolite having a silica to alumina ratio ranging from about 10 to 50 in a framework of zeolite. A ratio of dealuminization of the ZSM-5-type zeolite is at least about 15%, and the gas-adsorbing material is capable of adsorbing at least nitrogen. Furthermore, the gas-adsorbing material may include a calcinated body of a compressed article comprising a gas-adsorbing composition including a copper ion exchanged ZSM-5-type zeolite having a silica to alumina ratio ranging from about 10 to 50 in a framework of zeolite (where a ratio of dealuminization of the ZSM-5-type zeolite is at least about 15%) and a moisture-absorbing material. 1. A gas-adsorbing material having an adsorption performance for a target gas , comprising:a gas-adsorbing composition including a copper ion exchanged ZSM-5-type zeolite having a ratio of silica relative to alumina ranging from about 10 to about 50 in a framework of zeolite,wherein a ratio of dealuminization of the ZSM-5-type zeolite being greater than or equal to about 15%, andwherein the gas-adsorbing material has a capability of adsorbing at least nitrogen.2. A gas-adsorbing material having an adsorption performance for a target gas , comprising:a calcinated body of a compressed article comprising a gas-adsorbing composition including a copper ion exchanged ZSM-5-type zeolite having a ratio of silica relative to alumina ranging from about 10 to about 50 in a framework of zeolite, and a moisture-absorbing material,wherein a ratio of dealuminization of the ZSM-5-type zeolite in the calcinated body being greater than or equal to about 15%.3. The gas-adsorbing material of claim 1 , wherein a copper ion content of ...

MODIFIED ALKALI METAL NANOTITANATES FOR HYDROGEN SULFIDE ADSORPTION

A hydrogen sulphide adsorbent is formed from an alkali metal nanotitanate having a portion of the alkali metal cations exchanged with metal cations reactive with hydrogen sulphide, and heat treated. A method for producing the adsorbent includes the steps of mixing an alkali metal nanotitanate in powder form into an aqueous metal cation solution to produce a slurry, which is subsequently dehydrated to produce a powder, which is heat treated. A low temperature method for removing hydrogen sulphide from a gaseous mixture involves exposing the gaseous mixture to the aforementioned adsorbent, at a temperature less than 250° C. The adsorbent maintains a high adsorption capacity over a range of activation temperatures and humidity conditions. 1. A hydrogen sulphide adsorbent comprising an ETS zeolite comprising ion-exchanged metal cations reactive with hydrogen sulphide.2. The adsorbent of wherein the ETS zeolite comprises ETS-2 claim 1 , ETS-4 or ETS-10.3. The adsorbent of wherein the metal cations reactive with hydrogen sulphide comprises copper claim 1 , barium or zinc.4. The adsorbent of wherein the ETS zeolite comprises ETS-2 and the metal cation reactive with hydrogen sulphide comprises copper.5. The adsorbent of having an amorphous component with a copper to titanium atomic ratio of about 0.20 or greater.6. The adsorbent of having a specific surface area of about 180 m/g or greater.7. The adsorbent of heat treated in the range of about 100° C. to about 500° C.8. A method for producing a hydrogen sulphide adsorbent claim 4 , said method comprising the steps of:(a) mixing an ETS zeolite in powder form into an aqueous metal cation solution to produce a slurry and allowing for ion exchange;(b) dehydrating the slurry to produce a powder; and(c) heat treating the powder at less than about 500° C.9. The method of wherein the ETS zeolite comprises ETS-2 claim 8 , ETS-4 or ETS10. The method of wherein the metal cations reactive with hydrogen sulphide comprises copper claim 8 ...

ZINC-CONTAINING ZEOLITES FOR CAPTURE OF CARBON DIOXIDE FROM LOW-CO2 CONTENT SOURCES AND METHODS OF USING THE SAME

The present disclosure is directed to metal ion-containing zeolitic compositions, preferably transition metal ion-containing, more preferably zinc ion containing zeolitic compositions, that are useful for scavenging COfrom low-CO-content feed streams, including air, and method of making and using the same. In some embodiments, the compositions comprise zinc-ion-doped zeolites having AEI, AFX, or CHA topologies. 1. A metal ion-doped crystalline microporous aluminosilicate composition comprising:(a) a three-dimensional aluminosilicate framework containing α-cages with 8-MR openings that are sized to accommodate the molecular dimensions of carbon dioxide (3.3 Å);(b) the framework further comprising d6r (or D6MR) composite building blocks having 6-membered rings that face (are part of) or connect the α-cage of the framework;wherein the crystalline microporous aluminosilicate contains 1.2 to 8 metal ions per unit cell, wherein the ratio of metal ions to aluminum within the unit cell is from 0.33 to 0.85; andwherein the metal ion-doped crystalline microporous aluminosilicate composition adsorbs carbon dioxide when exposed to a gaseous mixture comprising carbon dioxide.2. The metal ion-doped crystalline microporous aluminosilicate composition of claim 1 , wherein the three-dimensional aluminosilicate framework has an AEI claim 1 , AFT claim 1 , AFX claim 1 , CHA claim 1 , EAB claim 1 , KFI claim 1 , LEV claim 1 , or SAS topology.3. The metal ion-doped crystalline microporous aluminosilicate composition of claim 2 , wherein the three-dimensional aluminosilicate framework has an AEI claim 2 , AFX claim 2 , or CHA topology.4. The metal ion-doped crystalline microporous aluminosilicate composition of claim 3 , wherein the three-dimensional aluminosilicate framework has an AEI topology.5. The metal ion-doped crystalline microporous aluminosilicate composition of claim 3 , wherein the three-dimensional aluminosilicate framework has an AFX topology.6. The metal ion-doped ...

Process for conditioning a container comprising a granular material

Process for conditioning a container including a granular material A enabling the adsorption of the nitrogen contained in a feed gas stream, including a step of injecting, into the container, a gas or a gas mixture G such that the adsorption capacity of the material A with respect to G is less than 10 Ncm 3 /g at 25° C. and 1 atm.

Mn+-EXCHANGED BETA ZEOLITE, GAS ADSORBENT COMPRISING SAME, METHOD FOR PRODUCING SAME, AND METHOD FOR REMOVING NITROGEN MONOXIDE

Provided are: a M-exchanged beta zeolite which is useful for the catalytic removal of nitrogen monoxide contained in a gas to be purified even when oxygen is contained in the gas at a high concentration or when the gas has a low temperature; and a method for producing the M-exchanged beta zeolite. The M-exchanged beta zeolite according to the present invention has a SiO/AlOratio of 7 to 18, and is ion-exchanged by a M ion (wherein M represents a n-valent metal cation; n represents a numeral value of 1 to 3; and M represents an element selected from the group consisting of Ni, Co, Cu, Mn, Zn, Sn, Ag, Li, K, Cs, Au, Ca, Mg, Pt, Pd, Rh and Ir). The amount of the M ion carried on the M-exchanged beta zeolite is preferably from 0.01 to 2.5 mmol/g relative to the amount of the M-exchanged beta zeolite. 19-. (canceled)10. An M-exchanged beta zeolite which has been ion-exchanged with an M ion (wherein M represents an n-valent metal cation; n represents a numerical value of 1 to 3; and M represents an element selected from the group consisting of Ni , Co , Cu , Mn , Zn , Sn , Ag , Li , K , Cs , Au , Ca , Mg , Pt , Pd , Rh and Ir) , in which:{'sub': 2', '2', '3, 'sup': 2', '2', '3, 'SiO/AlOratio ranges from 7 to 18; a BET specific surface area ranges from 400 to 700 m/g; a micropore specific surface area ranges from 290 to 500 m/g; and a micropore volume ranges from 0.15 to 0.25 cm/g.'}11. The M-exchanged beta zeolite according to claim 10 , wherein the amount of the M ion relative to the amount of the M-exchanged beta zeolite ranges from 0.01 to 2.5 mmol/g.12. The M-exchanged beta zeolite according to claim 10 , wherein a beta zeolite claim 10 , in which an SiO/AlOratio ranges from 7 to 18 claim 10 , a BET specific surface area that is measured in the form of a sodium-type beta zeolite ranges from 400 to 700 m/g claim 10 , a micropore specific surface area that is measured in the form of a sodium-type beta zeolite ranges from 250 to 500 m/g claim 10 , and a micropore volume ...

Water-resistant composition

The present invention provides a water-resistant composition for adsorbing volatile organic compounds (VOCs) derived from organic matter including: a) palladium doped hydrogen-ZSM-5, wherein the Si:AI ratio of the hydrogen-ZSM-5 is less than or equal to 200:1; and b) at least one water-soluble binder. The invention also provides a method for using the water-resistant composition for adsorbing volatile organic compounds (VOCs) derived from organic matter.

CARBON DIOXIDE ADSORBENTS

A carbon dioxide adsorbent including a hierarchical zeolite. The hierarchical zeolite defines micropores having a pore width between about 0.4 nm and about 2 nm, and at least one of: mesopores having a pore width between about 2 nm and about 50 nm; and macropores having a pore width greater than about 50 nm. 130.-. (canceled)31. A method of removing carbon dioxide from a gas stream comprising carbon dioxide , the method comprising:contacting a first gas stream comprising carbon dioxide with a carbon dioxide adsorbent comprising a hierarchical zeolite; andadsorbing carbon dioxide from the first gas stream onto the carbon dioxide adsorbent, thereby removing some of the carbon dioxide from the first gas stream to yield a second gas stream, wherein the second gas stream has a lower concentration of carbon dioxide than the first gas stream,wherein the hierarchical zeolite defines:micropores having a pore width between about 0.4 nm and about 2 nm; andat least one of:mesopores having a pore width between about 2 nm and about 50 nm; andmacropores having a pore width greater than about 50 nm.32. The method of claim 31 , comprising desorbing at least some of the carbon dioxide from the carbon dioxide adsorbent to yield a third gas stream comprising desorbed carbon dioxide.33. The method of claim 32 , wherein desorbing at least some of the carbon dioxide from the carbon dioxide adsorbent comprises changing the gas pressure on the carbon dioxide adsorbent claim 32 , the temperature of the carbon dioxide adsorbent claim 32 , or both.34. The method of claim 32 , wherein the carbon dioxide adsorption capacity of the carbon dioxide adsorbent after desorbing at least some of the carbon dioxide from is at most about 15% less claim 32 , at most about 10% less claim 32 , or at most about 5% less than the initial equilibrium adsorption capacity of the carbon dioxide adsorbent before contacting the first gas stream with the carbon dioxide adsorbent.35. The method of claim 32 , wherein ...

Process for the removal of mercury from hydrocarbon streams containing oxygen

The invention relates to a process for removing and recovering mercury, an impurity, from a hydrocarbon feedstream containing oxygen, such as introduced during hydraulic fracturing. Mercury is selectively removed to very low levels of concentration from fluid streams such as natural gas, cracked gas, hydrogen or naphtha by passage of the stream through an adsorbent bed containing particles of a zeolitic molecular sieve preferably having pore diameters of at least 3.0 angstroms and in which the zeolite crystallites are formed into an aggregate (cylindrical or beads) which contain ionic or elemental silver. These adsorbent particles maintain their capacity for removal of mercury despite the presence of oxygen.

ZEOLITE TYPE A SORBENT

The present invention relates to a zeolite type A, a method for preparing the zeolite type A, use of the zeolite type A for separating carbon dioxide from a composition comprising hydrocarbons, and a process for separating carbon dioxide from a gas composition using the zeolite type A. The zeolite type A comprising, based on total amount of exchangeable ions, less than 10% of potassium ions, less than about 10% of a second group of ions consisting of cesium ions, rubidium ions and mixtures thereof, and from about 80% up to about 90% of a third group of ions consisting of sodium ions, lithium ions and mixtures thereof 1. A zeolite type A comprising , based on total amount of exchangeable ions , less than 10% of potassium ions , less than about 10% of a second group of ions consisting of cesium ions , rubidium ions and mixtures thereof , and from about 80% up to about 90% of a third group of ions consisting of sodium ions , lithium ions and mixtures thereof.2. The zeolite type A according to claim 1 , comprising less than about 9% of potassium ions.3. The zeolite type A according to claim 1 , comprising less than about 8% of potassium ions.4. The zeolite type A according to claim 1 , comprising from about 6% to 10% of potassium ions claim 1 , from about 6% to about 10% of second group of ions consisting of cesium ions claim 1 , rubidium ions and mixtures thereof claim 1 , and from about 80% up to about 90% of a third group of ions consisting of sodium ions claim 1 , lithium ions and mixtures thereof.5. The zeolite type A according to claim 1 , wherein the second group of ions is cesium ions.6. The zeolite type A according to claim 1 , wherein the third group of ions is sodium ions.7. A method for preparing the zeolite type A according to claim 1 , comprising providing a zeolite type A structure and subjecting said zeolite type A zeolite to ion exchange.8. Use of the zeolite type A according to for separating carbon dioxide from a composition comprising hydrocarbons.9. ...

PACKAGING FILMS

A packaging film is described comprising at least one polymer film layer in which particles of a small-pore or a medium-pore palladium-doped zeolite are dispersed. Such films are of particular utility for the adsorption of volatile organic compounds, such as those originating from organic matter. 1. A packaging film for the adsorption of volatile organic compounds comprising at least one polymer film layer , wherein particles of a small-pore or a medium-pore palladium-doped zeolite are dispersed in the polymer film layer.2. The packaging film according to wherein the polymer film layer comprises a polymer selected from an ethylene vinyl acetate co-polymer claim 1 , a low-density polyethylene claim 1 , a polypropylene claim 1 , or a high impact polystyrene.3. (canceled)4. The packaging film according to wherein the zeolite has a framework type that is chabazite.5. (canceled)6. (canceled)7. (canceled)8. (canceled)9. (canceled)10. (canceled)11. (canceled)12. (canceled)13. (canceled)14. (canceled)15. The packaging film according to wherein the polymer film layer comprises 1 to 10 wt % of said palladium-doped zeolite.16. The packaging film according to wherein said palladium-doped zeolite comprises 0.2 to 2 wt % palladium based on the total weight of said palladium-doped zeolite.17. The packaging film according to wherein the polymer film layer has a thickness of 5 to 30 μm.18. The packaging film according to wherein the palladium-doped zeolite particles have a particle size (d50) between 5 and 10 μm.19. The packaging film according to consisting essentially of the polymer film layer.20. The packaging film according to comprising a gas permeable barrier layer.21. A packaging structure comprising a film according to .22. (canceled)23. (canceled)24. A method of adsorbing volatile organic compounds originating from organic matter using a packaging film according to .25. The method according to wherein the volatile organic compound is ethylene.26. The packaging film as ...

Fe(II)-SUBSTITUTED MEL-TYPE ZEOLITE, PRODUCTION METHOD THEREFOR AND GAS ADSORBENT INCLUDING SAME, AND NITRIC OXIDE AND HYDROCARBON REMOVAL METHOD

The purpose of/problem addressed by the present invention is to provide: an Fe(II)-substituted MEL-type zeolite useful for the catalytic removal of a variety of gases; and a production method therefor. The SiO 2 /Al 2 O 3 ratio in this Fe(II)-substituted MEL-type zeolite is in the range of 10-30 inclusive. This Fe(II)-substituted MEL-type zeolite is obtained by being subjected to ionic exchange with Fe(II) ions. It is preferable that the Fe(II) loading amount be in the range of 0.001-0.4 mmol/g of the Fe(II)-substituted MEL-type zeolite. It is preferable that the Fe(II)-substituted MEL-type zeolite be produced using a method in which an MEL-type zeolite having an SiO 2 /Al 2 O 3 ratio in the range of 10-30 inclusive is dispersed in an Fe(II) water-soluble-compound aqueous solution, and then mixed and agitated to cause the MEL-type zeolite to carry Fe(II) ions.

ZEOLITIC ADSORBENTS WITH LARGE EXTERNAL SURFACE AREA, PROCESS FOR PREPARING THEM AND USES THEREOF

The present invention relates to zeolitic adsorbents based on agglomerated crystals of FAU zeolite containing barium and/or potassium, with large external surface area, combining optimum properties in terms of selectivity and mechanical strength. These adsorbents find applications in the separation of cuts of C8-aromatic isomers and notably of xylenes, in the separation of isomers of substituted toluene such as nitrotoluene, diethyltoluene, toluenediamine, in the separation of cresols, and in the separation of polyhydric alcohols such as sugars. 1. A method for separating para-xylene from cuts of aromatic isomers with 8 carbon atoms , using , as an agent for adsorption of para-xylene , a zeolitic adsorbent comprising at least one FAU zeolite and comprising at least one of barium and potassium , wherein the external surface area of said zeolitic adsorbent , measured by nitrogen adsorption , is greater than 20 m·g , said method comprising:contacting aromatic isomers with 8 carbon atoms with said zeolitic adsorbent; andadsorbing para-xylene.2. A method according to claim 1 , wherein the method is in the liquid phase claim 1 , and wherein adsorbing para-xylene is performed in the presence of a desorbent.3. A method according to claim 2 , wherein the desorbent is selected from the group consisting of toluene and para-diethylbenzene.4. A method according to claim 1 , wherein the method is a simulated moving-bed method.5. A method according to claim 1 , wherein the method is a simulated countercurrent moving-bed method.6. A method according to claim 1 , wherein the zeolitic adsorbent has a content of barium oxide (BaO) above 10% relative to the total weight of the zeolitic adsorbent and a barium content between 23% and 42% claim 1 , inclusive claim 1 , by weight relative to the total weight of the zeolitic adsorbent.7. A method according to claim 1 , wherein the zeolitic adsorbent has a content of potassium oxide KO below 25% by weight relative to the total weight of the ...

ADSORBENT COMPOSITION FOR ARGON PURIFICATION

An optimal material composition that allows for the purification of at least one feed component from a fluid feed stream such that the adsorbent has an oxygen capacity of at least 10 weight percent is described. More specifically, the material is an adsorbent for purification of a fluid feed stream having an oxygen to argon selectivity greater than or equal to a ratio of 3:1 and an oxygen capacity of greater than or equal to 10 weight percent, wherein the oxygen capacity is measured at a pressure in the range of about 9-10 Torr and a temperature of 77 degrees Kelvin after 4 hours of equilibration time and wherein the oxygen to argon selectivity is obtained by dividing the oxygen capacity by the argon capacity of the adsorbent measured at a pressure in the range of about 697-700 Torr and a temperature of 87 degrees Kelvin after 8 hours of equilibration time. The adsorption capacities are measured on a pure component basis. 1. A material for purification of a fluid feed stream comprising: an adsorbent having an oxygen to argon selectivity greater than or equal to a ratio of 3:1 and an oxygen capacity of greater than or equal to 10 weight percent , wherein said oxygen capacity is measured at a pressure in the range of about of about 9-10 Torr and a temperature of 77 degrees Kelvin after 4 hours of equilibration time and wherein said oxygen to argon selectivity is obtained by dividing said oxygen capacity by said argon capacity of said adsorbent measured at a pressure in a range of about 697-700 Torr and a temperature of 87 degrees Kelvin after 8 hours of equilibration time.2. The material of claim 1 , wherein said oxygen to argon selectivity is greater than or equal to a ratio of 7:1.3. The material of claim 1 , wherein said fluid feed stream is a liquid feed stream.4. The material of claim 1 , wherein said adsorbent has an oxygen capacity of greater than or equal to 15 weight percent.5. The material of claim 1 , wherein said adsorbent has an argon capacity of less ...

ZEOLITE ADSORBENT IN THE FORM OF LOW-TORTUOSITY AGGLOMERATES

Provided is a zeolite-based adsorbent in the form of agglomerates, where the adsorbent having a tortuosity factor, calculated from the pore distribution determined by mercury intrusion porosimetry, of greater than 1 and less than 3. The adsorbent also has a porosity as determined by mercury intrusion porosimetry of between 25% and 35%. The adsorbent is useful in the field of separations in particular in a process for separating para-xylene from aromatic hydrocarbon isomer fractions containing 8 carbon atoms. 2. The zeolite-based adsorbent as claimed in claim 1 , in which the tortuosity factor t is between 1.5 and 2.7.3. The zeolite-based adsorbent as claimed in claim 1 , wherein the high mechanical bulk crushing strength (BCS) claim 1 , measured via the Shell method series SMS1471-74 adapted for agglomerates less than 1.6 mm in size claim 1 , is greater than or equal to 1.0 MPa.4. The zeolite-based adsorbent as claimed claim 1 , wherein said adsorbent has a size of between 0.1 mm and 1 mm claim 1 , limits inclusive.5. The zeolite-based adsorbent as claimed in claim 1 , wherein claim 1 , said adsorbent comprises a zeolite chosen from the zeolites of FAU structure.6. The zeolite-based adsorbent as claimed in claim 5 , said zeolite being zeolite X claim 5 , alone or as a mixture with other zeolites.7. The zeolite-based adsorbent as claimed in claim 1 , wherein claim 1 , said adsorbent comprising more than 90% by weight of zeolite(s).8. The zeolite-based adsorbent as claimed in claim 1 , wherein said zeolite(s) are in the form of crystals between 10 nm and 1500 nm in size.10. The zeolite-based adsorbent as claimed in claim 1 , further comprising barium and/or potassium.11. A process for preparing a zeolite-based adsorbent as claimed in claim 1 , comprising at least following steps:a) a step of mixing crystals of at least one zeolite with an agglomeration binder containing at least 80 of zeolitizable clay, and optionally a source of silica, followed by forming and a ...

Adsorptive Removal of Perfluorinated or Partially Fluorinated Surfactants

The invention relates to methods for recovering a fluorinated surfactant molecule from an aqueous or mixed aqueous organic solution, comprising the step of contacting said solution containing a fluorinated surfactant with a zeolite that has pores delineated by rings that comprise between 10 to 14 tetrahedrally coordinated framework atoms (‘T’). 1. A method for recovering a fluorinated surfactant from an aqueous or mixed aqueous organic solution containing the fluorinated surfactant , the method comprising:{'sup': 4+', '4+', '4+', '4+', '4+', '4+, 'contacting the solution with a zeolite having tetrahedrally coordinated framework atoms and pores, the pores being delineated by rings that comprise from 10 to 14 of the tetrahedrally coordinated framework atoms, the tetrahedrally coordinated framework atoms being selected from the group consisting of Si, Ge, Ti, Sn, Zr, and Hf.'}2. The method according to claim 1 , wherein the zeolite framework is non-charged and non-polar.3. (canceled)4. The method according to claim 1 , wherein all tetrahedrally coordinated framework atoms of the zeolite are Si.5. The method according to claim 1 , wherein the zeolite has at least one type of pore delineated by 12-membered rings.6. The method according to claim 1 , wherein the zeolite has a framework topology selected from the group consisting of AFI claim 1 , *BEA claim 1 , BEC claim 1 , CON claim 1 , EMT claim 1 , FAU claim 1 , IFR claim 1 , ISV claim 1 , IWW claim 1 , MEI claim 1 , MOR claim 1 , MOZ claim 1 , MSE claim 1 , MTW claim 1 , *STO claim 1 , UOV claim 1 , UTL claim 1 , and YFI.7. The method according to claim 1 , wherein the fluorinated surfactant is selected from the group consisting of a linear perfluorinated alkylcarboxylic acid claim 1 , a branched perfluorinated alkylcarboxylic acid claim 1 , and a partially fluorinated alkylcarboxylic acid claim 1 , wherein optionally one or more fluorinated alkyl groups of the fluorinated surfactant are substituted with a fluorinated ...

REMOVAL OF FEED TREATMENT UNITS IN AROMATICS COMPLEX DESIGNS

Processes and apparatuses for producing para-xylenes are provided. The processes comprises providing a reformate stream comprising aromatic hydrocarbons to a reformate splitter to provide a reformate bottoms stream and a reformate overhead stream. A portion of the reformate bottoms stream is passed to a para-xylene separation unit for separating para-xylene, wherein the portion of the reformate bottoms stream is passed to the para-xyelene separation unit without an intermediate step for removal of olefins. 1. A process for the production of para-xylene , wherein the process comprises:{'sub': 7+', '7−, 'a) providing a reformate stream comprising aromatic hydrocarbons to a reformate splitter to provide a reformate bottoms stream comprising C aromatic hydrocarbons and a reformate overhead stream comprising C aromatic hydrocarbons; and'}b) passing a portion of the reformate bottoms stream to a para-xylene separation unit for separating para-xylene, wherein said portion is contacted with an adsorbent under adsorption conditions to provide a xylene extract stream comprising para-xylene and a raffinate product stream,wherein the portion of the reformate bottoms stream is passed to the para-xyelene separation unit without an intermediate step for removal of olefins.2. The process of further comprising passing the reformate bottoms stream to a xylene fractionation column without the intermediate step for removal of olefins to produce a xylene fractionator bottoms stream rich in Cand heavier alkylaromatic hydrocarbons and an overhead xylene stream comprising the portion of the reformate bottoms stream.3. The process of claim 1 , wherein the intermediate step comprises a clay treater.4. The process of claim 1 , wherein the intermediate step comprises an olefin reduction process (ORP) unit.5. The process of claim 1 , wherein the said adsorbent is a binderless adsorbent comprising zeolite X having an average crystallite size of less than 1.8 microns.6. The process of claim 5 , ...

Synthesis of zsm-58 crystals with improved diffusivity for use in gas separations

Methods are provided for synthesizing ZSM-58 crystals with an improved morphology and/or an improved size distribution. By controlling the conditions during synthesis of the ZSM-58 crystals, crystals of a useful size with a narrow size distribution can be generated. Additionally, by controlling the ratio of water content to silica content in the synthesis mixture, it has unexpectedly been found that ZSM-58 crystals can be formed with an improved morphology. The improved morphology can result in ZSM-58 crystals with a more uniform size across the various dimensions of the crystal, which allows for more uniform diffusion within the crystal. This is in contrast to conventionally synthesized crystals, where the size of the crystal can vary along different axes of the crystals.

METHOD FOR PREPARING A HIGH-PURITY AFX STRUCTURAL ZEOLITE WITH A NITROGEN-CONTAINING ORGANIC STRUCTURING AGENT

The invention relates to a process for preparing an AFX-structure zeolite comprising at least the following steps: 1. A process for preparing an AFX-structure zeolite comprising at least the following steps:{'sub': 2 (FAU)', '2', '3 (FAU), 'i) mixing, in an aqueous medium, an FAU-structure zeolite having an SiO/AlOmolar ratio of between 2.00 (limit included) and 6.00 (limit excluded), an organic nitrogenous compound R, R being chosen from'}1,5-bis(methylpiperidinium)pentane dihydroxide,1,6-bis(methylpiperidinium)hexane dihydroxide or1,7-bis(methylpiperidinium)heptane dihydroxide, at least one source of at least one alkali and/or alkaline-earth metal M of valency n, n being an integer greater than or equal to 1, being chosen from lithium, potassium, sodium, magnesium and calcium and a mixture of at least two of these metals, the reaction mixture having the following molar composition:{'sub': 2 (FAU)', '2', '3 (FAU), '(SiO)/(AlO) between 2.00 (limit included) and 6.00 (limit excluded), preferably between 3.00 (limit included) and 6.00 (limit excluded)'}{'sub': 2', '2 (FAU), 'HO/(SiO) between 1 and 100, preferably between 5 and 60'}{'sub': '2 (FAU)', 'R/(SiO) between 0.01 and 0.6, preferably between 0.05 and 0.5'}{'sub': 2/n', '2 (FAU), 'MO/(SiO) between 0.005 and 0.7, preferably between 0.05 and 0.6, limits included,'}{'sub': 2 (FAU)', '2', '2', '3 (FAU)', '2', '3, 'in which SiOdenotes the amount of SiOprovided by the FAU zeolite and AlOdenotes the amount of AlOprovided by the FAU zeolite, until a homogeneous precursor gel is obtained;'}ii) hydrothermal treatment of said precursor gel obtained on conclusion of step i) at a temperature of between 120° C. and 220° C., for a time of between 12 hours and 15 days.2. The process as claimed in claim 1 , in which R is 1 claim 1 ,6-bis(methylpiperidinium)hexane dihydroxide.3. The process as claimed in claim 1 , in which M is sodium.4. The process as claimed in claim 3 , in which the source of at least one alkali and/or ...

ZEOLITE MATERIAL BASED ON MESOPOROUS ZEOLITE

The present invention relates to zeolite materials in the form of agglomerates comprising at least one mesoporous zeolite and having both the characteristics of mesoporous zeolites, the properties associated with microporosity and the mechanical properties of zeolite agglomerates without mesoporous zeolite. 1. An agglomerated zeolite material comprising at least one mesoporous zeolite and optionally one or more non-mesoporous zeolites , the said agglomerated zeolite material having at least the following characteristics:a total zeolite content of at least 70% by weight relative to the total weight of the agglomerated zeolite material,a content of mesoporous zeolite(s) of greater than or equal to 30%,a binder content, after calcinations performed at 950° C. for 1 hour, of less than or equal to 30%,a mean volume diameter (D50), or a length (largest dimension when the material is not spherical) of less than or equal to 7 mm, and eitheri) a bulk crushing strength (BCS) measured according to standard ASTM 7084-04 of between 0.5 MPa and 3 MPa, for a material with a mean volume diameter (D50), or a length (largest dimension when the material is not spherical), of less than 1 mm, limits inclusive, orii) a grain crushing strength, measured according to standards ASTM D 4179 (2011) and ASTM D 6175 (2013), of between 0.5 daN and 30 daN for a material with a mean volume diameter (D50), or a length (largest dimension when the material is not spherical), of greater than or equal to 1 mm, limits inclusive.2. The agglomerated zeolite material according to claim 1 , also having an apparent mass per unit volume of between 0.4 g·cmand 1 g·cm claim 1 , limits inclusive.3. The agglomerated zeolite material according to claim 1 , in which said mesoporous zeolite is selected from the group consisting of mesoporous zeolites of LTA claim 1 , EMT and FAU structure with an Si/Al atomic ratio of between 1 and 1.4 claim 1 , limits inclusive.4. The agglomerated zeolite material according to ...

RADIOACTIVE IODINE ADSORBENT, AND METHOD FOR TREATING RADIOACTIVE IODINE

Provided is a method for treating radioactive iodine contained in steam discharged from a nuclear power facility, including a filling step of filling an air-permeable container with a granulated radioactive iodine adsorbent of zeolite X, wherein ion exchange sites of the zeolite X are substituted with silver so that a size of minute pores of the zeolite X is suited to a size of a hydrogen molecule, and the radioactive iodine adsorbent has a silver content of 36 wt % or more when dried, a particle size of 10×20 mesh, a hardness of 94% or more, and a water content of 12 wt % or less when dried at 150° C. for 3 h and thereby reduced in weight; and a flow passing step of passing a flow of the steam discharged from the nuclear power facility, through the container filled with the radioactive iodine adsorbent. 2. The method of claim 1 , whereinthe steam discharged from the nuclear power facility contains hydrogen molecules.3. The method of claim 1 , whereinthe steam discharged from the nuclear power facility is superheated steam having a temperature of 100° C. or more.4. The method of claim 1 , whereinin the filling step, the filling density of the radioactive iodine adsorbent is adjusted to 1.0 g/ml or more.5. The method of claim 1 , whereinin the flow passing step, a period of time for which the steam is retained in the container filled with the radioactive iodine adsorbent is set to 0.06 sec or more.6. The method of claim 1 , whereinin the flow passing step, the steam has a pressure of 399 kPa or more.7. The method of claim 1 , whereinin the flow passing step, the container filled with the radioactive iodine adsorbent has a humidity of 95% or more.8. A method for treating radioactive iodine contained in steam discharged from a nuclear power facility claim 1 , comprising:a filling step of filling an air-permeable container with a radioactive iodine adsorbent of zeolite X, whereinion exchange sites of the zeolite X are substituted with silver so that a size of minute ...

METHOD FOR THE PREPARATION OF SYNTHETIC CRYSTALLINE ZEOLITE MATERIALS WITH ENHANCED PORE VOLUME

The present invention relates to a method for the preparation of a synthetic crystalline zeolite material, to said synthetic crystalline zeolite material, and to the uses of said method and said synthetic crystalline zeolite material in various applications. 1. A method for the preparation of a synthetic crystalline zeolite material comprising micropores and eventually mesopores , said synthetic crystalline zeolite material having a silicon to aluminum molar ratio Si/Al≥1 and , wherein said method comprises at least the following steps:{'sub': 4', '4', '4, '1) a step of contacting a NHF solution with a dry starting crystalline zeolite material at a temperature ranging from 0° C. to 100° C., said NHF solution having a NHF mass concentration of at least 15 wt % and said starting crystalline zeolite material being essentially microporous and having a silicon to aluminum molar ratio Si/Al≥1;'}2) a washing step;3) a drying step at a temperature ranging from 25° C. to 120° C., for 1 h to 24 h, to recover said synthetic crystalline zeolite material.2. The method according to claim 1 , wherein step 1) is carried out for a time ranging from 5 to 180 minutes.3. The method according to claim 1 , wherein the pH of the NHF solution before step 1) is 7.4. The method according to claim 1 , wherein the mass ratio of solid NHF/starting crystalline zeolite material used in step 1) ranges from 0.5 to 25.5. The method according to claim 1 , wherein it further comprises a step 4) of ion exchanging.6. The method according to claim 1 , wherein the NHF solution used in step 1) has a NHF mass concentration of at least 20 wt %.7. The method according to claim 1 , wherein it leads to an increase of the total pore volume of at least 15% claim 1 , with respect to the total pore volume of the starting crystalline zeolite material.8. The method according to claim 1 , wherein step 1) is carried out by contacting the starting crystalline zeolite material with the whole NHF solution in only one go ...

Reusable porous Na(Si2Al)O6.xH2O/NiFe2O4 structure for selective removal of heavy metals from waste waters

The 3-Glycidoxypropyltrimethoxysilane (GPTMS) decorated magnetic more-aluminosilicate shell Na(SiAl)O.xHO/NiFeOstructures were hydrothermally prepared and were well characterized by different analysis methods. The XRD patterns were truly proved the formation of the aluminosilicate layer on the surface of the magnetic cores. In addition to the TGA curve which implied on the presence of the GPTMS organic segment, nitrogen adsorption-desorption isotherms demonstrated that the final sample has high specific surface area. The products were incredibly able to remove the toxic lead and cadmium ions from the wastewaters. Furthermore, the mechanism of the sorption and the role of GPTMS in enhancing the sorption capacity of the structures were comprehensively discussed. 1- A method of making a high capacity reusable magnetic core-aluminosilicate shell sorbent for selective purification of wastewaters containing heavy metal ions , comprising the steps of:{'sub': 3', '2', '3, 'sup': 2+', '3+, 'a) preparing 50 ml transparent solution containing Ni(NO)and FeCl(corresponding to Ni/Fe molar ratio of 1:2);'}b) adding said transparent solution to NaOH solution 2 M drop by drop under vigorous stirring;c) adding a mixture containing sufficient amount of EG and TMAOH the solution of step b, above suspension drop wise;d) Stirring the above combined mixture in step c for 2 hrs, then immediately transferring it into an autoclave and keeping it at 200° C. for 8 hrs;e) Collecting black solid particles by an external magnet, repeatedly washing said particles with de-ionized water, and drying them at 80° C. for 6 hrs.2- The method of claim 1 , further comprising the steps of preparing Na(SiAl)O.xHO/NiFeOparticles as follows:{'sub': 3', '3', '2, 'f) dissolving Al(NO).9HO in 30 mL of NaOH 2 M containing 0.9 g of cetyl trimethylammonium bromide (CTAB) and 5.05 mL of tetraethyl orthosilicate (TEOS);'}g) then magnetically stirring it for 90 min;h) Dispersing Magnetic particles (1.0 g) of the above ...

ZEOLITE ADSORBENTS, PREPARATION PROCESS THEREFOR AND USES THEREOF

The present invention relates to zeolite adsorbents based on agglomerated zeolite X crystals comprising barium, potassium and sodium. These adsorbents find applications in the separation of aromatic C8 isomer fractions and especially xylene. 1. A zeolite adsorbent comprising zeolite X crystals and comprising barium , potassium and sodium , in which the KO/(KO+BaO+NaO) mole ratio is between 8.0% and 8.6%.2. The zeolite adsorbent according to claim 1 , further comprising a non-zeolite phase.3. The zeolite adsorbent according to claim 1 , in which the content of sodium oxide NaO is less than 0.3% by weight relative to the total mass of the adsorbent.4. The zeolite adsorbent according to claim 1 , in which the total content of alkali metal or alkaline-earth metal ion oxides other than barium oxide BaO claim 1 , potassium oxide KO and sodium oxide NaO is less than 1% by weight relative to the total mass of the adsorbent.5. The zeolite adsorbent according to claim 1 , in which the zeolite X crystals have an Si/Al atomic ratio of between 1.00 and 1.50.6. The zeolite adsorbent according to claim 1 , having a number mean diameter of between 0.2 mm and 2 mm.7. The zeolite adsorbent according to claim 1 , in which the number mean diameter of the zeolite X crystals is less than or equal to 1.5 μm.8. The zeolite adsorbent according claim 1 , having a loss on ignition claim 1 , measured at 950° C. according to standard NF EN 196-2 claim 1 , of between 4.0% and 7.7% by weight.9. The zeolite adsorbent according claim 1 , in which the mass fraction of zeolite X is at least 80% by weight relative to the total weight of the adsorbent.10. A process for preparing an adsorbent according to claim 1 , comprising at least the steps of:a) agglomerating zeolite X crystals with a binder, and forming agglomerate, followed by drying and calcination,b) optional zeolitization of the binder,c) cation exchange of the agglomerate by placing in contact with a solution of barium ions, or of potassium ...

ZEOLITE ADSORBENTS, PREPARATION PROCESS THEREFOR AND USES THEREOF

The present invention relates to zeolite adsorbents based on agglomerated zeolite X crystals comprising barium, potassium and sodium. These adsorbents find applications in the separation of aromatic C8 isomer fractions and especially xylene. 1. A zeolite adsorbent comprising zeolite X crystals and comprising barium , potassium and sodium , in which the KO/(KO+BaO+NaO) mole ratio is between 9.5% and 14.5%.2. The zeolite adsorbent according to claim 1 , further comprising a non-zeolite phase.3. The zeolite adsorbent according to claim 1 , in which the content of sodium oxide NaO is less than 0.3% by weight relative to the total mass of the adsorbent.4. The zeolite adsorbent according to claim 1 , in which the total content of alkali metal or alkaline-earth metal ion oxides other than barium oxide BaO claim 1 , potassium oxide KO and sodium oxide NaO is less than 1% by weight relative to the total mass of the adsorbent.5. The zeolite adsorbent according to claim 1 , in which the zeolite X crystals have an Si/Al atomic ratio of between 1.00 and 1.50.6. The zeolite adsorbent according to claim 1 , having a number mean diameter of between 0.2 mm and 2 mm.7. The zeolite adsorbent according to claim 1 , in which the number mean diameter of the zeolite X crystals is less than or equal to 1.5 μm.8. The zeolite adsorbent according to claim 1 , having a loss on ignition claim 1 , measured at 950° C. according to standard NF EN 196-2 claim 1 , of between 4.0% and 7.7% by weight.9. The zeolite adsorbent according to claim 1 , in which the mass fraction of zeolite X is at least 80% by weight of zeolite(s) X relative to the total weight of the adsorbent.10. A process for preparing an adsorbent according to claim 1 , comprising at least the steps of:a) agglomerating zeolite X crystals with a binder, and forming, followed by drying and calcination,b) optional zeolitization of the binder,c) cation exchange of the agglomerate by placing in contact with a solution of barium ions, or of ...

Method for producing a dehydrated liquid organic carbonate mixture

The present invention relates in a first aspect to a method for producing in the interior of a production equipment a dehydrated liquid mixture for use as a solvent for a conducting salt (e.g. LiPF 6 ) wherein after cleaning the equipment with isopropyl alcohol and providing or preparing a liquid starting mixture in said interior of the production equipment both the isopropyl alcohol content in the mixture and the water content in the mixture is reduced by interaction with a zeolite molecular sieve.

Zeolite adsorbent based on mesoporous zeolite

The present invention relates to a zeolite adsorbent having an external surface area of between 20 m 2 ·g −1 and 70 m 2 ·g −1 , a mesopore volume (V meso ) of less than or equal to 0.20 cm 3 ·g −1 , and a content of non-zeolite phase (NZP) of less than or equal to 6%, and in which at least one of its dimensions is greater than or equal to 30 μm. The invention also relates to the process for preparing said zeolite materials in agglomerated form and to the uses thereof for gas-phase or liquid-phase separation operations.

PROCESSES FOR SEPARATING DIMETHYL BIPHENYL ISOMERS USING ZEOLITE ADSORBENTS

In a process for separating one or more 3,3′-, 3,4′- and 4,4′-dimethyl biphenyl isomers, a feed comprising the isomers is contacted with a zeolite adsorbent which contains one or more metal cations in the +1 or +2 oxidation states. Separation processes for each of the 3,3′-, 3,4′- and 4,4′-dimethyl biphenyl isomers is provided. 1. A process for separating one or more of the dimethyl biphenyl (DMBP) isomers , 3 ,3′-DMBP , 3 ,4′-DMBP and/or 4 ,4′-DMBP from a mixture comprising two or more of said isomers , the process comprising a step of contacting said mixture with an adsorbent comprising at least one zeolite , wherein said zeolite comprises one or more metal cations in the +1 or +2 oxidation states.2. A process according to claim 1 , wherein the zeolite has a largest diffuse along dimension of at least about 4.0 Å.3. A process according to claim 1 , wherein the largest diffuse along dimension of the zeolite is at least about 4.5 Å claim 1 , or at least about 5.0 Å claim 1 , or at least about 5.5 Å claim 1 , or at least about 6.0 Å claim 1 , or at least about 6.5 Å claim 1 , or at least about 7.0 Å.4. A process according to claim 1 , wherein the largest diffuse along dimension of the zeolite is between about 4.0 Å and about 8.0 Å claim 1 , or between about 4.5 Å and about 8.0 Å claim 1 , or between about 5.0 Å and about 8.0 Å claim 1 , or between about 5.5 Å and about 8.0 Å claim 1 , or between about 6.0 Å and about 8.0 Å claim 1 , or between about 6.5 Å and about 8.0 Å.5. A process according to claim 1 , wherein the zeolite structure type comprises BEA claim 1 , FAU claim 1 , MFI claim 1 , MEL claim 1 , MTW claim 1 , MOR claim 1 , LTL claim 1 , EMT claim 1 , FER claim 1 , MAZ claim 1 , MEI claim 1 , TON claim 1 , MWW claim 1 , EUO claim 1 , MFS claim 1 , IMF claim 1 , MRE claim 1 , ITN claim 1 , MTT claim 1 , MSE or IWV.6. A process according to claim 1 , wherein the zeolite comprises a 12-ring zeolite claim 1 , an 11-ring zeolite or a 10-ring zeolite.7. A process ...

Production and separation of 3,3'-, 3,4'- and 4,4'-dimethyl biphenyl isomers

In a process for producing one or more 3,3′-, 3,4′- and 4,4′-dimethyl biphenyl isomers, a feed comprising toluene is contacted with hydrogen in the presence of a hydroalkylation catalyst under conditions effective to produce a hydroalkylation reaction product comprising (methylcyclohexyl)toluenes. At least part of the hydroalkylation reaction product is dehydrogenated in the presence of a dehydrogenation catalyst under conditions effective to produce a dehydrogenation reaction product comprising a mixture of dimethyl biphenyl isomers. The dehydrogenation reaction product is then separated into at least a first stream containing one or more 3,3′-, 3,4′- and 4,4′-dimethyl biphenyl isomers and at least one second stream comprising one or more 2,X′-dimethyl biphenyl isomers (where X is 2, 3, or 4). The 3,3′-, 3,4′- and 4,4′-dimethyl biphenyl isomers are then separated utilizing selective adsorption.

Large crystal tunable adsorbents

The present invention relates to a surface modified zeolite adsorbent wherein the surface of said zeolite is modified with a coating comprised of a silicone derived species, said zeolite having a mean crystal size from about 5 to about 10 μm and a skeletal density of ≥1.10 gr./cc. The invention is based on the discovery that larger crystals tend to have higher particle density, and the packing of the larger crystals in agglomeration processes leads to more idealized packing to provide a larger mean-pore diameter. The surface modified adsorbent provides rate selectivity for one gas over others is described. The superior adsorbent has the added convenience of bead forming simultaneously with pore modification as well as having the treatment result in the yielding of high crush strength products.

TUNABLE ADSORBENTS

The present invention relates to a method for modifying the crystalline inorganic framework of an adsorbent with coatings to provide rate selectivity for one gas over others is described. The method described herein narrows the effective pore size of crystalline porous solids with pores less than about 5A for rate selective separations. This method of the invention comprises treating the hydrated or partially hydrated zeolite with a silicone derived binding agent followed by subsequent heat treatment. The additive content and treatment are adjusted to match effective pore size to specific separations. The superior adsorbent has the added convenience of bead forming simultaneously with pore modification as well as having the treatment result in the yielding of high crush strength products. 2. The method of wherein prior to calcining claim 1 , the mixture is shaped into agglomerates claim 1 , beads claim 1 , extrudates claim 1 , or pellets.3. The method of wherein said crystalline inorganic adsorbent is a zeolite claim 1 , alumino phosphate claim 1 , titanosilicate claim 1 , or zinc silicate or combinations thereof.4. The method of wherein said zeolite is an A-type zeolite.5. The method of wherein said A-type zeolite is exchanged with one or more cations selected from Li claim 4 , Na claim 4 , K claim 4 , Mg claim 4 , Ca claim 4 , Sr claim 4 , Ba claim 4 , Ag claim 4 , Cu claim 4 , or Zn.6. The method of wherein R is selected from H claim 1 , straight claim 1 , branched or cyclic claim 1 , substituted or unsubstituted claim 1 , Cto Calkyl claim 1 , alkenyl claim 1 , alkynyl claim 1 , alkoxy and aryl.7. The method of wherein each R is the same or different and are selected from linear claim 1 , branched and cyclic compounds Cto Corganic compounds.8. The method of wherein the silicone precursor is polymeric or oligomeric and wherein each R substituent is independently terminated by hydroxy claim 1 , methoxy claim 1 , ethoxy or combinations thereof.9. The method of ...

Granulated Zeolites With High Adsorption Capacity for Adsorption of Organic Molecules

The invention relates to granulated zeolites with high adsorption capacity for organic molecules and the use of the zeolites for adsorbing organic molecules from liquids or gas streams.

Integrated Nitrile Poison Adsorption and Desorption System

In a feed clean-up process at least two adsorbents ( 2, 4 ) are installed in front of an oligomerization reactor ( 3 ). Olefin feed is sent over one adsorbent ( 2 ) and the nitrile poisons are adsorbed so that clean feed will enter the reactor ( 3 ). Before the adsorbent ( 2 ) will be saturated, the feed ( 1 ) is sent to the other, fresh adsorbent ( 4 ). At the same time oligomerization product from the reactor ( 3 ) is used to desorb nitriles from the spent adsorbent ( 2 ).

ZEOLITE ADSORBENTS WITH LOW BINDER CONTENT AND LARGE EXTERNAL SURFACE AREA, METHOD FOR PREPARATION OF SAME AND USES THEREOF

The present invention relates to a zeolite absorbent comprising at least one FAU zeolite with hierarchical porosity and comprising barium or barium and potassium, and the external surface area of which is greater than 20 m·g, and the non-zeolite phase content being between 6% and 12% by weight with respect to the total weight of the absorbent. The present invention also relates to the use of such a zeolite absorbent as an adsorption agent, as well as the method for separation of para-xylene from aromatic isomer fractions with 8 carbon atoms. 1. A zeolite adsorbent comprising at least one FAU zeolite with hierarchical porosity and comprising barium or barium and potassium , wherein the zeolite adsorbent has:{'sup': 2', '−1, 'an outer surface area, measured by nitrogen adsorption, of greater than 20 m·g, said outer surface area being combined with a population of mesopores with a mean diameter of between 2 nm and 50 nm, and'}a content of non-zeolite phase of between 6% and 12% by weight relative to the total weight of the adsorbent.2. The zeolite adsorbent according to claim 1 , wherein the FAU zeolite with hierarchical porosity of the zeolite adsorbent is a zeolite in the form of crystals having:a number-average diameter of between 1 μm and 20 μm,{'sup': 2', '−1, 'an outer surface area, measured by nitrogen adsorption, greater than 40 m·g.'}3. The zeolite adsorbent according to claim 1 , having a total volume contained in the macropores and the mesopores (sum of the macropore volume and of the mesopore volume) measured by mercury intrusion of between 0.15 cm·gand 0.5 cm·g.4. The zeolite adsorbent according to claim 1 , having a (macropore volume)/(macropore volume+mesopore volume) ratio of between 0.2 and 1.5. The zeolite adsorbent according to claim 1 , having a mass fraction of FAU zeolite greater than or equal to 88% relative to the total weight of adsorbent of the present invention claim 1 , the remainder to 100% consisting of non-zeolite phase.6. A process for ...

RADIOACTIVE IODINE ADSORBENT, AND METHOD FOR TREATING RADIOACTIVE IODINE

Provided is a radioactive iodine adsorbent capable of adsorbing radioactive iodine more effectively than in the conventional art, and removing hydrogen, which is a factor in nuclear reactor accidents. A granulated radioactive iodine adsorbent of zeolite X, wherein ion exchange sites of the zeolite X are substituted with silver so that a size of minute pores of the zeolite X is suited to a size of a hydrogen molecule, and the radioactive iodine adsorbent has a silver content of 36 wt % or more when dried, a particle size of 10×20 mesh, a hardness of 94% or more, and a water content of 12 wt % or less when dried at 150° C. for 3 h and thereby reduced in weight. 1. A granulated radioactive iodine adsorbent of zeolite X , whereinion exchange sites of the zeolite X are substituted with silver so that a size of minute pores of the zeolite X is suited to a size of a hydrogen molecule, andthe radioactive iodine adsorbent has a silver content of 36 wt % or more when dried, a particle size of 10×20 mesh, and a water content of 12 wt % or less when dried at 150° C. for 3 h and thereby reduced in weight.2. The radioactive iodine adsorbent of claim 1 , wherein97% or more of the ion exchange sites of the zeolite X are substituted with silver.3. The radioactive iodine adsorbent of claim 1 , whereinthe ion exchange sites of the zeolite X are not substituted with any material other than silver.4. A method for treating radioactive iodine contained in steam discharged from a nuclear power facility claim 1 , comprising:{'claim-ref': {'@idref': 'CLM-00001', 'claim 1'}, 'a filling step of filling an air-permeable container with the radioactive iodine adsorbent of ; and'}a flow passing step of passing a flow of the steam discharged from the nuclear power facility, through the container filled with the radioactive iodine adsorbent.5. The method of claim 4 , whereinthe steam discharged from the nuclear power facility contains hydrogen molecules.6. The method of claim 4 , whereinthe steam ...

METHOD FOR PRODUCING A FRACTION OF XENON RADIOISOTOPES, IN PARTICULAR XE-133, FRACTION OF XENON RADIOISOTOPES, IN PARTICULAR XE-133

A method for producing a fraction of xenon radioisotopes, comprising the steps of dissolving enriched uranium targets forming a slurry and a gaseous phase containing xenon radioisotopes, isolating the xenon radioisotopes using zeolite doped with silver, preferably chosen from the group consisting of aluminosilicates doped with silver, titanosilicates doped with silver and mixtures thereof, and recovering the fraction of xenon radioisotopes, in particular Xe-133. 1. A method for producing a fraction of xenon radioisotopes , comprising the steps of:(iv) dissolving enriched uranium targets by contacting with base to provide an alkaline slurry containing aluminum salts and isotopes generated from the fission of highly-enriched uranium and a gaseous phase containing xenon radioisotopes, as a fission product of uranium,(v) isolating the gaseous phase containing said Xenon radioisotopes, and(vi) recovering a fraction containing said xenon radioisotopes,wherein said uranium targets are low-enriched uranium targets and said isolation of said gaseous phase containing said xenon radioisotopes, comprises a step of adsorbing Xenon radioisotopes on a zeolite doped with silver.2. The method for producing a fraction of xenon radioisotopes according to claim 1 , further comprising a step of flushing said alkaline slurry with a rare gas making it possible to drive said gaseous phase containing said xenon radioisotopes for the purpose of isolating it.3. The method for producing a fraction of xenon radioisotopes according to claim 1 , wherein said zeolite is an aluminosilicate zeolite of the chabazite type claim 1 , doped with silver.4. The method for producing a fraction of xenon radioisotopes according to claim 1 , wherein said zeolite is a titanosilicate zeolite of the ETS type claim 1 , preferably ETS-10 claim 1 , doped with silver.5. The method for producing a fraction of xenon radioisotopes according to claim 1 , wherein said recovery of a fraction containing said xenon ...

DEVICE AND METHOD FOR REMOVING OF UNWANTED MATERIAL

A collection kit for the removal of unwanted material from a surface, said kit comprising: iv) ferromagnetic material to absorb and/or adsorb the unwanted material when spread across the unwanted material creating an area of operation; v) an apparatus having a magnetic source operable to attract the ferromagnetic material together with absorbed and/or adsorbed unwanted material when the magnetic source is touching or in the vicinity of the area of operation; and vi) means to dislodge the ferromagnetic material and absorbed and/or adsorbed unwanted material from the apparatus once the ferromagnetic material has been removed from the area of operation. 1. A collection kit for the removal of unwanted material from a surface , said kit comprising:i) ferromagnetic material to absorb and/or adsorb the unwanted material when spread across the unwanted material creating an area of operation;ii) an apparatus having a drum and a magnetic source arrangement within the drum and operable to attract the ferromagnetic material together with absorbed and/or adsorbed unwanted material to the surface of the drum when the magnetic source is in the vicinity of the area of operation; andiii) the arrangement of the magnets within the drum allows for the ferromagnetic material to rotate with or around the surface of the drum and be dislodged at an area removed from the area of operation.2. (canceled)3. A collection kid according to wherein the drum rotates around the magnetic source claim 1 , the magnetic source being operable through the surface of the drum to attract the ferromagnetic material that is spread across the area of operation.4. A collection kit according to wherein the magnetic source is housed within the drum in a fixed position; the drum operates to rotate around the magnetic source; the magnetic source being arranged to have lifter magnets having a stronger magnetic strength operate near the area of operation to attract the ferromagnetic material to the outer surface of ...

VACUUM-ASSISTED PROCESS FOR PREPARING AN ION-EXCHANGED ZEOLITE MEMBRANE

Effect ion-exchange of an alpha-alumina supported zeolite (e.g. a MFI zeolite, an LTA zeolite or a FAU zeolite) membrane, which process comprises: a) placing the membrane, which has a first surface and a spaced apart second surface, the first and second surfaces defining therebetween the membrane, in an ion exchange apparatus such that the first surface is in contact with an ion exchange solution and the second surface is in contact with a vapor space that is connected to a source of reduced pressure; b) actuating the source of reduced pressure to create a pressure differential between the first and second membrane surfaces of at least 0.4 atmosphere (0.405×10pascals); and c) maintaining the pressure differential under ion exchange conditions for a period of time sufficient to effect exchange of an ion contained in the ion exchange solution with an ion in the zeolite membrane in an amount that is greater than an amount of ion exchange attained using an apparatus that places the second surface in contact with a liquid solvent that is at a pressure of at least one atmosphere (1.013×10pascals) and the first surface in contact with the ion exchange solution at a pressure of at least two atmospheres (2.026×10pascals) so as to establish a pressure differential between the two surfaces of at least one atmosphere (1.013×10pascals), maintaining the pressure differential for the same period of time, and using the same ion exchange membrane, ion exchange solution and ion exchange temperature, the greater amount of ion exchange yielding an improved ion exchange membrane that a ratio of the ion that entered the membrane from the solution to the ion that left the membrane that is greater than that of the ion exchanged membrane prepared with the second surface in contact with the liquid solvent. 1. A process for effecting ion-exchange of an alpha-alumina supported zeolite membrane , which process comprises: a) placing the alpha-alumina supported zeolite membrane , the zeolite ...

Catalytic and sorptive articles comprising metal fiber felt substrates

Catalytic and/or sorptive articles comprising a metal fiber felt, the metal felt having an array of metal fibers and voids and a catalyst composition and/or a sorbent composition disposed on the metal fibers and within the voids are described. Such articles can be highly effective towards the abatement of pollutants in exhaust gas streams from internal combustion engines.

Application of Dealumination Y Type Zeolite in Degrading Organic Pollutants in Water Under Microwave Induction

Disclosed is an application of dealuminated Y type zeolite in degrading organic pollutants in water under microwave induction. The dealuminated Y type zeolite, with the cation being H+ and a mol ratio of SiO2 to Al2O3 being 60, is applied to degrading the organic pollutants in the water under microwave induction. The degrading rate of atrazine is up to 67.40 nmol/min under the radiation of 700 W microwave (2.450 GHz) at the laboratory simulation condition. 1. A method for sportive removal of organic contaminants from water , comprising applying a dealuminated Y zeolite to water containing the organic contaminants , allowing sorption of the contaminants onto the zeolite , and destroying the contaminants sorbed onto the zeolite with microwave-induced degradation.2. The method of claim 1 , wherein a SiO/AlOmolar ratio of the dealuminated Y zeolite is 60.3. The method of claim 1 , wherein surface cations of the dealuminated Y zeolite are H.4. The method of claim 1 , comprising applying a dealuminated Y zeolite with a SiO/AlOmolar ratio of 60 and surface cations of Hto water containing organic contaminants claim 1 , allowing sorption of the contaminants onto the zeolite claim 1 , and destroying the contaminants sorbed onto the zeolite with microwave-induced degradation. The present invention relates to an application of a dealuminated Y zeolite, particularly relates to the application of a dealuminated Y zeolite in sorptive removal of organic contaminants from water followed by destruction with microwave-induced degradation.With the rapid development of industries and increasing improvement of the living standard of people, serious pollution of aquatic environment by organic pollutants has become a common problem. Some of the organic pollutants can be enriched through food chains, and pose serious risk to human health.Various treatment technologies, such as activated carbon adsorption, advanced oxidation processes (AOPs), biodegradation, and zero-valent metal reduction, ...

Highly Siliceous Form of Zeolite RHO

A composition can include a Rho zeolite with a RHO topology having a Si to B ratio or a Si to A1 ratio greater than or equal to 8. Making such a composition can include heating an aqueous reaction mixture having a molar ratio of atomic Si to atomic B of about 4 to about 50 or a molar ratio of atomic Si to atomic Al of about 4 to about 50 in the presence of a C-Cdiquat of N,2-dimethylbenzimidazole structure directing agent to a temperature of at least 75° C. to produce a Rho zeolite. 1. A composition comprising:Rho zeolite with a RHO topology having a Si to B ratio or a Si to Al ratio greater than or equal to 8.2. The composition of claim 1 , wherein the Rho zeolite has a BET surface area about 800 m/g to about 1250 m/g.3. The composition of claim 1 , wherein the Rho zeolite has micropore volume of about 0.25 cm/g to about 0.50 cm/g.4. The composition of claim 1 , wherein the Rho zeolite has an average diameter of about 0.1 microns to about 25 microns.9. A process for separation of carbon dioxide from a mixture comprising carbon dioxide and one or more of an alkane claim 1 , oxygen claim 1 , nitrogen claim 1 , HS claim 1 , SO claim 1 , and NO claim 1 , the process comprising contacting the mixture with the composition of .10. A process for separation of carbon dioxide from a mixture comprising carbon dioxide and methane claim 1 , the process contacting the mixture with the composition of any one of .11. A process comprising contacting a gas stream comprising NOand the composition of impregnated with a metal.12. A process comprising synthesizing a methylamine from methanol and/or dimethylether and ammonia using the composition of as a catalyst.14. The method of claim 13 , wherein the aqueous reaction mixture has a molar ratio of atomic Si to the structure directing agent of about 1 to about 15.15. The method of claim 13 , wherein the aqueous reaction mixture has a molar ratio of water to atomic Si of about 2 to about 50.16. The method of claim 1 , wherein a Si source ...

BINDERLESS ZEOLITIC ADSORBENTS AND METHODS FOR PRODUCING BINDERLESS ZEOLITIC ADSORBENTS

The present invention generally relates to binderless zeolitic adsorbents and methods for making the binderless adsorbents. More particularly, the invention relates to FAU type binderless zeolitic adsorbents and methods for making the FAU type binderless adsorbents. The FAU type binderless adsorbents may be used for xylene separation and purification in selective adsorptive separation processes using binderless zeolitic adsorbents. 1. A binderless zeolitic adsorbent comprising:a first FAU type zeolite having a silica to alumina molar ratio of from about 3.0 to about 6.0;a binder-converted FAU type zeolite having a silica to alumina molar ratio of from about 2.0 to about 6.0, wherein the binder-converted FAU type zeolite may be 5-50% of the binderless zeolitic adsorbent; andcationic exchangeable sites within the binderless zeolitic adsorbent.2. The binderless zeolitic adsorbent of claim 1 , wherein at least 95% of the binderless zeolitic adsorbent is FAU type zeolite.3. The binderless zeolitic adsorbent of claim 1 , wherein at least 98% of the binderless zeolitic adsorbent is FAU type zeolite.4. The binderless zeolitic adsorbent of claim 1 , wherein the binder-converted FAU type zeolite may be 10-34% of the binderless zeolitic adsorbent.5. The binderless zeolitic adsorbent of claim 1 , wherein the cationic exchangeable sites may be alkali/alkaline earth cations.6. The binderless zeolitic adsorbent of claim 1 , wherein the cationic exchangeable sites may be barium claim 1 , potassium claim 1 , sodium claim 1 , or any combination of barium claim 1 , potassium claim 1 , or sodium.7. The binderless zeolitic adsorbent of claim 1 , wherein the ion-exchangeable sites of the agglomerates comprises Na at cationic exchangeable sites within the agglomerated FAU type zeolite adsorbent to at least 95% of the cationic exchangeable sites.8. The binderless zeolitic adsorbent of claim 1 , wherein the non-zeolitic binder comprises silica claim 1 , alumina claim 1 , or a combination of ...

BINDERLESS ZEOLITIC ADSORBENTS AND METHODS FOR PRODUCING BINDERLESS ZEOLITIC ADSORBENTS

The present invention generally relates to binderless zeolitic adsorbents and methods for making the binderless adsorbents. More particularly, the invention relates to FAU type binderless zeolitic adsorbents and methods for making the FAU type binderless adsorbents. The FAU type binderless adsorbents may be used for xylene separation and purification in selective adsorptive separation processes using binderless zeolitic adsorbents. 1. A binderless zeolitic adsorbent comprising:a first FAU type zeolite having a silica to alumina molar ratio below 3.0;a binder-converted FAU type zeolite having a silica to alumina molar ratio of from about 2.5 to about 6.0, wherein the binder-converted FAU type zeolite may be 5-50% of the binderless zeolitic adsorbent; andcationic exchangeable sites within the binderless zeolitic adsorbent.2. The binderless zeolitic adsorbent of claim 1 , wherein the binder-converted FAU zeolite includes a silica to alumina molar ratio of from about 3.0 to about 6.0.3. The binderless zeolitic adsorbent of claim 1 , wherein at least 95% of the binderless zeolitic adsorbent is FAU type zeolite.4. The binderless zeolitic adsorbent of claim 1 , wherein at least 98% of the binderless zeolitic adsorbent is FAU type zeolite.5. The binderless zeolitic adsorbent of claim 1 , wherein the cationic exchangeable sites may be alkali/alkaline earth cations.6. The binderless zeolitic adsorbent of claim 1 , wherein the cationic exchangeable sites may be barium claim 1 , potassium claim 1 , sodium claim 1 , or any combination of barium claim 1 , potassium claim 1 , or sodium.7. The binderless zeolitic adsorbent of claim 1 , wherein the non-zeolitic binder comprises silica claim 1 , alumina claim 1 , or a combination of silica and alumina.8. A method for producing a binderless zeolitic adsorbent comprising:forming agglomerates having ion-exchangeable sites, the agglomerates formed from FAU type zeolite having a silica to alumina molar ratio below 3.0, a non-zeolitic ...

METHOD FOR PRODUCING OLIGOSILANE AND APPARATUS FOR PRODUCING OLIGOSILANE

Provided is an oligosilane production method with which a target oligosilane can be selectively produced. A reaction-produced mixture fluid which contains an oligosilane obtained by the dehydrogenative coupling of a hydrosilane is supplied to a membrane separator under specific conditions and/or brought into contact with an adsorbent under specific conditions. 2. The method for producing an oligosilane according to claim 1 , wherein{'sub': 4', '2', '6, 'in the first step, the hydrosilane is tetrahydrosilane (SiH), and the produced oligosilane includes hexahydrodisilane (SiH).'}4. The method for producing an oligosilane according to claim 3 , wherein{'sub': 3', '8, 'the oligosilane represented by formula (R-1) is octahydrotrisilane (SiH), and'}{'sub': 2', '6, 'the oligosilane represented by formula (P-1) is hexahydrodisilane (SiH).'}6. The method for producing an oligosilane according to claim 5 , wherein{'sub': 2', '6, 'the oligosilane represented by formula (R-2) is hexahydrodisilane (SiH), and'}{'sub': 3', '8, 'the oligosilane represented by formula (P-2) is octahydrotrisilane (SiH).'}7. The method for producing an oligosilane according to claim 1 , whereinthe membrane used in the treatment (A) has a pore diameter of at least 0.1 nm and not more than 100 μm.8. The method for producing an oligosilane according to claim 1 , wherein{'sup': 2', '2, 'the adsorbent used in the treatment (B) has a BET specific surface area of at least 10 m/g and not more than 1,000 m/g.'}9. The method for producing an oligosilane according to claim 1 , whereinthe first step is carried out in the presence of hydrogen gas.10. The method for producing an oligosilane according to claim 1 , whereinthe first step is carried out in the presence of a catalyst containing a transition element.11. The method for producing an oligosilane according to claim 10 , whereinthe transition element contained in the catalyst is at least one transition element selected from the group consisting of group 4 ...

TUNABLE ADSORBENTS

The present invention relates to a method for modifying the crystalline inorganic framework of an adsorbent with coatings to provide rate selectivity for one gas over others is described. The method described herein narrows the effective pore size of crystalline porous solids with pores less than about 5 Å for rate selective separations. This method of the invention comprises treating the hydrated or partially hydrated zeolite with a silicone derived binding agent followed by subsequent heat treatment. The additive content and treatment are adjusted to match effective pore size to specific separations. The superior adsorbent has the added convenience of bead forming simultaneously with pore modification as well as having the treatment result in the yielding of high crush strength products. 115-. (canceled)16. A surface modified A type zeolite adsorbent having a effective pore size of less than or equal to 4.1 Å wherein the pore size of of said zeolite is reduced by 0.1 up to about 1.2 Å with a coating comprised of a silicone derived species , wherein said species is derived from a silicone precursor of formula I:{'br': None, 'sub': '2', 'i': 'n', '[(R)SiO]'}{'br': None, 'or of formula II{'br': None, 'sub': '1.5', 'RSiO'}wherein each R substituent is the same or different and it selected from a substituted or unsubstituted organic compound.17. The adsorbent of wherein prior to calcining claim 16 , the mixture is shaped into agglomerates claim 16 , beads claim 16 , extrudates claim 16 , or pellets.18. The adsorbent of wherein said zeolite is an A-type zeolite.19. The adsorbent of wherein said A-type zeolite is exchanged with one or more cations selected from Li claim 18 , Na claim 18 , K claim 18 , Mg claim 18 , Ca claim 18 , Sr claim 18 , Ba claim 18 , Ag claim 18 , Cu claim 18 , or Zn.20. The adsorbent of wherein each R is the same or different and is selected from H claim 16 , straight claim 16 , branched or cyclic claim 16 , substituted or unsubstituted claim 16 , ...

Perforated Adsorbent Particles

An adsorption vessel comprising a packed bed region of adsorbent particles contiguously arranged, comprising a perforated adsorbent particles, a gas separation process using the perforated adsorbent particles, and methods for making the perforated adsorbent particles. The perforated adsorbent particles each comprise an adsorbent material where the perforated adsorbent particles each have at least 10 channels extending through the particle. The equivalent diameter of the channels may range from 0.05 mm to 1.5 mm, and the void fraction of the channels may range from 0.05 to 0.5. 1. An adsorption vessel comprising:a packed bed region of adsorbent particles contiguously arranged, comprising a plurality of perforated adsorbent particles,wherein each perforated adsorbent particle comprises an adsorbent material capable of preferentially adsorbing at least one more strongly adsorbable gaseous component in a mixture comprising at least two gaseous components comprising the at least one more strongly adsorbable component and at least one less strongly adsorbable component, wherein the adsorbent material is a material selected from the group consisting of activated alumina, activated carbon, zeolites, mesopore-structured materials, carbon molecular sieve, metal-organic framework materials, silica gel, and combinations thereof; andwherein each perforated adsorbent particle defines a respective plurality of channels numbering at least 10, the respective plurality of channels extending through each perforated adsorbent particle in a lengthwise direction from a first end to a second end.2. The adsorption vessel of wherein the plurality of perforated adsorbent particles number at least 100; andwherein the packed bed region has an interparticle void fraction ranging from 0.09 to 0.5.3. The adsorption vessel of wherein the adsorbent particles are irregularly arranged in the packed bed region.4. The adsorption vessel of wherein the adsorbent particles are contiguously arranged in a ...

Separation membrane structure

A separation membrane structure comprises a porous support, a first separation membrane formed on the porous support, and a second separation membrane formed on the first separation membrane. The first separation membrane has an average pore diameter of greater than or equal to 0.32 nm and less than or equal to 0.44 nm. The second separation membrane includes addition of at least one of a metal cation or a metal complex that tends to adsorb nitrogen in comparison to methane.

COMPOSITION COMPRISING AN ACTIVATED CARBON, A ZEOLITE, AND FE IONS FOR A VEHICLE PASSENGER COMPARTMENT AIR FILTER

The invention relates to a composition () comprising an activated carbon () and a zeolite (), the zeolite () comprising Fe ions. The invention also relates to an air filter () for a ventilation, heating, and/or air conditioning system comprising this composition (). 118.-. (canceled)19. A composition comprising an activated carbon and a zeolite ,wherein the zeolite comprises 0.1 to 1.2% by mass of Fe ions,wherein the zeolite has a ZSM-5 crystalline structure,wherein the mass ratio of the zeolite to the activated carbon is 33%, and{'sup': 2', '3', '3, 'wherein the activated carbon has a B.E.T. surface area of 960 m/g, a micropore volume of 0.344 cm/g, a total pore volume of 0.404 cm/g and a median pore diameter of 5.0 Å.'}20. The composition of claim 19 , wherein the Fe ions are ferric or ferrous ions.21. The composition of claim 19 , wherein the Fe ions are held inside the zeolite.22. The composition of claim 19 , wherein the zeolite has a SiO/AlOmolar ratio of between 60 and 20.23. The composition of claim 19 , wherein the zeolite has a SiO/AlOmolar ratio of between 50 and 30.24. The composition of claim 19 , wherein the zeolite has a SiO/AlOmolar ratio of 40.25. The composition of claim 19 , wherein the zeolite is hydrophobic.26. The composition of claim 19 , wherein the activated carbon is a mixture of distinct activated carbons.27. An air filter for a ventilation claim 19 , heating claim 19 , and/or air conditioning system comprising the composition of .28. The air filter of claim 27 , wherein the zeolite and the activated carbon are arranged in a single layer. The invention relates to the compositions comprising an activated carbon, a zeolite and Fe ions used in air filters for a ventilation, heating, and/or air conditioning system for automotive vehicles. The invention further relates to air filters comprising such a composition.The passenger compartment filtration serves to filter both pollutants in particle form and gaseous pollutants. Today there are two ...

Methods for regenerating solid adsorbents

The invention provides for a method of regenerating a solid adsorbent, such as a molecular sieve or activated carbon, using stable fluorinated hydrocarbon compounds such as, for example, HFC-245cb (1,1,1,2,2-pentafluoropropane, as a regeneration fluid.

METAL IMPREGNATED ZEOLITE ADSORBENTS, METHODS OF MAKING, AND SYSTEMS FOR USING THE SAME

Metal exchanged and impregnated zeolite materials, methods for making metal exchanged and impregnated zeolite materials, and systems for reducing an amount of a contaminant species in a feed stream using a metal exchanged and impregnated zeolite material are provided. An exemplary metal exchanged and impregnated zeolite material comprises a metal exchanged zeolite material with the formula ((MO)•(M′O))•AlO•bSiO; and a metal oxide with the formula MO impregnated in the metal exchanged zeolite material such that the metal oxide is contacting an interior surface of the pore structure of the metal exchange zeolite material. In this example, M is a cation of an alkali or alkaline earth metal, n is a valence state of metal cation M, M′ is a cation of a metal other than an alkali or alkaline earth metal, n′ is a valence state of metal cation M′, 0≦a<1, 0 Подробнее

ZEOLITE-BASED ADSORBENTS BASED ON ZEOLITE X WITH A LOW BINDER CONTENT AND A LOW OUTER SURFACE AREA, PROCESS FOR PREPARING THEM AND USES THEREOF

The invention relates to an adsorbent comprising a zeolite-based phase and a non-zeolite-based phase, said adsorbent having: 1. An adsorbent comprising a zeolite-based phase and a non-zeolite-based phase , wherein said adsorbent:{'sup': 2', '−1, 'has an outer surface area of less than or equal to 30 m·g,'}{'sub': Hg', 'Hg, 'a pore diameter distribution, determined by mercury intrusion according to standard ASTM D 4284-83 and expressed by the volume distribution dV/d log D, wherein Dis the apparent pore diameter and V is the pore volume, the mode of which is between 100 nm and 250 nm, limits inclusive,'}and the zeolite-based phase comprises at least one zeolite of FAU structure of X type.2. The adsorbent according to claim 1 , wherein the pore diameter distribution corresponds to a unimodal distribution.3. The adsorbent according to claim 1 , having a micropore volume claim 1 , evaluated via the t-plot method from the nitrogen adsorption isotherm at a temperature of 77 K claim 1 , which is greater than 0.200 cm·g.4. The adsorbent according to claim 1 , wherein the adsorbent has a content of non-zeolite-based phase between 2% and 8% by weight relative to the total weight of the adsorbent.5. The adsorbent according to any one of the preceding claim 1 , further comprising barium or barium and potassium.6. The adsorbent according to claim 1 , having macropores and the mesopores claim 1 , wherein a total volume contained in the macropores and the mesopores as measured by mercury intrusion according to standard ASTM D4284 83 is between 0.15 cm·gand 0.5 cm·g claim 1 , limits inclusive.7. The adsorbent according to having a ratio defined as (macropore volume)/(macropore volume+mesopore volume) of between 0.2 and 1 claim 6 , limits inclusive.8. The adsorbent according to claim 1 , further having an Si/Al atomic ratio of between 1.00 and 1.50 claim 1 , limits inclusive.9. A process for preparing the adsorbent according to claim 1 , comprising the steps of:{'sup': 2', '−1, 'a) ...

ZEOLITE-BASED ADSORBENTS BASED ON LSX ZEOLITE OF CONTROLLED OUTER SURFACE AREA, PROCESS FOR PREPARING THEM AND USES THEREOF

The present invention relates to a zeolite-based adsorbent comprising at least one zeolite of FAU structure of LSX type and comprising barium and/or potassium, in which the outer surface area of said zeolite-based adsorbent, measured by nitrogen adsorption, is between 20 m·gand 100 m·g, limits inclusive. The present invention also relates to the use of such a zeolite-based adsorbent as an adsorption agent, and also to the process for separating para-xylene from aromatic isomer fractions containing 8 carbon atoms. 1. A zeolite-based adsorbent comprising at least one zeolite of FAU structure of LSX type , comprising at least one of barium or potassium , the zeolite-based adsorbent having an outer surface area , wherein the outer surface area of said zeolite-based adsorbent as measured by nitrogen adsorption is between 20 m·gand 100 m·g , limits inclusive.2. The zeolite-based adsorbent according to claim 1 , wherein the zeolite of FAU structure is a zeolite of FAU structure of LSX type in the form of crystals having a number-mean diameter of between 0.5 μm and 20 μm claim 1 , limits inclusive.3. The zeolite-based adsorbent according to having a content of barium (Ba) expressed as barium oxide (BaO) of greater than 25% by weight relative to the total weight of the adsorbent.4. The zeolite-based adsorbent according to claim 1 , having a content of potassium (K) claim 1 , expressed as potassium oxide (KO) claim 1 , of less than 30by weight relative to the total weight of the adsorbent.5. The zeolite-based adsorbent according to claim 1 , wherein the zeolite-based adsorbent has macropores and mesopores claim 1 , and wherein the total volume contained in the macropores and mesopores claim 1 , measured by mercury intrusion claim 1 , is between 0.15 cm·gand 0.5 cm·glimits inclusive.6. The zeolite-based adsorbent according to wherein the mass fraction of FAU zeolite in the adsorbant is greater than or equal to 85% by weight relative to the total weight of the adsorbent.7. The ...

CHEMICAL ABSORBENT

A chemical absorbent comprising a hydrated mixture of a major proportion of a pharmaceutically acceptable hydroxide of a Group II metal and a minor proportion of a Group I metal-containing zeolite. The chemical absorbent is substantially free of hydroxides of Group I metals. 1. A chemical absorbent comprising a hydrated mixture of a major proportion of a pharmaceutically acceptable hydroxide of a Group II metal and a minor proportion of a Group I metal-containing zeolite , the chemical absorbent being substantially free of hydroxides of Group I metals.2. A chemical absorbent as claimed in claim 1 , wherein the pharmaceutically acceptable hydroxide is calcium hydroxide.3. A chemical absorbent as claimed in claim 1 , wherein the pharmaceutically acceptable hydroxide accounts for 80-99% w/w (on a dry basis) of the chemical absorbent.4. A chemical absorbent as claimed in claim 1 , wherein the Group I metal containing zeolite accounts for 1-20% w/w (on a dry basis) of the chemical absorbent.5. A chemical absorbent as claimed in claim 1 , wherein the Group I metal-containing zeolite accounts for between 3% and 6% w/w of the chemical absorbent.6. A chemical absorbent as claimed in claim 1 , which contains between 14% and 20% w/w of water.7. A chemical absorbent as claimed in claim 1 , which consists essentially of the hydroxide of a Group II metal claim 1 , Group I metal-containing zeolite and water claim 1 , other components being present only in amounts of less than 1% w/w.8. A chemical absorbent as claimed in claim 1 , which consists solely of the hydroxide of a Group II metal claim 1 , Group I metal-containing zeolite claim 1 , water claim 1 , and one or more pH-sensitive dyes and/or other pigments claim 1 , the dyes and/or pigments accounting for less than 1% w/w of the composition.9. A chemical absorbent as claimed in claim 1 , wherein the Group I metal-containing zeolite is a sodium-containing zeolite.10. A chemical absorbent as claimed in claim 1 , which further ...

Using porous activated asphaltenes as effective adsorbents for the removal of heavy metals in water

A porous activated asphaltene material is described with a method of making and a method of using for the adsorption of a contaminant from a solution. The porous activated asphaltene material may be made by functionalizing solid asphaltene with nitric acid, and then treating the product with a metal hydroxide. The resulting porous activated asphaltene material exhibits a high porosity, and may be cleaned and reused for adsorbing contaminants.

ZEOLITE ADSORBENTS BASED ON BARIUM, STRONTIUM, POTASSIUM AND SODIUM, PREPARATION PROCESS THEREFOR, AND USES THEREOF

The present invention relates to zeolite adsorbents based on agglomerated crystals of zeolite X comprising barium, potassium, sodium and strontium. These adsorbents have applications in the separation of fractions of aromatic C8 isomers and in particular xylenes. 1. Zeolite adsorbent comprising zeolite X crystals and comprising barium , potassium , strontium and sodium , in which the KO/(KO+SrO+BaO+NaO) molar ratio of the species in oxide form is between 1.5% and 8.0% , limits included , and the SrO/(KO+SrO+BaO+NaO) molar ratio of the species in oxide form is between 0.5% and 8.0% , limits included.2. Adsorbent according to claim 1 , in which the KO/(KO+SrO+BaO+NaO) molar ratio of the species in oxide form is between 2.0% and 7.0% claim 1 , limits included.3. Adsorbent according to claim 1 , in which the SrO/(KO+SrO+BaO+NaO) molar ratio of the species in oxide form is between 0.5% and 7.0% claim 1 , limits included.4. Adsorbent according to claim 1 , in which the SrO/KO molar ratio of the species in oxide form is between 0.3 and 2.0 claim 1 , limits included.5. Adsorbent according to claim 1 , also comprising a non-zeolite phase.6. Adsorbent according to claim 1 , in which the content of sodium oxide NaO is less than 0.3% by weight relative to the total mass of the adsorbent.7. Adsorbent according to claim 1 , in which the total content of alkali metal or alkaline-earth metal ion oxides other than barium oxide BaO claim 1 , potassium oxide KO claim 1 , strontium oxide SrO and sodium oxide NaO is less than 1% by weight claim 1 , limits included claim 1 , relative to the total mass of the adsorbent.8. Adsorbent according to claim 1 , in which the zeolite X crystals have an Si/Al atomic ratio of between 1.00 and 1.50 claim 1 , limits included.9. Adsorbent according to claim 1 , said adsorbent having a number-average diameter of between 0.2 mm and 2 mm claim 1 , limits included.10. Adsorbent according to one claim 1 , in which the number-average diameter of the zeolite ...

MATERIALS, METHODS, AND DEVICES FOR SILOXANE CONTAMINANT REMOVAL

Adsorbent materials are disclosed, along with filter elements containing the adsorbent materials methods of using adsorbents to remove siloxane contaminants from a gas stream. The method includes providing an adsorbent material that has been washed with an acid and passing a gas through the adsorbent material so as to reduce siloxane levels in the gas. A filter element for reducing siloxane levels in a gas includes a first adsorbent material, the first adsorbent material comprising an acid-washed adsorbent; and a second adsorbent material, the second adsorbent material comprising an acid-impregnated adsorbent. 1. (canceled)250-. (canceled)51. A filter element for reducing siloxane levels in a gas , the filter element comprising:a first adsorbent material, the first adsorbent material comprising means for removing an basic contaminant; anda second adsorbent material, the second adsorbent material comprising means for removal of an acid gas or a siloxane or both;wherein the filter element is configured for the gas to pass through the first adsorbent material and the second adsorbent material.52. The filter element of claim 51 , wherein the means for removing an acid gas or a siloxane or both comprises potassium iodide (KI) claim 51 , potassium carbonate (KCO) claim 51 , or sodium hydroxide (NaOH) claim 51 , or a combination thereof.53. The filter element of claim 51 , wherein the means for removal of a basic contaminant comprises an activated carbon impregnated with phosphoric acid54. The filter element of claim 51 , wherein the filter element is configured for the gas to sequentially pass through the first adsorbent material and then the second adsorbent material.55. The filter element of claim 51 , the filter element further comprising:a third adsorbent material, the third adsorbent material comprising an activated carbon impregnated with phosphoric acid.56. The filter element of claim 55 , wherein the filter element is configured for the gas to sequentially pass ...

CUSTOM WATER ADSORPTION MATERIAL

The technology disclosed herein is directed to controlling humidity levels, such as the humidity level in an enclosed environment. The water isotherm of the adsorbent material is customized through the modification of the surface chemistry of the adsorbent. By modifying the surface chemistry of the adsorbent in various ways and to varying degrees, it is possible to customize the adsorbent properties to a range of different humidity levels. Such modification can enhance the adsorbing capacity and efficiency of the adsorbent, especially with regard to low molecular weight water-soluble compounds. 124.-. (canceled)25. A material suitable for use in controlling humidity , the material comprising:a first adsorbent material, the first adsorbent material having received a first treatment on at least the surface of the first adsorbent material, the treatment providing modified water absorbency properties to the adsorbent; anda second adsorbent material, the second adsorbent material having received a second treatment on at least the surface of the first adsorbent material, the treatment providing modified water absorbency properties to the second adsorbent.26. The modified adsorbent material of claim 25 , wherein the first and second adsorbent material are arranged in a layered arrangement.27. The modified adsorbent material of claim 25 , wherein the first and second adsorbent material are in a mixed arrangement.28. The modified adsorbent material of claim 25 , wherein at least one of the first and the second adsorbent comprises activated carbon.29. The modified adsorbent material of claim 25 , wherein at least the first or second adsorbent is selected from the group comprising carbon claim 25 , silica claim 25 , molecular sieves claim 25 , zeolites claim 25 , and combinations thereof.30. The modified adsorbent material of claim 25 , wherein at least one treatment comprises acid treatment.31. The modified adsorbent material of claim 25 , wherein at least one treatment ...

Functionalization of zeolites

Functionalized zeolites, including a zeolite substrate and a self-assembled monolayer of a phosphonic acid on a surface of the zeolite substrate, are disclosed, as are methods of making and using the functionalized zeolites. The disclosed methods and compositions have various applications, including in the use of molecular sieves to separate small-molecule gases from mixtures thereof. Gas adsorption selectivities and diffusion rates of the functionalized zeolites may be tuned or selected according to the disclosed methods.

METHOD FOR GAS SEPARATION

A method for separating at least one hydrocarbon from a feed containing a mixture of at least one hydrocarbon and nitrogen, comprising contacting the feed with an adsorbent comprising a porous support wherein the porous support comprises exchangeable cations and at least a portion of the exchangeable cations are organic cations. 1. A method for separating at least one hydrocarbon from a feed containing a mixture of at least one hydrocarbon and nitrogen , comprising contacting the feed with an adsorbent comprising a porous support wherein the porous support comprises exchangeable cations and at least a portion of the exchangeable cations are organic cations , wherein the porous support has pore diameters large enough to adsorb a hydrocarbon of interest.2. A method for separating at least one hydrocarbon from a feed containing a mixture of at least one hydrocarbon and nitrogen of claim 1 , wherein one of the at least one hydrocarbons is methane.3. A method for separating at least one hydrocarbon from a feed containing a mixture of at least one hydrocarbon and nitrogen according to claim 1 , wherein the porous support is selected from coordinated polymeric materials claim 1 , including metal organic frameworks claim 1 , aluminosilicates claim 1 , zeolites claim 1 , zeolite-like metal-organic frameworks claim 1 , molecular sieves claim 1 , titanosilicates claim 1 , layered hydroxides or hydrotalcites.4. (canceled)5. A method for separating at least one hydrocarbon from a feed containing a mixture of at least one hydrocarbon and nitrogen according to claim 1 , wherein the porous support is a zeolite claim 1 , where the zeolite is selected from the group consisting of ferrierite claim 1 , brewsterite claim 1 , stilbite claim 1 , dachiardite claim 1 , epistilbite claim 1 , heulandite and clinoptilolite claim 1 , and where the zeolite has faujasite claim 1 , Linde type A or chabazite topology.67-. (canceled)8. A method for separating at least one hydrocarbon from a feed ...

Synthesis of ultra-small pore aluminosilicates by controlled structural collapse of zeolites

A method of forming the highly selective ultra-small pore amorphous adsorbent includes introducing an ion-exchange material to a sodium aluminosilicate zeolite such that an ion-exchanged zeolite forms, calcinating the ion-exchanged zeolite at a calcination temperature such that the ion-exchanged zeolite collapses and forms the decationized amorphous adsorbent, and introducing a back ion-exchange material to the decationized amorphous adsorbent such that the highly selective ultra-small pore amorphous adsorbent forms. The highly selective ultra-small pore amorphous adsorbent has a pore aperture size operable to permit carbon dioxide to adsorb into the amorphous adsorbent and operable to deny methane from adsorbing into the amorphous adsorbent.

REMOVAL OF HETEROATOM-CONTAINING COMPOUNDS FROM FLUIDS

In some embodiments, the present disclosure pertains to methods of removing heteroatoms from a fluid by associating the fluid with one or more adsorbents, where the association results in the removal of the heteroatoms from the fluid. The association may occur by associating the fluid with a single adsorbent or a plurality of adsorbents in a sequential manner that maximizes heteroatom removal efficacy. The methods may be utilized to remove heteroatom-containing compounds from various fluids, such as fuels, hydrocarbons, alcohols, water, organic solvents, and combinations thereof. The one or more adsorbents may include, without limitation, activated carbon, zeolites, ion exchanged zeolites, ion impregnated zeolites, alumina, alumina nanowires, carbon-based supports, and combinations thereof. The methods of the present disclosure can be utilized to reduce heteroatoms in the fluid by more than about 50%, by more than about 80%, or by more than about 99%. 1. A method of removing heteroatoms from a fluid , wherein the method comprises: 'wherein the associating results in the removal of the heteroatoms from the fluid at the desired temperature or temperature range.', 'associating the fluid with one or more adsorbents at a desired temperature or temperature range,'}23-. (canceled)4. The method of claim 1 , wherein the associating occurs in a single step or in multiple steps by contacting the fluid with one or more adsorbents.5. (canceled)6. The method of claim 1 , wherein the associating occurs by associating the fluid with a plurality of adsorbents in a sequential manner claim 1 ,wherein the sequential association is arranged to maximize heteroatom removal,wherein the plurality of adsorbents are sequenced in a specific order to selectively remove competing heteroatoms from fluid components, andwherein heteroatom removal efficacy is maximized by requiring less adsorbents, requiring less processing time, enhancing heteroatom removal efficiency, removing more heteroatoms, or ...

MORDENITE ZEOLITE AND PRODUCTION METHOD THEREFOR

Provided is a mordenite zeolite which can be produced without using an organic structure-directing agent, and has superior multivalent metal cation exchange capability. The mordenite zeolite according to the present invention containing silicon, a divalent metal M and aluminum in a skeletal structure, wherein the mordenite zeolite has the following atomic ratios in the state of Na-form. The mordenite zeolite preferably has a BET specific surface area of 250 m/g or more and 500 m/g or less and a micropore volume of 0.07 cc/g or more and 0.25 cc/g or less in the state of Na-form or H-form. Si/(M+Al)=5 or more and 10 or less, M/(M+Al)=0.1 or more and less than 1, and Na/(M+Al)=1 or more and less than 2 1. A mordenite zeolite containing a silicon , a divalent metal M and an aluminum in a skeletal structure , wherein the mordenite zeolite has the following atomic ratios in the state of Na-form ,Si/(M+Al)=5 or more and 10 or less,M/(M+Al)=0.1 or more and less than 1, andNa/(M+Al)=1 or more and less than 2.2. The mordenite zeolite according to claim 1 , wherein the mordenite zeolite has a BET specific surface area of 250 m/g or more and 500 m/g or less and a micropore volume of 0.07 cc/g or more and 0.25 cc/g or less in the state of Na-form or H-form.3. The mordenite zeolite according to claim 1 , wherein the mordenite zeolite is in the form of particles each comprising a shell formed of a solid portion and a hollow portion existing inside the shell.4. The mordenite zeolite according to claim 3 , wherein the shell has one opening and the hollow portion communicates externally through the opening.5. The mordenite zeolite according to claim 3 , wherein the shell comprises a pair of openings in positions facing each other in a degree of 180° claim 3 , and wherein the hollow portion communicates externally through each of the openings.6. The mordenite zeolite according to claim 5 , wherein the shell further comprises an opening in a direction intersecting a direction in which ...

ZEOLITE ADSORBENT MATERIAL, METHOD OF PREPARATION AND USE FOR NON-CRYOGENIC SEPARATION OF INDUSTRIAL GASES

Provided is a zeolitic adsorbent material. The material is based on LSX zeolite crystals the particle size distribution of which is characterized by a peak width (2σ) in a range from 6.0 to 20.0, limits included, for a number average diameter (d50) in a range from 0.5 μm to 20.0 μm. The material has an Si/Al atomic ratio comprised in a range from 1.00 to 1.15, limits included. The lithium content of the material, expressed by weight of LiO, is in a range from 9% to 12% by weight relative to the total weight of the material. The material has a non-zeolitic phase (NZP) content such that 0 Подробнее

Method for manufacturing an adsorbent useful for olefin separation

A process for the production of a type X structured crystalline aluminosilicate adsorbent useful in the separation of olefins from a hydrocarbon mixture comprising olefins and paraffins. The process basically comprises contacting a precursor mass containing type X structured crystalline aluminosilicate and amorphous material as a binder with an aqueous caustic solution to effect the addition of alkali metal cation to the crystalline structure thereby producing an adsorbent which has both increased capacity for olefins and decreased catalytic activity.

Method of manufacturing a zeolitic adsorbent useful for aromatic separation

A method of manufacturing a solid adsorbent which method comprises the steps of: contacting a base material containing type X or type Y zeolite with a fluoride-containing solution of sodium hydroxide at first ion exchange conditions to effect the addition of sodium cations to and the extraction of alumina from the base material; ion exchanging the base material at second ion exchange conditions to effect the essentially complete exchange of sodium cations; and, drying the exchanged zeolite at conditions ro reduce the LOI at 900*C. to less than about 10 wt. %. The sodium cations can be essentially completely exchanged with either barium and potassium cations in a weight ratio of from about 1.5 to 200 or with barium cations alone. The combination fluoride-caustic treatment prior to the exchange with potassium and barium or with barium alone produces a superior adsorbent for separating the para isomer from a feed mixture comprising at least two bi-alkyl substituted monocyclic aromatic isomers, including the para isomer, the isomers having from 8 to about 18 carbon atoms per molecule. The adsorbent so produced has faster para isomer transfer rates and higher aromatic capacity than one produced either from untreated base material or from base material treated with fluoride or caustic alone. Additionally a fluoride treatment of base material alone or in combination with or subsequent to a caustic treatment, prior to potassium and barium or barium ion exchange, essentially eliminates a troublesome dustiness characteristic of adsorbents prepared from untreated base material.

Method of manufacturing a zeolitic adsorbent

Process for purification of hydrocarbons using metal exchanged clinoptilolite to remove carbon dioxide

Clinoptilolites, including both natural clinoptilolites and those which have been ion-exchanged with metal cations such as lithium, sodium, potassium, calcium, magnesium, barium, strontium, zinc, copper, cobalt, iron and manganese, are useful for the removal of traces of carbon dioxide and water from streams of hydrocarbons having kinetic diameters of not more than about 5 ANGSTROM .

Siliceous molecular sieves having low acid activity and process for preparing same

The present invention relates in general to highly siliceous zeolitic molecular sieve adsorbent compositions having reduced catalytic activity and to the process for preparing such compositions. The number of acid sites in the so-called silica molecular sieves is very low, but exhibit a disproportionately high acid activity. In a variety of adsorptive separation applications in which the hydrophobic character of these molecular sieves is important, undesirable catalytic conversion of one or more of the adsorbates is frequently encountered. This acid activity is effectively eliminated by incorporating a stoichiometric excess with respect to the aluminum content of the molecular sieve of an alkali metal compound into the molecular sieve followed by calcining the loaded silicalite at temperatures of at least 750°C. The adsorbent is particularly useful in separations of materials which are subject to catalytically initiated reactions, e.g., olefins and alcohols.