Eine feste Katalysatorkomponente für die Polymerisation von Ethylen, Herstellung derselben und ein Katalysator diese enthaltend

Ein Verfahren zur Herstellung einer Katalysatorkomponente zur Verwendung bei Homopolymerisation oder Copolymerisation von Ethylen, umfassend die Schritte:- Lösen einer Magnesiumverbindung in einem Lösungsmittelsystem enthaltend eine organische Epoxyverbindung und eine Organophosphorverbindung unter Bildung einer homogenen Lösung;- Kontaktieren der Lösung mit einer Titanverbindung in der Gegenwart einer Fällungshilfe zur Fällung eines Feststoffes;- Behandlung des erhaltenen Feststoffes mit einer Elektronendonatorverbindung ausgewählt aus der Gruppe bestehend aus aliphatischen Ethern, cyclischen Ethern, aromatischen Ethern, aliphatischen Ketonen und alicyclischen Ketonen unter Erhalt eines Produktes.

A solid catalyst component for polymerization of ethylene, preparation thereof and a catalyst containing the same

Equivalent inertia evaluation and frequency response modeling method for multiple asynchronous motors

The invention provides an equivalent inertia evaluation and frequency response modeling method for multiple asynchronous motors, and belongs to the technical field of power system frequency stability analysis. The problem that inertia evaluation and frequency response modeling of a power system are difficult when a plurality of asynchronous motors are connected to the power system is solved. Comprising the following steps: step 1, acquiring to-be-analyzed power system frequency response data through a power grid SCADA system, and dividing historical data into a fitting set and a test set; 2, establishing a dynamic equivalent model of the power system to be analyzed, wherein the dynamic equivalent model adopts a low-order power system model in a transfer function form; 3, fitting parameters of the dynamic equivalent model from a test set through a genetic algorithm; 4, testing whether the parameters of the established dynamic equivalent model conform to the test indexes or not on the test ...

Catalyst component for ethylene polymerization and catalyst thereof

The invention provides a solid catalyst component for ethylene polymerization or copolymerization, which does not adopt silica gel and the like as carriers, but uses a solid containing magnesium and titanium as the carrier component and loads a certain quantity of a titanium compound, an electron donor and an activator, and the catalyst component has the advantages of relatively narrow particle size distribution, high activity of the catalyst and obtainment of a polymer with low content of fine powder, thereby being applicable to slurry polymerization or vapor phase polymerization of ethylene, in particular to the polymerization process of a vapor phase fluidized bed of the ethylene which feeds the catalyst in the slurry form.

Installation device of hydraulic level gauge for monitoring settlement of laid pipeline in pipe drawing construction

The invention belongs to the technical field of construction, particularly relates to an installation device for a settlement monitoring hydraulic level gauge for laying a pipeline in pipe drawing construction, and provides the following scheme aiming at the problems that when the level gauge is installed in an existing technical scheme, a protective sleeve needs to be installed on the ground in advance, the level gauge needs to be dismantled in the later period, and excavation needs to be carried out. The device comprises a base, the right side of the base is rotationally connected with a blocking shaft, the right side of the top of the base is fixedly provided with a mounting frame, the interior of the mounting frame is connected with a driving assembly, and the driving assembly is connected with a protection guide pipe. The leveling instrument probes can be inserted into the earth surface by starting the driving motor and the excavation motor, the insertion angle of the protection guide ...

A SOLID CATALYST COMPONENT FOR POLYMERIZATION OF ETHYLENE, PREPARATION THEREOF AND A CATALYST CONTAINING THE SAME

CATALYST COMPONENT FOR OLEFIN POLYMERIZATION OR COPOLYMERIZATION,PREPARATION METHOD THEREOF, CATALYST CONTAINING SAID CATALYST COMPONENT AND USE THEREOF

A catalyst component for olefin polymerization or copolymerization, preparation method thereof, catalyst containing said catalyst component and the use thereof in the olefin polymerization or copolymerization. The inventive catalyst component contains magnesium, titanium, halogen, internal electron donor and alkoxy derived from surface modifier, wherein the content of said alkoxy derived from surface modifier is 0.01 to 3 by weight, based on the weight of catalyst component. © KIPO & WIPO 2009 ...

A SOLID CATALYST COMPONENT FOR POLYMERIZATION OF ETHYLENE, PREPARATION THEREOF AND A CATALYST CONTAINING THE SAME

The present invention provides a catalyst component used for homopolymerization or co-polymerization of ethylene, comprising at least one suitable electron donor compound supported on a composition containing magnesium and titanium, wherein the electron donor compound is selected from the group consisting of aliphatic ethers, alicyclic ethers, aromatic ethers, aliphatic ketones and alicyclic ketones, and wherein the composition containing magnesium and titanium is prepared by dissolving a magnesium compound into a solvent system to form a homogeneous solution and then contacting the solution with a titanium compound in the presence of a precipitation aid to precipitate the composition. The present invention also relates to a method for the preparation of said catalyst component and a catalyst comprising thereof, and to use of the catalyst in homopolymerization or co-polymerization of ethylene. © KIPO & WIPO 2007 ...

Pyramid universal stepless rolling line adjusting device and design method

The invention relates to a rolling line adjusting device and a design method. The rolling line adjusting device is characterized in that two output shafts of a worm reducer (6) are designed to be a left screw rod (4) and a right screw rod (4), a left pyramid sliding block (3) and a right pyramid sliding block (3) which are symmetrical are driven to slide along an upper tapered surface and a lowertapered surface by a left screw nut (5) and a right screw nut (5), thereby pushing and moving a lower wedge sliding block (12) to vertically downwards move so that the stepless rolling line adjustment is realized. The rolling line adjusting device is used for adjusting a rolling line during a large-stroke six-roll cold rolling operation, and has simple and compact structure, safe and reliable property, light weight, low cost, good rigidity, large adjustment amount, attractive appearance, and convenient maintenance.

Catalyst component for vinyl polymerization and catalyst thereof

The invention relates to a catalyst component for vinyl polymerization, which comprises reaction products of the following components: (1) a magnesium chloride alcohol compound; (2) a titanium compound; (3) an organic metal compound; (4) an electron donor compound selected from aliphatic ether, ring fat ether or aliphatic ketones; and (5) an acyl chlorides compound shown in the general formula R'(COX)n. The catalyst has the advantages of high catalytic activity, better hydrogen adjustment sensitivity, narrow polymer particle size distribution and the like.

Wind power plant frequency and voltage cooperative secondary tuning control method and system

The invention discloses a frequency and voltage coordinated secondary tuning control method and system for a wind power plant, and the method comprises the following steps: obtaining deviation values between the frequency of a power grid and a reference value and between the voltage of a bus and a reference value when a fault occurs; establishing a state-space equation based on the obtained deviation value; obtaining an initial control quantity through the state equation; establishing a cost function based on the state-space equation; obtaining a control matrix based on the control quantity and the cost function; active power output and reactive power output of a wind power plant are adjusted through state equation calculation when frequency and voltage change, frequency and voltage are controlled at the same time, cooperative control over the power grid frequency and bus voltage is achieved, optimal control input is calculated through a cost function, control errors caused by desynchrony ...

Fault intelligent guide processing method and system

The invention provides an intelligent fault guiding processing method and system. The system comprises a fault early warning module, a retrieval knowledge base module, a guide processing module and an input knowledge base module. When the equipment is abnormal, the fault early warning module sends out a fault alarm signal, and the retrieval knowledge base module judges whether a solution scheme exists or not; if so, entering a guide processing module for direct processing; and if not, after processing is completed, inputting is carried out through the input knowledge base module. The invention also relates to a method of the fault intelligent guide processing system. The technical problems of high labor cost, long operation and maintenance period and the like caused by the facts that faults are traceless and can be found in the existing equipment production process and fault detection needs on-site guidance of experts and operation and maintenance are solved. The knowledge base is arranged ...

Catalyst component for olefin polymerization, preparation method of catalyst component, catalyst and application of catalyst component

The invention relates to the field of olefin polymerization catalysts, and provides a catalyst component for olefin polymerization, a preparation method of the catalyst component, a catalyst and application of the catalyst. The catalyst component for olefin polymerization contains a superfine inorganic oxide and a main catalytic component, wherein the main catalytic component is a reaction product of magnesium halide, an alkyl disilazane compound, titanium halide and an electron donor compound. The catalyst component and an organic aluminum compound are used for olefin polymerization reaction after being activated. The polymer prepared by adopting the catalyst has high melt index and low oligomer content.

Metal organic compound catalyst for olefin polymerization as well as preparation method and application of metal organic compound catalyst

The present invention belongs to the field of olefin polymerization catalysts, and particularly relates to a metal organic compound catalyst for olefin polymerization, the metal organic compound catalyst comprises an organic aluminum compound, an inorganic oxide carrier and a metal silazane compound, and the metal silazane compound is obtained by reaction of magnesium halide, an alkyl trisilazane compound, titanium halide and an oxygen-containing electron donor. The polymer prepared by adopting the metal organic compound catalyst has high melt index and low oligomer content.

Catalyst component for ethylene polymerization reaction, and catalyst thereof

The present invention relates to a catalyst component for an ethylene polymerization reaction, a catalyst component preparation method and a catalyst of the catalyst component, wherein the catalyst component comprises reactants of a magnesium-alcohol adduct, a titanium compound, an organic aluminum compound, a long chain carbon monoester compound, and a cyclic ketone compound. According to the present invention, the catalyst has high hydrogen response, and the obtained polyethylene powder material has characteristics of high bulk density and wide molecular weight distribution.

Wedge universal stepless rolling line adjusting device and design method

The invention relates to a rolling line adjusting device and a design method. The rolling line adjusting device is characterized in that two output shafts of a worm reducer (6) are designed to be a left screw rod (4) and a right screw rod (4), a left pyramid sliding block (3) and a right pyramid sliding block (3) which are symmetrical are driven to horizontally move by a left screw nut (5) and a right screw nut (5), meanwhile, an upper supporting roll bearing seat (10) is driven by a ball ring (9) so that the stepless rolling line adjustment is realized. The rolling line adjusting device is used for adjusting a rolling line during a four-roll cold rolling operation, and has simple and compact structure, safe and reliable property, light weight, low cost, good rigidity, large adjustment amount, and convenient maintenance.

Endoscope operating handle

The invention relates to an endoscope operating handle which comprises a steering traction mechanism, the steering traction mechanism comprises a traction wire, a traction fixing terminal and a rotating disc, the traction fixing terminal comprises a fixing hole and a guide hole, and the guide hole is configured to be a through hole perpendicular to the central axis of the traction fixing terminal; the near end of the traction wire is axially arranged in the guide hole in a penetrating manner, the fixing hole is configured to be a blind hole which is coaxial with the central axis of the traction fixing terminal, the fixing hole and the guide hole are vertically intersected, and at least partial area in the fixing hole and/or at least partial area in the guide hole are/is provided with a welding material for welding and fixing the traction wire; at least one traction fixing terminal is arranged in the rotating disc, the central axis of the traction fixing terminal is parallel to the central ...

Eine feste Katalysatorkomponente für die Polymerisation von Ethylen, Herstellung derselben und ein Katalysator diese enthaltend

Eine Katalysatorkomponente zur Verwendung bei der Homopolymerisation oder Copolymerisation von Ethylen, umfassend mindestens eine auf einer Zusammensetzung, enthaltend Magnesium und Titan, geträgerte Elektronendonatorverbindung, wobei die Elektronendonatorverbindung aus der Gruppe, bestehend aus aliphatischen Ethern, cyclischen Ethern, aromatischen Ethern, aliphatischen Ketonen und alicyclischen Ketonen, ausgewählt ist, und worin die Zusammensetzung, enthaltend Magnesium und Titan, durch Lösen einer Magnesiumverbindung in einem Lösungsmittelsystem unter Bildung einer homogenen Lösung hergestellt und anschließend die Lösung mit einer Titanverbindung in Gegenwart einer Fällungshilfe zur Fällung der Zusammensetzung in Kontakt gebracht wird.

Wedge universal stepless rolling line adjusting device

The invention relates to a rolling line adjusting device and a design method. The rolling line adjusting device is characterized in that two output shafts of a worm reducer (6) are designed to be a left screw rod (4) and a right screw rod (4), a left pyramid sliding block (3) and a right pyramid sliding block (3) which are symmetrical are driven to horizontally move by a left screw nut (5) and a right screw nut (5), meanwhile, an upper supporting roll bearing seat (10) is driven by a ball ring (9) so that the stepless rolling line adjustment is realized. The rolling line adjusting device is used for adjusting a rolling line during a four-roll cold rolling operation, and has simple and compact structure, safe and reliable property, light weight, low cost, good rigidity, large adjustment amount, and convenient maintenance.

Polymerization of ethylene catalyst component having high output ratio, preparation and use

The invention relates to a catalyst component used for the ethylene polymerization or the co-polymerization, the preparation method thereof, and the application of catalyst comprising the catalyst component in the ethylene polymerization or co-polymerization. The catalyst component is formed by loading at least one inorganic titanium compound, at least one organic compound, at least one electron donor, and at least one activator on a magnesium/titanium-containing solid. The invention provides a high-efficiency high-hydrogen-sensitivity solid catalyst component capable of acquiring low fine powder content polymer. The catalyst component has the advantages of relatively narrow particle size distribution, smaller average particle size, and higher catalyst activity, and is suitable for the slurry polymerization or gas phase polymerization of ethylene, and particularly suitable for a gas phase fluidized bed polymerization process of ethylene by feeding the catalyst in the form of slurry. Meanwhile ...

Catalyst for vinyl polymerization and preparation and application thereof

The invention provides a solid catalyst component for vinyl polymerization and a preparation method thereof. The component is prepared by the following three continuous synthesis steps of: preparing a magnesium-containing solid from metal magnesium and alcohol in the presence of halogen or a compound containing halogen elements; treating the magnesium-containing solid to prepare a magnesium-containing catalyst carrier by using an organic metal compound or a mixture of the organic metal compound and an electron donor; and treating the magnesium-containing catalyst carrier to prepare the catalyst component by using a compound of transition metal titanium in the presence of an inert diluent. The solid catalyst component has the characteristics of simple technology, convenience of operation, low investment of industrial equipment, low production cost, easily controlled product quality, and the like. By catalyzing the vinyl polymerization together with alkyl aluminum, the solid catalyst component ...

Siloxane compound-loaded catalyst system as well as preparation method and application thereof

The invention relates to the field of olefin polymerization catalysts, and provides a siloxane compound-loaded catalyst system and an olefin polymerization catalyst containing the siloxane compound-loaded catalyst system. The siloxane compound-loaded catalyst system contains a product obtained by reaction of the main catalytic metal component and polysiloxane, so that the obtained catalyst has higher activity, and in addition, the superfine inorganic oxide carrier is added into the catalyst component, so that the catalyst has higher dispersity and more excellent catalytic effect. The polymer prepared by adopting the catalyst has high melt index and low oligomer content.

Solid catalyst component for polymerization of ethylene, preparation thereof and a catalyst containing the same

The present invention provides a catalyst component used for homopolymerization or co-polymerization of ethylene, comprising at least one suitable electron donor compound supported on a composition containing magnesium and titanium, wherein the electron donor compound is selected from the group consisting of aliphatic ethers, alicyclic ethers, aromatic ethers, aliphatic ketones and alicyclic ketones, and wherein the composition containing magnesium and titanium is prepared by dissolving a magnesium compound into a solvent system to form a homogeneous solution and then contacting the solution with a titanium compound in the presence of a precipitation aid to precipitate the composition. The present invention also relates to a method for the preparation of said catalyst component and a catalyst comprising thereof, and to use of the catalyst in homopolymerization of ethylene or co-polymerization of ethylene with at least one C 3 –C 8 α-olefin.

Adjustable spraying system of integral-rack twenty-roller rolling mill

The invention belongs to the technical field of plate-strip rolling, and particularly relates to an adjustable spraying system of an integral-rack twenty-roller rolling mill. The adjustable spraying system is composed of a spraying frame, a right spraying mechanism and a left spraying mechanism, the right spraying mechanism and the left spraying mechanism are radially symmetric according to the center of a rack of the twenty-roller rolling mill, liquid incoming pipes are arranged on the side faces at two ends of the spraying frame, and the right spraying mechanism comprises a right upper spraying device, a right lower spraying device and a right supporting roller spraying pipe. By the adjustable spraying system, the defect that a tower-type roller system of the integral-rack twenty-roller rolling mill is compact in spatial structure is overcome, angle and distance of spraying nozzles can be properly adjusted according to needs on spraying position of the rolling mill under different roller ...

OLEFIN POLYMERIZATION CATALYST COMPRISING CYCLOTRIVERATRYLENE AND DERIVATIVES THEREOF

The present invention discloses a Ziegler-Natta catalyst system for olefin polymerization, comprising at least one compound represented by formula (I) as (i) an internal electron donor, (ii) an external electron donor, or (iii) the both, wherein M 1 , M 2 , M 3 , M 4 , M 5 , M 6 , M 1 ′, M 2 ′, M 3 ′, M 4 ′, M 5 ′ and M 6 ′ are each independently selected from the group consisting of hydrogen, hydroxy, amino, aldehyde group, carboxy, acyl, halogen atoms, —R 1 and —OR 2 , wherein R 1 and R 2 are each independently a C 1 -C 10 hydrocarbyl, which is unsubstituted or substituted by a substituent selected from the group consisting of hydroxy, amino, aldehyde group, carboxy, acyl, halogen atoms, C 1 -C 10 alkoxy and heteroatoms; and wherein, when among M 1 -M 6 and M 1 ′-M 6 ′, any two adjacent groups on the same phenyl ring are each independently selected from the group consisting of R 1 and —OR 2 , the two adjacent groups may optionally be linked to form a ring, with a proviso that M 1 , M 2 , M 3 , M 4 , M 5 , M 6 , M 1 ′, M 2 ′, M 3 ′, M 4 ′, M 5 ′ and M 6 ′ are not simultaneously hydrogen.

Catalyst carrier as well as preparation method and application thereof

The invention relates to a catalyst carrier as well as a preparation method and application thereof. The carrier comprises an inorganic oxide and a polymer. The carrier has good particle morphology, adjustable particle size, high specific surface area and pore volume and relatively large pore diameter, and the loading capacity of the catalyst can be improved, so that the activity of the catalyst in olefin polymerization is improved.

A catalyst component for olefin(co)polymerization, preparation thereof, a catalyst comprising the same and use thereof

Spare power automatic switching logic test method for verifying automatic switching modes of high voltage side buscouple switch

The invention relates to the technical field of substation equipment inspection and discloses a spare power automatic switching logic test method for verifying automatic switching modes of a high voltage side buscouple switch. The method comprises the following steps of: setting an experiment initial state, namely setting mimic-disconnecting switch modules 1DL to 4DL to be switched on; setting a test state, namely pushing an experimental switch AN3 to a disconnecting position to make a mimic-mutual inductor module 3 PT act to ensure that alternating currents are not generated; detecting logic actions of a spare power automatic switching device to switched off mimic-disconnecting switch modules 1DL and 5DL to make the mimic-mutual inductor module 3PT act to ensure that alternating currents are generated; and operating the detected spare power automatic switching device. By the method, the spare power automatic switching functions of buscouple spare power switching of a transmission line ...

Catalyst component for ethylene polymerization and catalyst thereof

The invention relates to a catalyst for ethylene polymerization. The catalyst comprises: A. a titanium-containing solid catalyst component, which is obtained by: dissolving magnesium halide in an organic epoxy compound and an organic phosphorus compound, then adding an electron donor compound to form a uniform solution, in the presence of an assistant precipitation agent, mixing the solution with a halide of titanium or its derivative, and conducting washing and drying to obtain a solid a; reacting a silicon compound with the solid a in an inert solvent, and performing washing and drying; and B. an organic aluminum compound with a general formula of AlRnX3-n, wherein n is alkyl with a hydrogen or carbon atom number of 1-20, X is an halogen atom, and n is an integer larger than 0 and smaller than or equal to 3. The catalyst component can have high catalyst activity and high hydrogen regulation sensitivity when it is applied to ethylene polymerization, and the obtained polymer can have a ...

Spare power automatic switching logic test method for checking automatic switching mode of low-pressure side section switch

The invention relates to the technical field of substation equipment inspection, disclosing a spare power automatic switching logic test method for checking an automatic switching mode of a low-pressure side section switch. The test wire of a tester is accessed and the initial state of the experiment begins; experiment switches AN1 to AN4 are pushed to conduction positions; manual operation simulation breaker modules 1DL, 2DL, 3DL and 4DL are set to be in a close state; the operation of the automatic switching device is detected; the simulation breaker modules 1DL, 2DL, 3DL and 4DL are disconnected; the simulation mutual inductor acts; and the tested device can operate if the space automatic switching logic function can correctly conform to the requirement. The spare power automatic switching logic test method can be used for simulating the space automatic switching function of 10KV bus bar spare switching in the space automatic switching, is convenient to measure the protective constant ...

Polymerization of ethylene catalyst component having high output ratio, preparation and use

The invention relates to a catalyst component used for the ethylene polymerization or the co-polymerization, the preparation method thereof, and the application of catalyst comprising the catalyst component in the ethylene polymerization or co-polymerization. The catalyst component is formed by loading at least one inorganic titanium compound, at least one organic compound, at least one electron donor, and at least one activator on a magnesium/titanium-containing solid. The invention provides a high-efficiency high-hydrogen-sensitivity solid catalyst component capable of acquiring low fine powder content polymer. The catalyst component has the advantages of relatively narrow particle size distribution, smaller average particle size, and higher catalyst activity, and is suitable for the slurry polymerization or gas phase polymerization of ethylene, and particularly suitable for a gas phase fluidized bed polymerization process of ethylene by feeding the catalyst in the form of slurry. Meanwhile ...

Catalyst component for ethylene slurry polymerization reaction, and catalyst thereof

The present invention relates to a catalyst component for an ethylene slurry polymerization reaction, a catalyst component preparation method and a catalyst of the catalyst component, wherein the catalyst component comprises reactants of a magnesium-alcohol adduct, a titanium compound, an organic aluminum compound, an ester compound, and a halogenated ester compound. The catalyst has high activity and good copolymerization capability, and is suitable for the ethylene slurry polymerization reaction.

Catalyst for propene polymerization

The invention provides a catalyst for propene polymerization, which comprises the following components: A, a titanium-containing solid catalyst component, B, an alkylaluminium compound, and C, an organosilicone compound; and the invention also provides a method for preparing the titanium-containing solid catalyst component A. The titanium-containing solid catalyst component comprises titanium, magnesium, halogen, a surface modifier and a polyol ester compound with a special structure, or the polyol ester compound with the special structure which is taken as an electron doner and an electron doner compound with another structure are reasonably compatible with each other and are used in a catalyst system which is modified by the surface modifier to prepare a catalyst component and a catalystwith better comprehensive performance. Particularly, the catalyst provided by the invention shows high polymerization activity and stereospecificity when used for olefin polymerization, in particularthe ...

Catalyst ingredient used for ethylene polymerization, and catalyst thereof

The invention relates to a catalyst used for ethylene polymerization. The catalyst comprises following ingredients, A, a titanium-containing solid catalyst ingredient, and B, an organic aluminium compound. The titanium-containing solid catalyst ingredient is prepared by following steps: magnesium halide is dissolved in an organic epoxy compound and an organic phosphorous compound; an electron donor compound is added so as to obtain a uniform solution; a silica compound and a precipitation accessory ingredient are added; and an obtained mixture is mixed with a halide or a derivative of titanium so as to obtain the titanium-containing solid catalyst ingredient; general formula of the organic aluminium compound is AlRX<3-n>, wherein R is used for representing alkyl with 1 to 20 hydrogen or carbon atoms, X is used for representing halogen atom, and n is an integer, 0 Подробнее

Trustworthy computing base cutting method used for virtual machine system

The invention discloses a trustworthy computing base anti-leakage cutting method used for a virtual machine system; the virtual machine system comprises a hardware layer, a virtual machine monitor layer, a virtual trusted platform module manager, a domain creating module, a kernel and a sensitive data access policy; the virtual trusted platform module manager, the domain creating module, the kernel and the sensitive data access policy are positioned at a privilege domain; the method is characterized in that: a special user domain which is isolated with the privilege domain is built, the virtual trusted platform module manager, the domain creating module and the sensitive data access policy are moved to the special user domain, and the kernel is kept in the privilege domain; communication is built between the privilege domain and the special user domain, and the trustworthy computing base is formed by the hardware layer, the virtual machine monitor layer, the virtual trusted platform module ...

Cigarette heating dynamic draw resistance detection device

The invention discloses a heating cigarette dynamic draw resistance detection device, and belongs to the technical field of heating cigarette detection. The heating cigarette dynamic suction resistance detection device comprises a cabinet, a heating smoking set clamping mechanism, a heating cigarette holder and a suction cylinder mechanism, the heating smoking set clamping mechanism, the heating cigarette holder and the suction cylinder mechanism are fixed to the cabinet, and the heating smoking set clamping mechanism is fixed to the upper portion of a panel of the cabinet and used for clamping a heating smoking set; the heating cigarette holder is fixed on the upper portion of the cabinet panel, one end of the heating cigarette holder is a cigarette holder sealing clamping port, and the other end of the heating cigarette holder is a negative pressure connector. The suction cylinder mechanism comprises a suction cylinder fixing seat, a piston cylinder base, a piston cylinder, a piston and ...

Catalyst component for olefin (co)polymerization, preparation thereof, a catalyst comprising the same and use thereof

The invention relates to a catalyst component for olefin (co)polymerization, to preparation thereof, to a catalyst comprising the same, and to use thereof in olefin (co)polymerization. The catalyst component of the invention comprises magnesium, titanium, halogen, inner electron donor compound, and alkoxy group derived from a surface modifier, wherein the content of the alkoxy group derived from the surface modifier is in a range of from 0.01 to 3 percent by weight, based on the weight of the catalyst component.

Green eyeshield intelligence LED table lamp is polluted in zero radiation zero

The utility model discloses a green eyeshield intelligence LED table lamp is polluted in zero radiation zero. The utility model discloses a LED table lamp includes: light source, closed type switch, DC power supply and current control component, the utility model discloses initial provide to use dark green light source as LED table lamp, the method of utilizing the tri colour LED lamp pearl of RGB to pass through hybrid modulation successfully mediate out dark green eyeshield chromatic light source, alleviates the fatigue of reader's eyes and uncomfortable effectively, can carry out continuously adjustable to light source luminance, satisfy the demand of different readers to different illumination brightness better, has disposed heat simultaneously and has released electric infrared inductor and photo resistance, humanized design intelligent function, the especially volume of saving energy that intelligent design is better to turning off the light, better concord the design motif of green ...

Catalyst ingredient and catalyst used for ethylene polymerization or copolymerization

The invention relates to a catalyst ingredient used for ethylene polymerization or copolymerization. The catalyst ingredient is characterized in that: the catalyst ingredient is obtained via loading a magnesium/titanium-containing solid material with at least one organic aluminium compound. The magnesium/titanium-containing solid material is selected as a carrier, so that when the catalyst ingredient is used for ethylene polymerization, catalyst activity and hydrogen response are relatively high; an obtained polymer is low in fine powder content; the catalyst ingredient is suitable for ethylene slurry polymerization or gas phase polymerization, and is especially suitable for ethylene gas phase fluidized bed polymerization technology in which the catalyst is charged in a slurry form.

Catalyst component used for propene polymerization and catalyst

The invention provides a catalyst used for olefin polymerization, particularly propene polymerization. A titanium-containing catalyst component A selects a polyol ester compound with a special structure as an auxiliary precipitator, simultaneously a polyol ester compound or a binary aromatic carboxylate compound taken as an electron doner is matched for application, the conventionally used auxiliary precipitator, namely a compound phthalic anhydride is saved, a reaction step of dissolving the auxiliary precipitator is saved, and the complexity of synthesizing the catalyst component is reduced,so that the catalyst preparing process is more easily controlled, the prepared catalyst shows exciting polymerization activity and stereospecificity when used for the propene polymerization, and thepolymer has less fine powder content and wide molecular weight distribution.

Prepolymerization catalyst for olefin polymerization and preparation method thereof

The invention provides a prepolymerization catalyst for olefin polymerization and a preparation method thereof. The prepolymerization catalyst is highly active during the polymerization. At the prepolymerization stage, beside the pressure and the hydrogen additional proportion, the prepolymerization temperature, varieties of alkylaluminium, the additional proportion of the alkylaluminium and the additional speed of a monomer are also controlled, thus the prepolymerization seriflux concentration of the catalyst can reach 10g/100ml, the particles of the prepolymerization catalyst do not agglomerate and adhere to walls. The finally generated polymerization powders do not agglomerate, the content of the fine powders is reduced obviously, the bulk density is high, and the liquidity is good.

Catalyst for propene polymerization

The invention provides a catalyst for propene polymerization, which comprises the following components: A, a titanium-containing solid catalyst component, B, an alkylaluminium compound, and C, an organosilicone compound; and the invention also provides a method for preparing the titanium-containing solid catalyst component A. The titanium-containing solid catalyst component comprises titanium, magnesium, halogen, a surface modifier and a polyol ester compound with a special structure, or the polyol ester compound with the special structure which is taken as an electron doner and an electron doner compound with another structure are reasonably compatible with each other and are used in a catalyst system which is modified by the surface modifier to prepare a catalyst component and a catalyst with better comprehensive performance. Particularly, the catalyst provided by the invention shows high polymerization activity and stereospecificity when used for olefin polymerization, in particular ...

Trustworthy computing base cutting method used for virtual machine system

The invention discloses a trustworthy computing base anti-leakage cutting method used for a virtual machine system; the virtual machine system comprises a hardware layer, a virtual machine monitor layer, a virtual trusted platform module manager, a domain creating module, a kernel and a sensitive data access policy; the virtual trusted platform module manager, the domain creating module, the kernel and the sensitive data access policy are positioned at a privilege domain; the method is characterized in that: a special user domain which is isolated with the privilege domain is built, the virtual trusted platform module manager, the domain creating module and the sensitive data access policy are moved to the special user domain, and the kernel is kept in the privilege domain; communication is built between the privilege domain and the special user domain, and the trustworthy computing base is formed by the hardware layer, the virtual machine monitor layer, the virtual trusted platform module ...

Pyramid universal stepless rolling line adjusting device and design method

The invention relates to a rolling line adjusting device and a design method. The rolling line adjusting device is characterized in that two output shafts of a worm reducer (6) are designed to be a left screw rod (4) and a right screw rod (4), a left pyramid sliding block (3) and a right pyramid sliding block (3) which are symmetrical are driven to slide along an upper tapered surface and a lower tapered surface by a left screw nut (5) and a right screw nut (5), thereby pushing and moving a lower wedge sliding block (12) to vertically downwards move so that the stepless rolling line adjustment is realized. The rolling line adjusting device is used for adjusting a rolling line during a large-stroke six-roll cold rolling operation, and has simple and compact structure, safe and reliable property, light weight, low cost, good rigidity, large adjustment amount, attractive appearance, and convenient maintenance.

Catalyst ingredient and catalyst used for ethylene polymerization or copolymerization

The invention relates to a catalyst ingredient used for ethylene polymerization or copolymerization. The catalyst ingredient is characterized in that: the catalyst ingredient is obtained via loading a magnesium/titanium-containing solid material with at least one inorganic titanium compound, at least one organic titanium compound, at least one electron donor compound, and at least one activator. The magnesium/titanium-containing solid material is prepared by following steps: a magnesium compound is dissolved in a solvent system containing an alcohol compound, an organic epoxy compound, and an organic phosphorous compound so as to obtain a uniform solution; a halide of transition metal titanium or a derivative thereof is added for mixing; and the magnesium/titanium-containing solid material is obtained via precipitation in the presence of a precipitation accessory ingredient mixture. The magnesium/titanium-containing solid material is selected as a carrier, so that when the catalyst ingredient ...

Catalyst ingredient used for ethylene polymerization, and catalyst thereof

The invention relates to a catalyst ingredient used for ethylene polymerization, a preparation method thereof, and a catalyst of the catalyst ingredient. The catalyst ingredient comprises a magnesium alcohol adduct, a titanium compound, a silicon compound, and a compound containing sulfonyl. The catalyst possesses polymerization activity suitable for ethylene gas phase polymerization, and relatively excellent hydrogen response; and bulk density of obtained polymers is high.

Catalyst component for olefin polymerization, catalyst containing catalyst component as well as preparation method and application of catalyst component

The invention belongs to the field of catalysts, and provides a catalyst component for olefin polymerization and a catalyst containing the same. The catalyst component comprises an inorganic oxide and an alkyl cyclosilazane compound, the alkyl cyclosilazane compound is a reaction product of magnesium halide, titanium halide, an alkyl cyclosilazane compound and an electron donor compound, and the catalyst component is used for preparing a catalyst product for olefin polymerization. The polymer prepared by adopting the catalyst product has higher melt index, low hexane extractable product content and low oligomer content.

Catalyst carrier for olefin polymerization as well as preparation method and application of catalyst carrier

The invention relates to a catalyst carrier for olefin polymerization as well as a preparation method and application of the catalyst carrier. The carrier comprises an inorganic oxide, a polymer and an organic aluminum compound. The carrier has good particle morphology and high particle size adjustability, and can meet the production requirements of different process devices. And the effective loading capacity of the cocatalyst is high, so that waste can be effectively avoided.

Catalyst ingredient used for ethylene polymerization, and catalyst thereof

The invention relates to a catalyst ingredient used for ethylene polymerization, and a catalyst of the catalyst ingredient. The catalyst ingredient comprises following ingredients: (1) a magnesium alcohol adduct, (2) a titanium compound, (3) an isocyanate compound, and (4) a compound containing sulfuryl; the magnesium alcohol adduct is a chloride magnesium alcohol adduct with a general formula of MgCl<2>-mR<1>OH, wherein R<1> is used for representing alkyl with 1 to 4 carbon atoms, and m is used for representing a number ranging from 2.0 to 4.0; general formula of the titanium compound is Ti(OR<2>)X<4-n>, wherein R<2> is used for representing alkyl with 1 to 8 carbon atoms, X is used for representing a halogen atom, and 0<=n<=4; general formula of the isocyanate compound is OCNR<3>NCO, wherein R<3> is used for representing aliphatic hydrocarbon or aryl with 5 to 23 carbon atoms. The catalyst possesses polymerization activity suitable for ethylene gas phase polymerization; and bulk density ...

Catalyst component for olefin (Co)polymerization, preparation thereof, a catalyst comprising the same and use thereof

The invention relates to a catalyst component for olefin (co)polymerization, to preparation thereof, to a catalyst comprising the same, and to use thereof in olefin (co)polymerization. The catalyst component of the invention comprises magnesium, titanium, halogen, inner electron donor compound, and alkoxy group derived from a surface modifier, wherein the content of the alkoxy group derived from the surface modifier is in a range of from 0.01 to 3 percent by weight, based on the weight of the catalyst component.

Organosilylsulfane catalyst composition, olefin polymerization catalyst as well as preparation method and application of organosilylsulfane catalyst composition and olefin polymerization catalyst

The invention relates to the field of olefin polymerization catalysts, in particular to an organosilylsulfane catalyst composition, a catalyst containing the organosilylsulfane catalyst composition and a preparation method of the organosilylsulfane catalyst composition. The main components contained in the organic silylsulfane catalyst composition comprise the metal catalytic component and the silylsulfane compound, so that the catalyst containing the organic silylsulfane catalyst composition has higher activity. The main components are loaded on an inorganic oxide carrier with a specific particle size range to obtain the high-dispersity catalyst, the catalyst can be used for olefin polymerization reaction, a polymer obtained through polymerization has a high melt index, and the content of oligomers in the polymer is low.

Cyclosiloxane-containing catalyst component for olefin polymerization as well as preparation method and application of cyclosiloxane-containing catalyst component

The invention relates to the field of olefin polymerization catalysts, and discloses a cyclosiloxane-containing catalyst component as well as a preparation method and application thereof. The catalyst component contains a metal/cyclosiloxane compound, the metal/cyclosiloxane compound is loaded on a superfine inorganic oxide carrier to form the high-dispersity catalyst component, the catalyst component is used for olefin polymerization reaction after being activated, and a prepared polymer has high melt index and low oligomer content.

Solid catalyst component for polymerization of ethylene, preparation thereof and a catalyst containing the same

The present invention provides a catalyst component used for homopolymerization or co-polymerization of ethylene, comprising at least one suitable electron donor compound supported on a composition containing magnesium and titanium, wherein the electron donor compound is selected from the group consisting of aliphatic ethers, alicyclic ethers, aromatic ethers, aliphatic ketones and alicyclic ketones, and wherein the composition containing magnesium and titanium is prepared by dissolving a magnesium compound into a solvent system to form a homogeneous solution and then contacting the solution with a titanium compound in the presence of a precipitation aid to precipitate the composition. The present invention also relates to a method for the preparation of said catalyst component and a catalyst comprising thereof, and to use of the catalyst in homopolymerization of ethylene or co-polymerization of ethylene with at least one C 3 -C 8 α-olefln.

Olefin polymerization catalyst comprising cyclotriveratrylene and derivatives thereof

The present invention discloses a Ziegler-Natta catalyst system for olefin polymerization, comprising at least one compound represented by formula (I) as (i) an internal electron donor, (ii) an external electron donor, or (iii) the both, wherein M1, M2, M3, M4, M5, M6, M1′, M2′, M3′, M4′, M5′ and M6′ are each independently selected from the group consisting of hydrogen, hydroxy, amino, aldehyde group, carboxy, acyl, halogen atoms, —R1 and —OR2, wherein R1 and R2 are each independently a C1-C10 hydrocarbyl, which is unsubstituted or substituted by a substituent selected from the group consisting of hydroxy, amino, aldehyde group, carboxy, acyl, halogen atoms, C1-C10 alkoxy and heteroatoms; and wherein, when among M1-M6 and M1′-M6′, any two adjacent groups on the same phenyl ring are each independently selected from the group consisting of R1 and —OR2, the two adjacent groups may optionally be linked to form a ring, with a proviso that M1, M2, M3, M4, M5, M6, M1′, M2′, M3′, M4′, M5′ and M6′ are not simultaneously hydrogen.

Catalyst component for olefin polymerization or copolymerization,preparation method thereof, catalyst containing said catalyst component and use thereof

The invention relates to a catalyst component for olefin (co)polymerization, to preparation thereof, to a catalyst comprising the same, and to use thereof in olefin (co)polymerization. The catalyst component of the invention comprises magnesium, titanium, halogen, inner electron donor compound, and alkoxy group derived from a surface modifier, wherein the content of the alkoxy group derived from the surface modifier is in a range of from 0.01 to 3 percent by weight, based on the weight of the catalyst component.

Catalyst component for olefin polymerization or copolymerization,preparation method thereof, catalyst containing said catalyst component and use thereof

Catalyst component for olefin polymerization or copolymerization,preparation method thereof, catalyst containing said catalyst component and use thereof

A catalyst component for olefin polymerization or copolymerization, preparation method thereof, catalyst containing said catalyst component and the use thereof in the olefin polymerization or copolymerization. The inventive catalyst component contains magnesium, titanium, halogen, internal electron donor and alkoxy derived from surface modifier, wherein the content of said alkoxy derived from surface modifier is 0.01 to 3 by weight, based on the weight of catalyst component.

Simple detachable speed reducer oil filter

本实用新型涉及简易可拆式减速机滤油器，包括顶面开放，底面设有排油孔，侧面设有进油孔的滤油盒体，滤油盒体通过减速机上盖开孔伸入减速机内部，滤油盒体与减速机上盖开孔处可拆卸连接；在滤油盒体内放置过滤主体，所述过滤主体包括顶面开口的滤杯以及与滤杯固接的把手，滤杯的底面覆盖在排油孔上；在滤油盒体的内部设有与进油孔相对的导油板，导油板与减速机上盖开孔处可拆卸连接，导油板与滤油盒体之间形成滤杯移出通道。巧妙利用润滑油重力作用，轻松实现润滑油过滤，不仅零耗能，可靠性高，而且滤油器清理简单，节省工作量。

Knife head assembly of a novel medical electrotome and a novel medical electrotome

The present invention provides a knife head assembly of a novel medical electrotome and a novel medical electrotome. The knife head assembly comprises a snare ring and a cutting knife, the cutting knife comprises a knife handle fixedly connected to a distal end of the snare ring and a knife head fixedly connected to a distal end of the knife handle; the surface of the knife handle is provided with two grooves that are arranged symmetrically and extend in a length direction of the knife handle, the knife handle is further provided with a through-hole penetrating through the knife handle, the two ends of the through-hole are in communication with the two grooves respectively, the distal end of the snare ring is inserted through the through-hole, and the parts of the snare ring on the two sides of the through-hole are limited in the grooves, thus the distal end of the snare ring is embedded and fixed in the knife handle. In the present invention, the snare ring and the cutting knife are mechanically fixed in an embedded manner, and the distal end of the snare ring is inserted and embedded in the knife handle of the cutting knife; the fixed connection structure is stable and reliable, effectively prevents the cutting knife from falling off from the distal end of the snare ring accidentally, and thereby improves the safety of surgical operations.

Catalyst component for olefin polymerization or copolymerization and preparation method therefor, and application

The present disclosure relates to olefin polymerization catalysts, and discloses a catalyst component for olefin polymerization or copolymerization and a preparation method therefor, and a catalyst and an application thereof. The catalyst component for olefin polymerization or copolymerization in the present disclosure comprises titanium element, magnesium element, an electron donor, an organic silicon polymer, and an inorganic oxide support, wherein the molecular composition of the organic silicon polymer is [R x SiO (4-x)/2 ] m , wherein R is selected from alkyl, aryl, vinyl or oxygen, x is 0 or more and 2 or less, and the value of m makes the number-average molecular weight of the organic silicon polymer be 1×10 3 -1×10 6 g/mol. The catalyst has the characteristics of high activity, good hydrogen-regulating copolymerization performance, high bulk density of resulting polymer powder, and a low content of fine powder in the polymer powder when applied to olefin polymerization, particularly to ethylene and α-olefin polymerization.

Catalyst component for olefin polymerization or copolymerization and preparation method therefor, and application

The present disclosure relates to olefin polymerization catalysts, and discloses a catalyst component for olefin polymerization or copolymerization and a preparation method therefor, and a catalyst and an application thereof. The catalyst component for olefin polymerization or copolymerization in the present disclosure comprises titanium element, magnesium element, an electron donor, an organic silicon polymer, and an inorganic oxide support, wherein the molecular composition of the organic silicon polymer is [RxSiO(4-x)/2]m, wherein R is selected from alkyl, aryl, vinyl or oxygen, x is 0 or more and 2 or less, and the value of m makes the number-average molecular weight of the organic silicon polymer be 1×103-1×106 g/mol. The catalyst has the characteristics of high activity, good hydrogen-regulating copolymerization performance, high bulk density of resulting polymer powder, and a low content of fine powder in the polymer powder when applied to olefin polymerization, particularly to ethylene and α-olefin polymerization.

Catalyst component for olefin polymerization or copolymerization and preparation method therefor, and application

Olefin polymerization catalyst comprising cyclotriveratrylene and derivatives thereof

Syklotriveratryleeniä ja sen johdannaisia käsittävä olefiinipolymerointikatalyytti