Method for realizing continuous hydrolysis in production process of hydroxyl ethylidene diphosphonic acid

The invention provides a method for realizing continuous hydrolysis of acetylated hydroxyl ethylidene diphosphonic acid in the production process of hydroxyl ethylidene diphosphonic acid. The method comprises the following steps: phosphorus trichloride and glacial acetic acid are subjected to continuous tubular reaction and then enter a gas liquid separator to be separated, and a liquid-phase intermediate product acetylated hydroxyl ethylidene diphosphonic acid is sprayed from the top of a hydrolysis tower and encounters water vapor which ascends from the bottom of the tower to perform hydrolysis. The process realizes continuous hydrolysis of the acetylated hydroxyl ethylidene diphosphonic acid, and the obtained product has high quality and stable performance.

Process for arsenic removal of 1-hydroxy ethylidene-1,1-diphosphonic acid

The invention discloses a process for the arsenic removal of 1-hydroxy ethylidene-1,1-diphosphonic acid, which ensures low production cost. The process comprises the following operating steps of: adding 400 to 1,000 weight parts of 1-hydroxy ethylidene-1,1-diphosphonic acid free from arsenic removal treatment into a reaction kettle, introducing vapor to adjust the temperature of the material in the kettle to 20 to 70 DEG C by using a reaction kettle clamping sleeve, adding 0.1 to 1 weight part of phosphorus pentasulfide serving as an arsenic removal agent, adding 0.2 to 2 weight parts of activated carbon, washing a charging hole by using 0.5 to 2 weight parts of pure water after the charging is finished, preserving the heat for 1 to 5 hours at the temperature of 20 to 70 DEG C, filtering the 1-hydroxy ethylidene-1,1-diphosphonic acid (HEDP), heating the filtered clean 1-hydroxy ethylidene-1,1-diphosphonic acid to 80 DEG C, performing external evaporation for 1 to 3 hours under negative ...

Novel polymer water treatment reagent and synthesis method thereof

The invention provides a synthesis method of a novel polymer water treatment reagent. The polymer is synthesized by copolymerization of maleic anhydride and isopropenyl phosphonic acid in a solvent. With excellent thermal decomposition resistance, the polymer can be widely applied in industrial recycling cooling water of steel, electric power, fertilizer, petrochemical and other industries, as well as boiler, oilfield water injection and other fields.

Process for removing arsenic from diethylene triamine penta(methylene phosphonic acid) (DTPMPA)

The invention provides a process for removing arsenic from diethylene triamine penta(methylene phosphonic acid) (DTPMPA). The process has the advantage of low production cost and comprises the following steps: adding 400-1000 parts by weight of DTPMPA which does not undergo arsenic removal treatment to a reaction kettle, pumping steam from the jacket of the reaction kettle to adjust the temperature of the materials in the kettle to 20-70 DEG C, then adding 0.1-1 part by weight of arsenic removing agent phosphorus pentasulfide, then adding 0.2-2 parts by weight of active carbon, washing the charging hole with 0.5-2 parts by weight of pure water after charging and then preserving the heat in the temperature range of 20-70 DEG C for 1-5 hours; and later filtering the DTPMPA, heating the clean DTPMPA after filtration to 80 DEG C, externally steaming the clean DTPMPA under negative pressure for 1-3 hours, before completing external steaming, firstly analyzing the activity, adding pure water ...

Preparation method of low-chloride low-ammonia amino trimethylene phosphonic acid

The invention provides a preparation method of low-chloride low-ammonia amino trimethylene phosphonic acid. A synthesis method comprises the steps of adding phosphorous acid and ammonium chloride into a reaction kettle, increasing the temperature, dropwise adding formaldehyde and maintaining backflow; after dropwise adding, preserving heat in a backflow state; after the heat preservation, performing negative-pressure external steaming until the solid content is over 80%; adding reverse osmosis water, increasing the temperature and performing negative-pressure external steaming until the solid content is over 80%; repeating the steps; after the product is qualified by detection, adding water for dilution until the solid content meets the requirement. The amino trimethylene phosphonic acid prepared by the method provided by the invention has the characteristics of low chloride content and low ammonia content (the content of chlorides based on Cl<-1> is less than or equal to 0.5%, and the ...

Preparation method of non-noble metal catalyst for cathode of proton exchange membrane hydrogen-oxygen fuel cell

The invention provides a preparation method of a non-noble metal catalyst for a cathode of a proton exchange membrane hydrogen-oxygen fuel cell. The catalyst is a CoNi-coated N-GCNTs composite material. The preparation method comprises the following steps: preparing a melamine-Co < 2 + >/Ni < 2 + > complex precursor, calcining and carrying out acid leaching; the calcining method comprises the steps of calcining a melamine-Co < 2 + >/Ni < 2 + > complex precursor in a nitrogen atmosphere, cooling and collecting to obtain black powder, and the acid leaching method comprises the steps of dispersing the black powder in a 0.9-1.1 mol/L hydrochloric acid aqueous solution, carrying out acid leaching at 48-52 DEG C for 11.5-12.5 hours, centrifuging, washing, drying and grinding to obtain the CoNi-coated N-GCNTs composite material. The catalyst prepared by the invention shows high catalytic activity and good long-term durability in an alkaline environment medium oxygen reduction reaction, does not ...

Efficient slime stripping sterilizing agent and preparation method thereof

The invention discloses an efficient slime stripping sterilizing agent which comprises three parts of quaternary ammonium salt, sulfonate and a nonionic hydrophilic group. A preparation method of the efficient slime stripping sterilizing agent comprises steps as follows: 1, tertiary amine is added into a reactor, and epichlorohydrin is dropwise added to obtain epoxy propyl ammonium chloride for standby; 2, p-styrenesulfonate/propenyl sulfonate is added into the reactor, deionized water is added, the PH value of the system is adjusted by a sodium hydroxide solution, 30% of hydrogen peroxide is added, and the mixture reacts to obtain epoxy ethylbenzene sulfonate/glycidyl sulfonate; and 3, the epoxy propyl ammonium chloride and fatty alcohol/alkylphenol polyoxyethylene glycidyl ether are added into the reactor of the step 2 to obtain ternary ring-opening co-polymer containing quaternary ammonium salt, sulfonate and the nonionic polyether group. The sterilizing agent can permeate into stubborn ...

High-efficiency sterilization composition of circulating water system

A high-efficiency sterilization composition of a circulating water system comprises the following ingredients by weight percent: 50-90% of a chitosan N-hydroxypropyl polyoxyethylene ether dialkyl halide, 1-10% of a releasing stuck agent and the balance being deionized water. In a structural formula of the chitosan N-hydroxypropyl polyoxyethylene ether dialkyl halide, n refers to integer from 100 to 600, m refers to integer from 10 to 30, R refers to -CH3, -CH2CH3, -(CH2)2CH3, -(CH2), CH3 or -CH2C5H6, and X refers to Cl, Br or I. The composition disclosed by the invention has the advantages of being safe and environmentally-friendly, biodegradable, free from toxi and low in drug resistance, and can be used for performing rapid penetration, sterilization and peeling on intractable slime in a pipeline, so as to enable the slime to be dispersed in water and discharged out of the system with water flow.

Preparing process adapted for electronic grade solid hydroxyethylidene diphosphonic acid

Formaldehyde comprehensive utilization method in acidic industrial effluent

The invention relates to a method for comprehensively utilizing formaldehyde in acid industrial wastewater and manufacturing a scale inhibitor for water treatment. The method transforms the formaldehyde in the acid industrial wastewater into a methylene thiourea precipitate so as to be separated from the wastewater, thereby eliminating the pollution of the formaldehyde in the wastewater on environment and saving wastewater treatment cost. In addition, the precipitate is taken as a raw material of reaction so as to prepare the scale inhibitor for water treatment by adding in a certain amount of other chemical raw materials, which realizes the comprehensive utilization of resources. The method is applicable to the treatment and comprehensive utilization of formaldehyde-containing wastewaterproduced in organic phosphine industry and other acid industries.

Rosin-based grafted polyaspartic acid and preparation method thereof

The invention discloses rosin-based grafted polyaspartic acid and discloses a preparation method and application in water treatment of rosin-based grafted polyaspartic acid. The rosin-based grafted polyaspartic acid has a structure shown in the specification, wherein R is rosin amine dehydrogenation residue and has a structure shown in the specification. The method for preparing the polymer comprises the following steps: (a) performing pyrocondensation polymerization on maleic anhydride and ammonia water to form PSI polysuccinimide; (b) carrying out a grafting reaction between polysuccinimide and rosin amine; (c) finally adding a solution of sodium hydroxide for fully hydrolyzing. The rosin-based grafted polyaspartic acid is green and environment-friendly and has excellent performances in a high-hardness, high-alkalinity, high-PH value and high-concentration factor system.

Continuous production method of water processing agent aminotrimethylene phosphonic acid

A continuous production method of a water processing agent aminotrimethylene phosphonic acid comprises the following steps: adopting ammonium chloride, formaldehyde, and phosphorous acid as the raw materials, pumping the raw materials into a buffering and dropwise-adding tank from a storage tank, setting the flows of ammonium chloride, formaldehyde and phosphorous acid according to the weight ratio of raw materials in the reactions, pumping a certain amount of aminotrimethylene phosphonic acid into a first reactor as the reaction substrate, then opening a heating valve to heat the first reactor to a certain temperature so as to reflux the reaction substrate in the first reactor, opening a reaction material dropwise-adding valve at the same time, continuously adding materials under a controlled temperature; opening a material discharging valve of the first reactor so as to discharge the reaction mixed materials to a second reactor or a third reactor, when the fist reactor is full; maintaining ...

Polyaspartic acid copolymer water treatment agent and preparation method thereof

The invention discloses a preparation method of a polyaspartic acid copolymer water treatment agent. The method comprises the following operation steps: adding maleic anhydride and ammonium hydroxide to a reactor to heat and neutralize, and then carrying out high-temperature kneading thermal polycondensation reaction, so as to obtain solid gel poly succinimide; baking and crushing the obtained polysuccinimide into fine powder and floating in water, and adding tetrahydroglyoxaline to carry out grafting reaction; adding a certain amount of NaOH liquid to hydrolyze after reaction is ended; completely hydrolyzing when the pH value of the system is 10-12, so as to obtain a reddish brown copolymer liquid, namely the polyaspartic acid copolymer water treatment agent, wherein the molar ratio of the maleic anhydride to NH3.H2O is 1:(1.2-2), the neutralization temperature is 20-30 DEG C, the neutralization time is 0.5-2.5 hours, the pyrocondensation polymerization temperature is 160-220 DEG C, the ...

Preparation technology suitable for electronic grade solid ethylenediamine tetramethylene phosphonic acid

The invention discloses a production process of high-purity solid ethylene diamine tetra (methylene phosphonic acid). The production process comprises the following steps: (1) first-phrase preparation which is to clean related equipment; (2) dissolving orthophosphorous acid crystals in high-purity water for recrystallization, and obtaining high purity orthophosphorous acid for later use; (3) placing the high-purity orthophosphorous acid and hydrochloric acid into a reaction kettle with stirring and temperate raising, and dripping ethylene diamine into the reaction kettle; (4) dripping methyl alcohol and keeping temperature; (5) dripping crystal nucleating agent till crystals are precipitated; (6) raising temperature and continuing to dripping methyl alcohol; (7) decreasing temperature step by step; (8) centrifugation, drying, screening and packaging. The white solid particles of EDTMPA has a content of active EDTMPA of more than 95 percent, a content of arsenic less than 0.5 mg/L. The high-purity ...

Preparation technology suitable for electronic grade solid ethylenediamine tetramethylene phosphonic acid

The invention discloses a production process of high-purity solid ethylene diamine tetra (methylene phosphonic acid). The production process comprises the following steps: (1) first-phrase preparation which is to clean related equipment; (2) dissolving orthophosphorous acid crystals in high-purity water for recrystallization, and obtaining high purity orthophosphorous acid for later use; (3) placing the high-purity orthophosphorous acid and hydrochloric acid into a reaction kettle with stirring and temperate raising, and dripping ethylene diamine into the reaction kettle; (4) dripping methyl alcohol and keeping temperature; (5) dripping crystal nucleating agent till crystals are precipitated; (6) raising temperature and continuing to dripping methyl alcohol; (7) decreasing temperature step by step; (8) centrifugation, drying, screening and packaging. The white solid particles of EDTMPA has a content of active EDTMPA of more than 95 percent, a content of arsenic less than 0.5 mg/L. Thehigh-purity ...

Continuous production process for HTPMP

The invention relates to a continuous production process for HTPMP. The process comprises the following steps: adding a certain mole ratio of diethylenetriamine, phosphorous acid, formaldehyde and hydrochloric acid into a mixing kettle, and uniformly mixing under 35 DEG C; pumping into a tubular reactor; after reaction, entering a thermal insulation kettle for thermal insulation and full reaction; after detecting that the phosphorus content is qualified, reducing pressure and externally evaporating formaldehyde; finally, dropwise adding hydrochloric acid for lowering the temperature and diluting to the needed active matter content. The production process adopts continuous feeding and continuous discharging, overcomes the defects of low rate of production, large energy consumption and the like of the current intermittent single-kettle mixing production process, and increases the rate of equipment utilization. The production cycle is shortened, the capacity is increased, the comprehensive ...

Method for producing acetyl tributyl citrate by using acetyl chloride

The invention discloses a method for producing acetyl tributyl citrate by using acetyl chloride. The method comprises the following steps: directly preheating tributyl citrate; dropwise adding acetyl chloride to react; introducing the generated hydrogen chloride into an absorption device to produce hydrochloric acid; and distilling remained acetyl chloride and hydrogen chloride to obtain an acetyl tributyl citrate product. The method is low in reaction temperature, does not use catalyst and is simple and practical, an acetylation reagent is small in dosage, and the difficulty of post-treatment can be reduced.

2-phosphonobutane-1,2,4-tricarboxylic acid production hydrolysis continuous technology

The invention discloses a 2-phosphonobutane-1,2,4-tricarboxylic acid production hydrolysis continuous technology. In a pentaester hydrolysis process, 2-phosphonobutane-1,2,4-tricarboxylic acid pentaester obtained by esterification addition is sprayed into a hydrolysis tower by a sprayer at the top of the hydrolysis tower, vapor is input into the hydrolysis tower from the bottom of the hydrolysis tower, the atomized 2-phosphonobutane-1,2,4-tricarboxylic acid pentaester contacts with raising vapor between tower plates and is hydrolyzed to produce a 2-phosphonobutane-1,2,4-tricarboxylic acid aqueous solution, the 2-phosphonobutane-1,2,4-tricarboxylic acid aqueous solution is collected at the tower bottom and is fed into a material storage tank, and the produced methanol is gasified and then is condensed by a condenser, and the condensate is fed into a methanol rectification kettle. The 2-phosphonobutane-1,2,4-tricarboxylic acid production hydrolysis continuous technology realizes continuous ...

Method for preparing polyaspartic acid by crystal condensation

The invention provides a preparation method of polyaspartic acid, which comprises the following steps: by taking maleic anhydride as a raw material, firstly, preparing ammonium salt of the maleic acid; crystallizing and centrifuging the ammonium salt, and then directly carrying out high-temperature melt polymerization under the catalytic action of organic phosphonic acid to obtain polysuccinimide; and finally, under the action of sodium hydroxide, hydrolyzing the polysuccinimide into sodium salt of polyaspartic acid to obtain a polyaspartic acid solution. In the technical processes of the invention, the ammonium salt of the maleic acid does not need to be converted into a solution for polymerization, thereby saving the energy consumption required for the necessary polysuccinimide drying process in the traditional method; in addition, the organic phosphonic acid is used as a catalyst which has the characteristics of mild reaction conditions and high conversin efficiency; and the prepared ...

New process for synthesizing polyaspartic acid through L-asparaginic acid

The invention discloses a new process for synthesizing polyaspartic acid through L-asparaginic acid. The method implements thermal condensation polymerization on L-asparaginic acid with or without presence of a catalyst to obtain polysuccinimide solid powder, and hydrolyzes under an alkaline condition to obtain polyaspartic acid. The process for synthesizing the polyaspartic acid disclosed by the invention is simple, low in cost, free from any 'three-waste' discharge and raw material loss, and consistent with a production concept of green chemistry. The polyaspartic acid prepared by the process disclosed by the invention is narrow in molecular weight distribution and light in color.

Preparation technology suitable for electronic grade solid hexamethylenediamine tetramethylene phosphonic acid

The invention relates to a process for preparing electronic grade hexamethylenediaminetetra (methylenephosphonic acid) solid. The process comprises the following steps: (1) first-phrase preparation which is to clean related equipment; (2) dissolving orthophosphorous acid crystals in high-purity water for recrystallization, and obtaining high purity orthophosphorous acid for later use; (3) placing the high-purity orthophosphorous acid and 30 percent hydrochloric acid into a reaction kettle with stirring and temperate raising, and dripping ethylene diamine into the reaction kettle; (4) raising temperature, dripping methyl alcohol and then keeping temperature; (5) after slight temperature drop, dripping crystal nucleating agent till crystals are precipitated; (6) raising temperature and continuing to dripping methyl alcohol; (7) decreasing temperature step by step; (8) centrifugation, drying, screening and packaging. The white solid particles of EDTMPA has a content of active EDTMPA of more ...

Preparation method for polyepoxy sodium succinate for water treatment

The invention relates to a preparation method for polyepoxy sodium succinate for water treatment. Maleic anhydride is hydrolyzed in water and alkaline environment; then one or two of sodium tungstate and sodium molybdate and hydrogen peroxide react in a tube-type reactor to generate epoxy sodium succinate; calcium hydroxide is added to react with the epoxy sodium succinate in the tube-type reactor at the temperature of 80-100 DEG C for 2-72 hours. The diameter of the tube-type reactor is phi 50-80 cm, and the length thereof is 30-200m. The obtained polyepoxy sodium succinate has stable product quality.

Method for preparing polyaspartic acid by crystal condensation

The invention provides a preparation method of polyaspartic acid, which comprises the following steps: by taking maleic anhydride as a raw material, firstly, preparing ammonium salt of the maleic acid; crystallizing and centrifuging the ammonium salt, and then directly carrying out high-temperature melt polymerization under the catalytic action of organic phosphonic acid to obtain polysuccinimide; and finally, under the action of sodium hydroxide, hydrolyzing the polysuccinimide into sodium salt of polyaspartic acid to obtain a polyaspartic acid solution. In the technical processes of the invention, the ammonium salt of the maleic acid does not need to be converted into a solution for polymerization, thereby saving the energy consumption required for the necessary polysuccinimide drying process in the traditional method; in addition, the organic phosphonic acid is used as a catalyst which has the characteristics of mild reaction conditions and high conversin efficiency; and the prepared ...

Lithium ion battery film negative electrode material and preparation method and application thereof

The invention discloses a lithium ion battery film negative electrode material and a preparation method and application thereof, and belongs to the technical field of lithium ion batteries. The preparation method specifically comprises the following steps: by taking carbon nanotubes, cobalt nitrate and 2-methylimidazole as raw materials and methanol as a solvent, ultrasonically mixing uniformly, heating, aging and reacting for 12-36 hours, filtering in vacuum after the reaction is finished to obtain a ZIF-67-coated CNTs membrane, and drying the ZIF-67-coated CNTs membrane; and carrying out high-temperature calcination on the dried ZIF-67 (at) CNTs film in a nitrogen atmosphere, cooling, putting into a mixed solution of concentrated sulfuric acid and water, heating for reaction, and then washing and drying to obtain the porous carbon/carbon nanotube lithium ion battery film negative electrode material. The porous carbon/carbon nanotube film is prepared by combining a vacuum filtration method ...

Method of preparing amino trimethylene phosphonic acid by virtue of triformol

The invention discloses a method of preparing amino trimethylene phosphonic acid by virtue of triformol. The method concretely comprises the steps: with phosphorous acid, ammonium chloride and the triformol as raw materials, adding the phosphorous acid and the ammonium chloride into a reaction kettle to be heated firstly, then adding the triformol in a graded way, rising the temperature to carry out reaction until the terminal point, carrying out negative pressure external steaming, absorbing tail gas, and carrying out dilution by water to the content needed by active matters. The process comprises the technological processes shown by attached drawings. With the adoption of the technological method, as the triformol is used to replace a liquid formaldehyde solution, the product aftertreatment and wastewater production are saved, and meanwhile, the problem that liquid formaldehyde is easy to self polymerize and not suitable to be stored is solved.

Preparation method of imidazoline ramification corrosion inhibitor

The invention relates to a preparation method of an imidazoline ramification corrosion inhibitor. The preparation method comprises the following operation steps: firstly mixing imidazoline and thiocarbamide, adding a solvent, and carrying out heating reaction in a nitrogen protection environment to obtain thiocarbamide-based imidazoline; then adding sulfanilic acid to obtain an imidazoline ramification; finally recrystallizing by using acetone or ethanol to obtain a straw yellow solid powder finished product, wherein the mole ratio of the imidazoline reacting with the thiocarbamide and the sulfanilic acid is 1:(0.9-1.2):(0.8-1.0); the solvent is xylene, and the addition amount is about 1.0-1.5 times of the volume of three raw material substances; the reaction temperature of the imidazoline and the thiocarbamide is 90-110 DEG C; the reaction time of the imidazoline and the thiocarbamide is 1-5 hours; the reaction temperature of the thiocarbamide-based imidazoline and the sulfanilic acid ...

Preparation method of efficient oxygen reduction catalyst

The invention provides a preparation method of an efficient oxygen reduction catalyst. The catalyst is Fe-N (C), the preparation method of the catalyst comprises the following steps: preparing Prussian blue, preparing a precursor material MIL-Fe, and calcining. The calcining method comprises the following steps: dissolving a precursor material MIM-Fe, glucose and urea in a mixed solvent of deionized water and ethanol, carrying out uniform ultrasonic dispersion, evaporating to remove the solvent, heating to 795-805 DEG C at a rate of 2.5-3.5 DEG C/min, carrying out heat preservation at 795-805 DEG C for 1.8-2.2 h, and cooling to room temperature to obtain the Fe-N (C) catalyst material. According to the Fe-N (C) catalyst material prepared by the method, the electrochemical activity and the stability of the catalyst are effectively improved.

Preparation method for polyepoxy sodium succinate for water treatment

The invention relates to a preparation method for polyepoxy sodium succinate for water treatment. Maleic anhydride is hydrolyzed in water and alkaline environment; then one or two of sodium tungstate and sodium molybdate and hydrogen peroxide react in a tube-type reactor to generate epoxy sodium succinate; calcium hydroxide is added to react with the epoxy sodium succinate in the tube-type reactor at the temperature of 80-100 DEG C for 2-72 hours. The diameter of the tube-type reactor is phi 50-80 cm, and the length thereof is 30-200m. The obtained polyepoxy sodium succinate has stable product quality.

Transportation container for industrial chemicals

The invention provides a transportation container for industrial chemicals. The transportation container comprises a moving structure, a collecting hopper, a lifting assembly, an overturning piece and a collecting structure. The moving structure drives the collecting hopper to move to the position beside chemical materials, the lifting assembly drives the collecting hopper to descend to make contact with the ground, the driving assembly drives the scraping plate to turn over to the vertical state, and the scraping plate transversely moves in the direction of the collecting hopper in the vertical state to scrape the chemicals on the ground to the collecting hopper. Then the driving assembly enables the scraping plate to turn over from the vertical state to the horizontal state, the scraping plate transversely moves in the direction away from the collecting hopper in the horizontal state to scrape the chemicals on the ground into the collecting hopper, the lifting assembly drives the collecting ...

Preparing process adapted for electronic grade solid aminotrimethylene phosphonic acid

Lithium iron phosphate battery positive electrode material and preparation method thereof

The invention discloses a lithium iron phosphate battery positive electrode material and a preparation method, the lithium iron phosphate battery positive electrode material comprises lithium iron phosphate and modified nano carbon black, and the weight ratio of the modified nano carbon black to the lithium iron phosphate is (0.1-5): 100; the modified nano carbon black is 3-oxo-5-polyethylene-7-methyl-8-trifluoroalkyl nano carbon black, the hydroxyl modified nano carbon black reacts with metal sodium to form sodium alkoxide, and the sodium alkoxide reacts with 1-halo-4-methyl-5-trifluoro-2-pentene to form alkyl nano carbon black containing vinyl. And then carrying out polymerization reaction, separation and purification to obtain the 3-oxo-5-polyethylene-7-methyl-8-trifluoroalkyl nano carbon black. The prepared modified nano carbon black forms a conductive network three-dimensional space for wrapping lithium iron phosphate, the property of the carbon black is changed under the action of ...

Efficient concrete water reducer and preparation method thereof

The invention provides an efficient concrete water reducer and a specific preparation method thereof. The preparation method comprises the following specific steps of grafting and modifying through sodium lignin sulfonate and maleic anhydride, then copolymerizing with crylic acid and polyoxyethylene monomethyl ether acrylate so as to obtain an intramolecularly compounded efficient concrete water reducer product with an anion structure and a nonionic structure. The concrete water reducer has prominent advantages that the amount of admixture is less and is 0.2-0.5% of the weight of binding material, the decrement rate is high and is more than or equal to 35%, has good enhancing effect on concrete, has large gas generating amount and uniform bubbles, does not react with aggregate due to low alkalinity, does not erode the passive film on the surface of a rebar due to low content of chlorine. The raw material of the concrete water reducer adopts waste residue of papermaking, so that the concrete ...

Method for synthesizing phosphorus-free corrosion-inhibition scale inhibitor for water treatment from natural products

The invention relates to a method for synthesizing a phosphorus-free corrosion-inhibition scale inhibitor for water treatment from natural products. The method uses maleic anhydride and other unsaturated carboxylic acids to carry out graft modification on natural products, including papermaking waste residue product lignosulphonate, starch and derivatives thereof, other polysaccharides and derivatives thereof, or humic acid, tannic acid and the like. The phosphorus-free corrosion-inhibition scale inhibitor comprises the following raw materials in portions by weight: 100-500 portions of unsaturated carboxylic acid, 20-400 portions of natural product, 0-100 portions of concentrated sulfuric acid, 0.001-50 portions of catalyst, 10-400 portions of oxydol and 100-2,000 portions of water. The product of the invention does not contain phosphorus or nitrogen, has favorable effects of corrosion and scale inhibition in a circulating cooling water system, and is an environmental-protection corrosion-inhibition ...

Bamboo-like carbon nanotube structure material Fe-CNT and application thereof in fuel cell

The invention belongs to the technical field of fuel cells, and particularly relates to a bamboo-joint-shaped carbon nanotube structure material Fe-CNT and application of the bamboo-joint-shaped carbon nanotube structure material Fe-CNT to a fuel cell. Aiming at the problems of transition metal and a carbon material catalyst in the catalytic oxygen reduction reaction of a fuel cell at the present stage, the invention provides a bamboo-like carbon nanotube structure material Fe-CNT, which is formed by mixing Prussian blue and melamine and then sintering in a tubular furnace. The adopted method is simple; one-step pyrolysis synthesis is performed; and the catalyst has a unique bamboo-like structure, and the structure has a larger specific surface area, so that the catalyst has more catalytic active sites. And the synthesized Fe-CNTs nano particles have very good electrocatalytic activity and relatively long stability.

Formaldehyde comprehensive utilization method in acidic industrial effluent

The invention relates to a method for comprehensively utilizing formaldehyde in acid industrial wastewater and manufacturing a scale inhibitor for water treatment. The method transforms the formaldehyde in the acid industrial wastewater into a methylene thiourea precipitate so as to be separated from the wastewater, thereby eliminating the pollution of the formaldehyde in the wastewater on environment and saving wastewater treatment cost. In addition, the precipitate is taken as a raw material of reaction so as to prepare the scale inhibitor for water treatment by adding in a certain amount of other chemical raw materials, which realizes the comprehensive utilization of resources. The method is applicable to the treatment and comprehensive utilization of formaldehyde-containing wastewater produced in organic phosphine industry and other acid industries.

Arsenic removal process for amino trimethylene phosphonic acid

The invention discloses an arsenic removal process for amino trimethylene phosphonic acid with low production cost. The process comprises the following operation steps of: adding 400 to 1,000 weight parts of amino trimethylene phosphonic acid not subjected to arsenic removal treatment into a reaction kettle, introducing steam into a reaction kettle jacket to regulate the temperature of the material in the kettle to be between 20 and 70 DEG C, then adding 0.1 to 1 weight part of phosphorus pentasulfide serving as an arsenic removal agent, adding 0.2 to 2 weight parts of active carbon, flushing the feeding hole by using 0.5 to 2 weight parts of pure water after the materials are completely added, and preserving the heat for 1 to 5 hours at the temperature of between 20 and 70 DEG C; and filtering the amino trimethylene phosphonic acid (namely ATMP), heating the filtered clean ATMP to the temperature of 80 DEG C, evaporating outside for 1 to 3 hours under negative pressure, analyzing the activity ...

Preparation technology suitable for electronic grade solid hexamethylenediamine tetramethylene phosphonic acid

The invention relates to a process for preparing electronic grade hexamethylenediaminetetra (methylenephosphonic acid) solid. The process comprises the following steps: (1) first-phrase preparation which is to clean related equipment; (2) dissolving orthophosphorous acid crystals in high-purity water for recrystallization, and obtaining high purity orthophosphorous acid for later use; (3) placing the high-purity orthophosphorous acid and 30 percent hydrochloric acid into a reaction kettle with stirring and temperate raising, and dripping ethylene diamine into the reaction kettle; (4) raising temperature, dripping methyl alcohol and then keeping temperature; (5) after slight temperature drop, dripping crystal nucleating agent till crystals are precipitated; (6) raising temperature and continuing to dripping methyl alcohol; (7) decreasing temperature step by step; (8) centrifugation, drying, screening and packaging. The white solid particles of EDTMPA has a content of active EDTMPA of more ...

Method for synthesizing phosphorus-free corrosion-inhibition scale inhibitor for water treatment from natural products

The invention relates to a method for synthesizing a phosphorus-free corrosion-inhibition scale inhibitor for water treatment from natural products. The method uses maleic anhydride and other unsaturated carboxylic acids to carry out graft modification on natural products, including papermaking waste residue product lignosulphonate, starch and derivatives thereof, other polysaccharides and derivatives thereof, or humic acid, tannic acid and the like. The phosphorus-free corrosion-inhibition scale inhibitor comprises the following raw materials in portions by weight: 100-500 portions of unsaturated carboxylic acid, 20-400 portions of natural product, 0-100 portions of concentrated sulfuric acid, 0.001-50 portions of catalyst, 10-400 portions of oxydol and 100-2,000 portions of water. The product of the invention does not contain phosphorus or nitrogen, has favorable effects of corrosion and scale inhibition in a circulating cooling water system, and is an environmental-protection corrosion-inhibition ...

Petal-shaped lithium battery negative electrode material rich in oxygen vacancies as well as preparation method and application thereof

The invention discloses a petal-shaped lithium battery negative electrode material rich in oxygen vacancies as well as a preparation method and application thereof, and belongs to the technical field of lithium ion battery materials. By taking cobalt nitrate, copper nitrate and dimethylimidazole as raw materials and water as a solvent, ultrasonically mixing, adding the treated carbon cloth, standing for 1 hour at 60 DEG C, washing and drying to obtain carbon cloth loaded CuCo-MOF; dissolving the carbon cloth loaded CuCo-MOF, ferric nitrate and urea in ethanol, carrying out a hydrothermal reaction, washing, and drying to obtain FeCuCo-LDH; feCuCo-LDH is placed in a sodium borohydride aqueous solution to be soaked, washed and dried to obtain the petal-shaped lithium battery negative electrode material rich in oxygen vacancies, the material retains an inherent porous structure of a parent MOF, more exposed active sites are provided, transportation of electrolyte ions is facilitated, meanwhile ...

Preparation method and application of flexible CuNi-P (at) graphene lithium ion battery thin film

The invention provides a preparation method of a flexible CuNi-P (at) graphene lithium ion battery thin film. The preparation method comprises the following steps: preparing a CHNs (at) graphene oxide film, preparing an HKUST-1 (at) graphene oxide film, preparing a CuNi-LDH (at) graphene oxide film, and preparing the flexible CuNi-P (at) graphene lithium ion battery thin film. The flexible graphene-based thin film is synthesized by combining a vacuum suction filtration method, a hydrothermal method and high-temperature calcination, the flexible CuNi-P (at) graphene lithium ion battery thin film electrode is formed by introducing an MOF precursor, the Li ion migration efficiency can be effectively promoted by combining MOF-derived porous CuNi-P with graphene, the expansion coefficient of a negative electrode material is reduced, and the improvement of electrochemical performance is promoted.