Method for synthesizing carbanilate by using non-phosgene path

Under the moderate reaction condition and under the condition of proper reaction temp. and reaction time a certain quantity of catalyst and adjuvant is added, and the formate can be substituted for CO and alcohol to implement reduction carbonylation reaction of nitrobenzene and high-selectively synthesize phenylaminoformate.

Method for preparing methyl 4-(4'-aminophenylmethylene)phenylaminoformate

The invention discloses a preparation method for 4-(4'-aminophenylmethylene) methyl N-phenylcarbamate. Methyl carbonate, diaminodiphenylmet hanes, solvent and catalyst are added into a reactor, the air in the reactor is replaced by aerating nitrogen, the self-pressure lifting is made at the reaction temperature between 150 and 180 DEG C, the reaction is made for 0.5 to 4 hours under the stirring, the mixture obtained after the reaction is filtered, then crystallization solvent is used to make two to three recrystallizations to the filter cake, white crystalloid solids precipitated at 30 DEG C are taken, and the solids are the target product. The method has the advantages of low cost, no pollution and simple preparation.

Production process of phenyl carbamide and/or diphenyl carbamide

Double metal cyanide catalyst and its prepn. method

The present invention relates to a bimetallic cyanide catalyst, its composition is Zn3[Co(CN)6]2.aZnCl2.bH2O.cL.dL', in which L is an organic alcohol, L' is an organic ether, it uses a mixture of etherl alcohol to treat a mixture of zinc salt and hexacyanocobaltate to obtain precipitate which is then washed, vacuum dried to obtain the catalyst. Said bimetallic cyanide catalyst is easy to separateout from polyetherpolyol, low in application concn, simple in prepn. method, and can synthesize low unsaturated polyethylerpolyol under wide temp. range.

Polyurethane-base composite soft ceramics and its preparing process

A polyurethane-base composite soft ceramic is prepared from detwatered binary alcohol, MDI, binary chain-extending agent, ternary chain-extending agent, rigid particles and coupling agent. Its advantages include improved mechanical performance and low cost. It can be used for friction disk with excellent performance.

Method for preparing polyether ester polyalcohol

A process for preparing polyether polyol includes such steps as proportionally adding micromolecular polyether, cyclic acid anhydride and catalyst to high-pressure reactor, vacuumizing, filling N2, heating to 50-200 deg.c, adding epoxy compound and polymerizing. Its advantage is high transform rate.

Prepn. process of polyurethane-based friction disk

A method for preparing polyurethane-base friction disk includes adding catalyst to ordinary polyurethane (MDI) as basic raw material, tripolymerization, reaction on dewatered binary alcohol to obtainprepolymer with high content of hard block, mixing it with refractory inorganic filler, addition of mixed chain-extending agent, reaction, casting, closing mould, pressurization and sulfurization. Its advantages are low cost as cheaper MDI is used, instead of expensive NDI and simple process.

Double metal cyanide catalyst and its prepn. method

Catalyst for catalytic purifying car tail gas and preparation process thereof

The composition of the catalyst for catalytic cleaning tail gas of car contains: honeycomb ceramics: gamma-Al2O3:La2O3:CeO2:Pd=16-18.35:1.65-4:0.165-1.25 :0.0825-1:0.02-0.2. The invented catalyst possesses good low-temp. activity and high-temp. stability, and can greatly solve the cold-starting and sintering problems of tail gas discharge of car, it is applicable to wider air-fuel ratio range, and can broaden operation window.

Process for preparing polycrystalline yttrium aluminate fibre

The present invention provides a preparation process of polycrystalline yttrium aluminate fiber. Stable yttrium aluminate sol is first prepared by using inorganic yttrium salt and aluminium as basic material, water as solvent and certain amount of organic acid as catalyst; the sol is mixed with proper amount of polymer spinning assistant, concentrated into spinning fluid with certain rheological property and blown into sol fiber. The sol fiber is further processed through low temperature drying, middle temperature hydrothermal processing and high temperature roasting to produce polycrystalline yttrium aluminate fiber. The produced fiber has homogeneous diameter and no slag balls and is flexible and bridge.

Double metal cyanide catalyst and its prepn. method

Method and equipment for producing graphitized fiber

Method for preparing acyclic oligomeric polyhydric alcohol carbonate

The process of preparing aliphatic carbonate polyol oligomer includes the following steps: feeding aliphatic polyol and catalyst in the amount of 0.01-2 wt% of aliphatic polyol into a reactor and heating to the reaction temperature 100-200 deg.c; adding organic carbonate monomer in the molar ratio to the aliphatic polyol of 1 to 0.1-10 into the reactor; reaction for 3-24 hr; decreasing the pressure from normal pressure to 10-10<5> Pa; and reaction at 120-200 deg.c for 2-10 hr. During the process, one kind of no toxicity and low consumption catalyst without adverse influence on the product is applied. The preparation process is simple and low in cost, and the aliphatic carbonate polyol oligomer product has high quality.

Mixing type nonisocyanate polyurethane and preparation method thereof

The invention relates to hybrid non-isocyanate polyurethane which is prepared through adopting the following method: epoxidized soybean oil and weak base catalyst are added in a reaction kettle, and then carbon dioxide gas is pumped in; at the action of reaction temperature, reaction pressure and stirring, reaction is started, and cyclic carbonate is generated after the reaction; the cyclic carbonate is mixed with epoxy resin and organic base catalyst is added; then, the mixture is mixed with primary amine compound so as to be formed into sheets; finally, sulfuration is carried out under the condition of sulfuration with the product placed for 7 to 9 days at room temperature. The hybrid non-isocyanate polyurethane has the advantages that: the hybrid non-isocyanate polyurethane is synthesized through the mixing and the reaction of natural regenerable vegetable resource and epoxy resin, thereby reducing the dependence on petrochemical resource, making full use of the regenerable vegetable ...

Simple preparation process of bimetallic cyanide catalyst

Bimetallic cyanide is treated by organic gas to prepare the bimetalic cyanide catalyst. The preparation process is simple, low in organic gas consumption, high in efficiency and low in cost.

Catalyst used in preparation of N-substituted carbamate and preparation method and application thereof

The invention relates to a catalyst used in preparation of N-substituted carbamate and a preparation method and application thereof. The active ingredient of the catalyst is heteropolyacid, and the component of a catalyst carrier is metallic oxide or metalloid oxide. The catalyst provided by the invention can promote the reaction of carbamate and amine to prepare the N-substituted carbamate with high yield, and the reaction has relatively mild reaction conditions, high catalytic activity and reaction selectivity and relatively short reaction time; and the catalyst can be conveniently separated from a reaction system, can be reused, and is convenient for amplification and industrial application.

一种非光气路线合成苯胺基甲酸酯的方法

... 一种非光气路线合成苯胺基甲酸酯的方法，是在温和的反应条件下，在适宜的反应温度和反应时间下，加入一定量的催化剂和助剂，以甲酸酯代替CO和醇，完成硝基苯的还原羰基化反应，高选择性的合成苯胺基甲酸酯。本发明具有反应条件温和、操作规程简单、反应选择性好、反应转化率高等优点，是一种满足工业化需求、实用性很强的方法。 ...

Method for preparing dispersion liquid of aqueous polyurethane of diphenyl methane diisocyanate

Preparation method of urethane elastomer

A method of producing polyurethane elastomer is to dehydrate hydroxy-terminated polybutadiene and tetrahydrofuran in vacuum, which are then cooled to 20 to 50 DEG C and added to the melting dimethyl-methane isocyanate (MDI) according to the mole ratio of hydroxyl to isocyanates being 1:1-2. The reaction lasts for one to five hours under 80 to 120 DEG C and a prepolymer is obtained. While beating up, the temperature is heated up to 90 to 120 DEG C, 1, 4-Butanediol is added to the prepolymer under fast mixing for one or three minutes, and poured into warm-up flat mould coated with demolding agent and become hard set, 1-10MPa is added for solidification and demolding, and then polyurethane can be obtained from sulfuration under 110-140 DEG C for 18 to 24 hours. The polyurethane elastomer of the present invention has the advantages of good anti-corrosion, abrasion resistance and good mechanical performance.

Preparation method of colloidal sol for yttrium aluminate fibre

A preparation method of collosol for preparing yttrium aluminate fibre is characterized by adopting sheet aluminium, inorganic aluminium salt and yttrium nitrate as raw materials, using water as solvent, and in the presence of organic acid, utilizing the processes of hydrolysis and polymerization to obtain the invented product. Its composition mole ratio is as follows: yttrium: (metal aluminium +aluminium in aluminium salt)=3:5, water/(cetal aluminium + aluminium in aluminium salt + yttrium)=15-45, acid/(metal aluminium +aluminium in aluminium salt + yttrium)=0.10-0.8, and metal aluminium/aluminium salt is 2-50. The invented raw materials are easily available, preparation process is simple, cost is low. The obtained collosol is stable and transparent, can be used for preparing high-performance yttrium aluminate fibre.

Method for preparing vegetable oil polyhydric alcohol by using natural reproducible source

The invention relates to a method of preparing vegetable oil polylol by using natural renewable resources. Epoxy soybean oil, a solvent, methanol, water and a catalyst are added performed autoclave, wherein, the proportion by weight of the epoxy soybean oil, the solvent, anhydrous methanol, water and the catalyst is 10:1 to 10:1 to 12:1 to 6:1 to 4, the reaction temperature ranges from 100 DEG C to 160 DEG C, and the optimized temperature ranges from 120 DEG C to 160 DEG C. The reaction pressure is self pressure, and the reaction is completed after reacting for 12 to 20 hours through stirring. The method has the advantages of no pollution, simple processing procedure after the reaction, and mild reaction conditions.

Process for preparing Al2O3-SiO2 compound fibre

A process for preparing Al2O3-SiO2 compound fibre features that under the existance of organic solvent, the ethyl n-silicate is hydrolyzed by using aluminium sol with polymer structure as acidic catalyst source and water source to obtain spinning liquor whose main component is compound Si-Al solution. Said spinning liquor features high stability, transparency and flowability, simple preparing process, easy operation and high mechanical and high temp performance of Al2O3-SiO2 compound fibre.

Method for preparing aliphatic oligo carbonate polyol

Preparation process of polyurethane-based friction disk

Production process of phenyl carbamide and/or diphenyl carbamide

Under mild reaction condition, inside high pressure reactor and under controlled system pressure, reaction temperature and reaction time, cheap aniline hydrochlorate is made to react with carbamide in water solution to prepare phenyl carbamide and/or diphenyl carbamide selectively. Compared with similar preparation process, the present invention has shorter reaction time, high phenyl carbamide and/or diphenyl carbamide selectivity and high yield, high product purity needing no decoloring processing, and simple technological process.

Heterogeneous synthesis method for 4,4'-tetramethyldiaminodiphenylmethane

The invention provides a method for the heterogeneous phase synthesis of 4,4'-tetramethyl diaminodiphenylmethane, wherein diphenyl methane diamine, methyl carbonate and catalysts are put in a reactor, and added methyl carbonate is more than diphenyl methane diamine in addition quantity, and the air in the reactor is replaced by adding nitrogen, and the reaction temperature is between 160 and 200 DEG C, and the mixture undergoes the autoginous pressure and is reacted for 4 to 8 hours while stirring, and after the reaction the catalysts are filtered off, and excessive methyl carbonate is removed by steaming, and the solid obtained is recrystalized, so that the target products(4,4'-tetramethyl diaminodiphenylmethane) with high purity are obtained. The method has the advantages of no pollution, low cost, high purity and easy preparation.

一种氧化铝-氧化锆纤维的制备方法

... 一种氧化铝―氧化锆纤维的制备方法，以水溶性无机铝盐、水溶性无机锆盐以及金属铝为主要原料，以蒸馏水为溶剂，在回流条件下通过水解、聚合制得均匀透明的溶胶，在此溶胶中加入适宜的水溶性高分子作为助纺剂，经浓缩后制得具有适宜流变性能的纺丝原液，该纺丝原液经喷吹法纺制成前驱体纤维，前驱体纤维再经进一步热处理使氧化铝、氧化锆前驱体转化为氧化铝和氧化锆，从而得到本发明的氧化铝―氧化锆纤维。本发明工艺简单，制得的氧化铝―氧化锆纤维性能均匀稳定。 ...

Process for preparing spinning liquid as precursor of Al2O3-SiO2 compound fibre

Catalyst for catalytic purifying car exhaust and preparing process thereof

Catalyst for organic carboxylic acid ester synthesis, preparation and use thereof

The invention relates to a catalyst used for organic carbonate synthesis, a preparation method and the application thereof to the synthesis of organic carbonate by the reaction of compounds containing hydroxyl and carbamide. The catalyst is calcination matter of hydrated salt containing rare earth element at proper calcination temperature.

Method for preparing heat resistant polyurethane elastomer

一种由苯脲和甲醇合成苯氨基甲酸甲酯的方法

The invention is a method to synthesize methyl pheneyl carbamate by phenyl-urea and methanol, adding phenyl-urea, solvent, methanol and catalyst to reactor, displacing the reactor by inert gas, sealing the reacting kettle, raising the temperature to 145-170 deg.C at a speed of 4-10 deg.C/min during stirring, and reacting at this temperature and self-generating pressure for 3-5 hours. Its reaction condition is mediate, its operation course is simple, its reaction selectivity is good, and it is a method meeting the demands of industrialization and having extremely practicality.

Method for synthesizing polymer of terminal hydroxy ethylene liquid

A process for synthesizing hydroxy-terminated vinyl polymer liquid includes such steps as proportionally adding liquid hydroxy-terminal polyether, maleic acid anhydride and catalyst to high-pressure reactor, vacuumizing, filling N2, heating to 50-200 deg.c, adding epoxy compound, and polymerizing for 2-50 hr. Its advantage is high transform rate (100%).

Synthesis of anilino formate from aniline and carbamate

The present invention is the synthesis of anilino formate from aniline and carbonate. Anilino formate is synthesized through the reaction between aniline and carbamate in proper solvent for certain time in proper reaction temperature by adding certain amount of catalyst. The present invention has mild reaction condition, simple operation, easy-to-obtain catalyst, high reaction selectivity and high conversion rate and has high industrial practicability.

Process for preparing crystalline selenium ferrum compound Fe(HseO3)(Se2O5)

The present invention is the preparation process of crystallized Se-Fe composite Fe(HSeO3)(Se2O3). Under relatively low reaction temperature, Fe(OH)3 sol and solid H2SeO3 are reacted in short time to obtain suspending liquid, and after evaporating water and H2 reduction, Fe(HSeO3)(Se2O3) is prepared. Compared with similar synthesis processes, the said process has the advantages of mild reactioncondition and simple operation process.

Catalyst for synthesizing carbanilate and its usage

THe catalyst for synthesizing carbanilate consists of PdO and HZSM-5 molecular sieve in the weight ratio of 0.1-1 to 100. When monobasic alcohol and phenyl urea in the molar ratio of 5-100 and the said catalyst accounting for 1-20 % of total reactant weight are added into the reactor and under the magnetic stirring and temperature 100-200 deg.c, carbanilate is prepared through reaction of 1-24 hr. The catalyst results in simple preparation process, low reaction system pressure, high safety, easy-to-separate reaction product, repeatable use of catalyst and low production cost.

Double metal cyanide catalyst and its prepn. method

The present invention relates to the prepn. method of bimetallic cyanide catalyst, which is composed of Zn3[Co(CN)6]2.aZnCl2.bH2O.cL.dL', in which L is an organic alcohol, L' is an organic ether. Said invention uses successively alcohol (ether), ether (alcohol) to treat a mixture of zinc salt and hexacyanocobaltate to obtain precipitate which is then washed, vacuum dried to obtain the catalyst, which is easy to separate out from polyetherpolyol, low in application conc., simple in prepn. method and can synthesize low unsaturated polyetherpolyol under wide temp. range.

Heterogeneous synthesis method for 4,4'-tetramethyldiaminodiphenylmethane

The invention provides a method for the heterogeneous phase synthesis of 4,4'-tetramethyl diaminodiphenylmethane, wherein diphenyl methane diamine, methyl carbonate and catalysts are put in a reactor, and added methyl carbonate is more than diphenyl methane diamine in addition quantity, and the air in the reactor is replaced by adding nitrogen, and the reaction temperature is between 160 and 200 DEG C, and the mixture undergoes the autoginous pressure and is reacted for 4 to 8 hours while stirring, and after the reaction the catalysts are filtered off, and excessive methyl carbonate is removed by steaming, and the solid obtained is recrystalized, so that the target products(4,4'-tetramethyl diaminodiphenylmethane) with high purity are obtained. The method has the advantages of no pollution, low cost, high purity and easy preparation.

Preparation of polyurethane elastic body for multiplying wheel

Catalyst for catalytic cleaning of car tail gas and its preparing process

A catalyst for the catalytic cleaning of car's tail gas contains cellular ceramics, gamma-Al2O3, CeO2 and Pb in ratio of (16-18.35):(1.65-4):(0.0025-1):(0.02-0.2), and is prepared through immersing the cellular ceramics in Al2O3 sol containing disperser and adhesive for coating Al2O3, and adding CeO2 and Pd. Its advantages include low-temp ignition nature, high activity and simple preparing process.

Method for synthesizing anilino-menthyl-formate from phenylurea and methanol

Process for preparing ionized polyester polyol

A process for preparing the ionized polyester polyol includes proportionally feeding low-molecular polyester polyol, organic sulfonate of ester, catalyst and assistant in a reactor, slow raising tempto 100-300 deg.C, vacuumizing and polymerizing for 2-50 hr. Its advantages are simple process, high conversion and low cost.

一种用于合成苯胺基甲酸酯的催化剂及使用方法

... 一种用于合成苯胺基甲酸酯的催化剂的重量比组成为：PdO/HZSM-5分子筛＝0.1～1∶100，将一元醇和苯脲按摩尔比为一元醇∶苯脲＝5∶1～100∶1及占反应物总重量1％～20％的PdO/HZSM-5催化剂加入反应釜中，在磁力搅拌下，升温至100℃～200℃反应1～24小时，制得苯胺基甲酸酯。本发明具有制备过程简单，反应体系压力低，安全性好，反应物易于分离，催化剂可重复使用，生产成本低的优点。 ...

Method for generating nonisocyanate polyurethane using natural reproducible resource

This invention relates to a method for producing non-isocyanate polyurethane using renewable natural resources, comprising: add epoxy soybean oil and catalyst into the reactor, wherein the amount of catalyst added is 3-5mol% of epoxy soybean oil, and then aerate in carbon dioxide gas, with reaction temperature 100-140Deg C, and reaction pressure 6-14 atmospheric pressure, start the reaction with magnetic stirring . for 25-40h. The produced cyclic carbonates are mixed with amine at 70-80Deg C, perform flaking at 100-110Deg C for 7-8h, perform sulfidization at 90-110Deg C for 24-72h, and are placed at room temperature for 7-9d. This invention synthesizes non-isocyanate polyurethane by replacing petrochemical products with epoxy soybean oil and CO2 via two-step reactions, forming a green, clean, high efficient and simple line for producing non-isocyanate polyurethane.

Polyurethane-base soft ceramic composite material and producing process thereof

Process for synthesis of polymer polyhydric alcohol

Method for synthesizing five ring carbonate using natural reproducible resource

Simple preparation process of bimetallic cyanide catalyst

一种多晶铝酸钇纤维的制备方法

... 本发明公开了一种多晶铝酸钇纤维的制备方法，采用无机钇盐和铝为基本原料，以水作溶剂，在一定量有机酸的催化下，制得均匀稳定的铝钇溶胶，然后将已加入适当高分子助纺剂的胶体浓缩成具有一定流变性能的纺丝原液，最后经喷吹法得到凝胶纤维。凝胶纤维经低温干燥、中温水、热处理和高温焙烧，最终制得多晶铝酸钇纤维。该方法原料价廉易得，纺丝液配制及纤维喷吹工艺简单，制得的纤维无渣球，直径均匀且柔软亮泽。 ...

Process for purifying carbamic acid ester

The invention discloses a purifying method of carbamidate, which comprises the following steps: adding solvent into crude product of carbamate to prepare organic carbonate amine; setting the weight rate of crude product of carbamate and solvent at 1: 10-30; heating to the boiling point; refluxing 10-60min; continuing to reflux for 10-15 min after the carbamate is dissolved; filtering under heat; cooling the filtrate to indoor temperature; filtering to place the filter pie to dry at 90-120 deg. c for 3-12h; doing second recrystallization of crude product of carbamate with the same above steps. The invention has mild condition, simple operation course and cheap cost of solvent, which improves the recrystallizing purity with good economics for raw materials.

Composite catalyst for tripolymerization of isocyanic ester

The catalyst consists of trivinyl diamine and polymethylamino methylphenol in the weight ratio of 1 to 0.5-2. It is easy to prepare and has high transforming rate and high selectivity and it is suitable for the tripolymerization of all aliphatic and aromatic isocyanic esters.

Method for preparing polyols of acyclic oligo carbonic ester

Method for preparing polyurethane elastic body for multiplying wheel

The present invention relates to a preparation method of polyurethane elastomer which can be used as material for making speed-increasing gear. Said preparation method is characterized by that it uses common polyurethane raw material MDI as base material, changes molecular weight distribution of chain segment, rigid chain segment content and crosslinking density to make the structures of configuration and conformation of molecular chain and state of aggregation of polyurethane produce microphase separation so as to raise its heat resisting property and mechanical property, and make its product possess high heat stability and high chemical resistance. Said invented preparation method is simple and easy to implement.

Process for preparing flexible polyurethane foam plastic

Soft foamed polyurethane plastic is produced through a one-step reaction process with isocyanate component and low-unsaturation degree polyether polyol component in the presence of water as active foaming agent, catalyst(s), foam-stabilizing surfactant, optional foaming agent, coloring agent, stuffing, fire retardant and other conventional additives and assistants. It has high tensile strength, great elongation, very high tearing strength, improved machine performance and low cost.

Process for preparing spinning liquid as precursor of Al2O3-SiO2 compound fibre

A process for preparing spinning liquid as the precursor of Al2O3-SiO2 compound fibre features that under the existance of alcohol and the action of glacial acetic acid as catalyst, the ethyl n-silicate and aluminium sol with polymer structure take part in hydrolytic polymerization reaction to obtain the spinning liquid characterized mainly by compound Si-Al sol. Said spinning liquid features high stability, transparency and flowability, simple preparing process, long storage period and high physical properties of the compound fibre.

一种软质聚氨酯泡沫塑料的制备方法

... 一种软质聚氨酯泡沫塑料的制备方法，在作为活性发泡剂的水作用下，进一步地在一或多种催化剂、稳定泡沫的表面活性剂和可选的发泡剂、着色剂、填料、阻燃剂等常规添加剂及助剂存在下，通过异氰酸酯组份与低不饱和度聚醚多元醇组份一步法反应制备。本发明具有提高了抗张强度，伸长率，特别是撕裂强度大幅度提高，改善了加工性能，成本低廉等优点。 ...

Method for preparing silicon modified yttrium-aluminium garnet fibre

The preparation method of silicon modified polycrystalline yttrium aluminate fibre includes the following steps: it adopts inorganic yttrium salt and aluminium as basic raw material and uses water assolvent, under the catalytic action of a certain gquantity of organic acid the uniform and stable yttrium oxygen aluminium sol is made, then the alcohol solution of organic silicon can be added into the sol, and the proper high-molecualr spinning adjuvant is added to concentrated to obtian a spinning fluid with a certain rheological behaviour, finally, a blowing process is used to obtain gel fibre, said gel fibre is undergone the processes of low-temp. drying, medium-temp. water heat treatment and high-temp. roasitng so as to obtain the invented polycrystalline yttrium aluminate fibre.

Process for preparing crystalline selenium ferrum compound Fe (HseO3) (Se205)

Process for preparing nano SiO2 modified carbon fiber emulsion pasting agent

Process for preparing aluminium oxide-zirconium oxide fibres

A process for preparing aluminium oxide-zirconium oxide fibre from water-soluble inorganic aluminium and zirconium salts, metallic aluminium as main raw materials and distilled water as solvent includes such steps as hydrolysis, polymerizing to obtain transparent sol, adding proper water-soluble high-molecular substance as spinning aid, concentrating, then jet spinning to obtain precursor fibre, and heat treating to make conversion of precursor to aluminium oxide-zirconium oxide fibre. Its advantages are simple process and high uniformity and stability.

端羟基乙烯基液体聚合物的合成方法

... 一种端羟基乙烯基液体聚合物的合成方法，将含有n个活泼氢原子的端羟基液体聚醚，顺丁烯二酸酐及催化剂按比例置入高压釜中，反复抽真空并充以氮气，升温到50～200℃时加入环氧化物，聚合2～50小时，其中：环氧化物与顺丁烯二酸酐的摩尔比为：环氧化物∶顺丁烯二酸酐＝1.1～20∶1，含有几个活泼氢原子的端羟基液体聚醚与顺丁烯二酸酐的摩尔比为端羟基液体聚醚∶顺丁烯二酸酐＝1∶0.5n～5n；催化剂用量占端羟基液体聚醚、环氧化物与顺丁烯∶酚酐重量之和的0.01～0.03％。本发明具有工艺简便，转化率为100％，重复性好，成本低等优点。 ...

Al2O3-SiO2 compound fibre and prepn. thereof

一种聚醚酯多元醇的制备方法

... 一种聚醚酯多元醇的制备方法，是将含有n个活泼氢原子的小分子聚醚、环状酸酐和催化剂按一定比例置入高压釜中，反复抽真空并充以氮气，升温到50～200℃时加入环氧化物，聚合2～50小时；其中：环氧化物与环状酸酐的摩尔比为环氧化物∶环状酸酐＝1.1～20∶1，含有几个活泼氢原子的小分子聚醚与顺丁烯二酸酐的摩尔比为：小分子聚醚∶顺丁烯二酸酐＝1∶0.5n～5n；催化剂用量占小分子聚醚、环氧化物与环状酸酐重量之和的0.01-0.03％。本发明具有工艺简便，转化率高，重复性好，成本低等优点。 ...

Composite catalyst of bimetal cyanide and its preparing process and application

Catalyst for catalytic cleaning of car tail gas and its preparing process

一种纳米膨润土水基聚氨酯复合材料的制备方法

The invention is a nano bentonite water-based polyurethane composite preparing method, making sulfonic acid sodium ion grafted polyester glycol, diurethanes, catalyst, dimethylol propionic acid and acetone react in a certain proportion under the protection of nitrogen gas, then adding in triethylamine acetone solution to react for 15 minutes, and at last adding in nano bentonite deionized water dispersing liquor and reducing the pressure to vaporize the acetone; the obtained water-based polyurethane has excellent performance and retains the excellent performances of weatherability, heat resistance and bacteriostatic property of nano bentonite.

一种聚氨酯多孔薄膜及其制备方法

The porous polyurethane film has thickness of 80-120 micron, tensile strength of 10-20 MPa, elongation at breaking of 100-350 %, pore size in the outer surface contacting with solidifying agent of 5-20 micron, pore size in the inner surface contacting with mold of 30-80 micron, humidity transmission rate of 900-1800 g/m in 2.24 hr, water absorption of 30-300 wt% and porosity of 40-100 %. Its preparation process includes two-step solution polymerization to synthesize polyurethane solution, adding proper solvent, core creating agent, etc. into the solution, diluting the solution into film forming liquid in certain concentration, and wet coating to form the film. The present invention has the advantages of simple technological process, low cost, compact outer surface of the film and loose and porous inner surface.

Composite catalyst for tripolymerization of isocyanate

Production of fatty oligo-ester carbonate polyhydric alcohol

Composite catalyst bimetal cyanide and its preparing process and application

An improved bimetal cyanide (DMC) catalyst contains a DMC compound, an organic complexant and the sulfate with mole ratio to DMA of 0.5-5.0, and features simple preparing process, high yield and low cost. When it is used to pressure polyether polyol, it can shorten the induction period and has high activity, resulting in no need of refining step no pollution, short period and less consumption of energy and raw materials.

PROCESS FOR THE PREPARATION OF POLYETHERESTER POLYOLS

Disclosed is a process for the preparation of polyetherester polyols prepared with hybrid catalysts, the polyether esters obtained from the process and the use of such materials in polyurethane applications. The hybrid catalysts used in this invention comprise double metal cyanide complex catalysts (DMC) and at least one co-catalyst. 2. The process according to claim 1 , wherein X is C═O.5. The process according to claim 1 , wherein X is CR1R2.6. The process according to claim 5 , wherein R1 and R2 are each hydrogen claim 5 , and Y is —(CR3R4)m- claim 5 ,wherein m is 3 or 5, andR3 and R4 are each hydrogen.7. (canceled)8. The process according to claim 1 , wherein the co-catalyst is a compound catalyzing an esterification reaction claim 1 , a compound catalyzing a transesterification reaction claim 1 , or both.9. (canceled)10. The process according to claim 1 , wherein the co-catalyst is a titanium alkoxide.11. The process according to claim 1 , wherein the double metal cyanide complex catalyst is present in an amount of from 5 to 2000 ppm claim 1 , and the co-catalyst is present in an amount of from 1 to 1000 ppm claim 1 , each with respect to a total mass of the polyetherester polyol.1215-. (canceled)16. The process according to claim 1 , wherein the double metal cyanide complex catalyst comprises at least one selected from the group consisting of Co—Zn claim 1 , Fe—Zn claim 1 , and Ni—Zn.17. The process according to claim 16 , wherein the double metal cyanide complex catalyst comprises Co—Zn having formula Zn[Co(CN)].18. The process according to claim 11 , wherein the double metal cyanide complex catalyst is present in an amount of from 20 to 250 ppm claim 11 , and the co-catalyst is present in an amount of from 1 to 100 ppm.19. The process according to claim 11 , wherein the double metal cyanide complex catalyst is present in an amount of from 50 to 150 ppm claim 11 , and the co-catalyst is present in an amount of from 1 to 60 ppm.20. The process according to ...

CATALYST FOR PRODUCING N-SUBSTITUTED CARBAMATES, AND THE PREPARATION AND APPLICATION OF THE SAME

The present invention relates to a novel catalyst for producing N-substituted carbamates, the preparation of the catalyst and an improved method for producing N-substituted carbamates from these novel catalysts. The active component of the catalyst is a heteropoly acid and the catalyst support comprises a metal oxide or a metalloid oxide. The catalyst can be used to promote the reaction of carbamate and amine, thereby generating N-substituted carbamates with high yield. In the presence of the catalyst, the reaction conditions are relatively mild, the catalytic activity and selectivity of the reaction are high, and the reaction time is relatively short. Furthermore, the catalyst can be conveniently separated from the reaction system and recycled, therefore, the catalyst can be used to facilitate the further scale-up test and commercial application. 112-. (canceled)13. A catalyst for preparing a N-substituted carbamate , wherein the active component of the catalyst comprises a heteropoly acid and the component of the catalyst support comprise a metal oxide or metalloid oxide.14. The catalyst of claim 13 , wherein the heteropoly acid is a Keggin type heteropoly acid.15. The catalyst of claim 14 , wherein the heteropoly acid is selected from the group consisting of HPWO.nHO claim 14 , HPMoO.nHO claim 14 , HSiWO.nHO and HSiMoO.nHO.16. The catalyst of claim 13 , wherein the catalyst support component comprising a metal oxide or a metalloid oxide is selected from the group consisting of zirconium oxide claim 13 , titanium oxide claim 13 , zinc oxide claim 13 , silicon oxide claim 13 , magnesium oxide claim 13 , calcium oxide claim 13 , tin oxide claim 13 , barium oxide claim 13 , cerium oxide claim 13 , lanthanum oxide claim 13 , vanadium pentoxide claim 13 , aluminium oxide and mixtures thereof.17. The catalyst of claim 16 , wherein the metal oxide is selected from the group consisting of a vanadium pentoxide claim 16 , an aluminium oxide and mixtures thereof.18. The ...

Process for the preparation of polyetherester polyols

Disclosed is a process for the preparation of polyetherester polyols prepared with hybrid catalysts, the polyetheresters obtained from the process and the use of such materials in polyurethane applications. The hybrid catalysts used in this invention comprise double metal cyanide complex catalysts (DMC) and at least one co-catalyst.

Catalyst for the synthesis of organic carbonates, process for preparing the same and application thereof

The present invention relates to a catalyst for the synthesis of organic carbonates, the preparation of the catalyst and the application of this catalyst in the synthesis of organic carbonates from reacting urea and hydroxyl group containing compounds. The catalyst provided in this invention is a calcinate of hydrous salt containing rare earth element at a moderate calcining temperature.

Catalyst for producing n-substituted carbamates, and the preparation and application of the same

The present invention relates to a novel catalyst for producing N-substituted carbamates, the preparation of the catalyst and an improved method for producing N-substituted carbamates from these novel catalysts. The active component of the catalyst is a heteropoly acid and the catalyst support comprises a metal oxide or a metalloid oxide. The catalyst can be used to promote the reaction of carbamate and amine, thereby generating N-substituted carbamates with high yield. In the presence of the catalyst, the reaction conditions are relatively mild, the catalytic activity and selectivity of the reaction are high, and the reaction time is relatively short. Furthermore, the catalyst can be conveniently separated from the reaction system and recycled. therefore, the catalyst can be used to facilitate the further scale-up test and commercial application.