110results about How to "No need for separation and purification" patented technology

The invention discloses a hydroxylated tung oil and an ester group-aminated preparation method, belonging to the technical field of organic chemosynthesis. In the method, under a certain condition, ester groups in the tung oil and diethanol amine are subjected to aminolysis reaction on the premise of reserving conjugated double bonds, thus the tung oil is hydroxylated to mainly produce a compound containing terminated hydroxyl and three conjugated double bonds. The structural formula of the compound is shown in the specification. The aminolysis reaction product plays an important role in developing and producing processes of leading the tung oil into waterborne polyurethane, not only can combine the advantages of the tung oil and the polyurethane, but also can improve the utilization ratio of tung oil resources as special local products in China and decrease the dependence on petroleum products; and simultaneously, the method has the advantages of simplicity, practicability, high conversion rate and convenience in industrialized production.

The invention discloses a compound semiconductor photocatalyst, a preparation method of the compound semiconductor photocatalyst, a photocatalytic system comprising the compound semiconductor photocatalyst, and a hydrogen preparation method. According to the invention, quantum dots are adsorbed on the surface of TiO2 as a carrier by mercaptopropionic acid on surfaces of the quantum dots; a Co, Ni or Fe salt or its complex is assembled to the surfaces of the quantum dots in a photic driving in-situ growth way in the presence of biomass derivatives so that the compound semiconductor photocatalyst is obtained; and simultaneously, the biomass derivatives are reformed and hydrogen is produced. The preparation method of the compound semiconductor photocatalyst fast and simply realizes TiO2 sensitization by CdTe, CdSe or CdS, and realizes preparation of the compound semiconductor photocatalyst having high efficiency under visible light driving. The hydrogen preparation method realizes biomass derivative reforming and hydrogen preparation. The preparation method of the compound semiconductor photocatalyst does not need a template or an initiator. The compound semiconductor photocatalyst is efficient, stable and cheap and does not need further separation purification. According to the invention, harsh conditions such as calcining are not needed and precious metals such as Pt and Rh as cocatalysts are not adopted; reactions are efficient; operation is simple; and a cost is low and practicability is obtained.

The invention relates to a low-toxicity mannich base compound for preparing an acidizing corrosion inhibitor. A molecular formula of the compound is shown in the specification. The invention also relates to a mannich acidizing corrosion inhibitor prepared by using the mannich base compound, and further relates to a mannich synergistic acidification corrosion inhibitor formed by the mannich acidizing corrosion inhibitor and a halide ion synergist in a compounding manner. In addition, the invention relates to a preparation method of the mannich acidizing corrosion inhibitor. A formula of the mannich acidizing corrosion inhibitor is prepared from a main mannich acidizing corrosion inhibitor, an organic solvent, a surfactant, a corrosion additive and a solvent in the compounding manner. The invention further relates to a method for preparing the mannich synergistic acidification corrosion inhibitor by using the method. By adopting the mannich base compound, the acidizing corrosion inhibitor and the preparation method thereof, the problems that the corrosion inhibitor product in the prior art is serious in pollution, high in cost, and unstable in performance are solved.

The invention relates to a method for preparing functional grease rich in phytosterol ester and diglyceride. The method is characterized by comprising the following steps of: (1) adding reaction raw materials: adding phytosterol, triglyceride, a reaction solvent and molecular sieves into a reaction kettle in a manner that the mole ratio of the phytosterol to the triglyceride is 1: 2 to 1: 6, the proportioning ratio of the phytosterol to the reaction solvent is 100-200mmol: 1L, and the added amount of the molecular sieves is 50 g / L, thereby obtaining a premix; (2) carrying out non-aqueous enzymatic transesterification reaction: adding 5-20 g / L of lipase into the premix, adding 100-200ppm of antioxidant, and carrying out stirring reaction for 8-12 h at the temperature of 50-65 DEG C and normal pressure; and (3) carrying out after-treatment on a product: after the reaction is completed, carrying out centrifugation so as to remove the lipase and the molecular sieves, and carrying out rotary evaporation under reduced pressure so as to remove the reaction solvent, thereby obtaining the functional grease rich in phytosterol ester and diglyceride. The method has the advantages that the functional grease rich in two nutritional active ingredients can be obtained through one-step reaction, the product does not need separation and purification, and the operation is simple and convenient.

The invention relates to a method for producing functional grease containing rich phytosterin ester from high-acid-value vegetable oil. The method is characterized by comprising the following steps: (1) addition of reaction raw materials: adding phytosterin, high-acid-value grease and molecular sieve into a reaction kettle, adding 100-200ppm of antioxidant, heating to 45-60 DEG C, stirring and carrying out ultrasonic treatment to obtain a premixture, wherein the mole ratio of the phytosterin to free fatty acids in the high-acid-value grease is 1:1-5:1; (2) enzymatic ester exchange reaction: adding 5-40 g / L lipase into the premixture, and stirring to react at 45-60 DEG C under normal pressure for 6-12 hours; and (3) carrying out after-treatment on the product to obtain the functional grease containing rich phytosterin ester. The method can obviously lower the acid value of the high-acid-value vegetable oil and generate the new functional active component phytosterin ester, and the product is simple for separation and purification; and thus, the method can easily implement large-scale amplification.

The invention belongs to the technical field of enzyme engineering and particularly relates to a method for obtaining sucrose isomerase through site-directed mutation so as to improve the product specificity of the sucrose isomerase, and a method for preparing immobilized sucrose isomerase and achieving separation of the immobilized enzyme through a non-aqueous phase catalytic system. The content of isomaltulose in a catalytic product of the sucrose isomerase is substantially increased and increased to 99.16% from 90.28%, and the enzyme preparation process is easy to implement and is high in enzyme producing efficiency; due to the sucrose isomerase immobilization technology, the sucrose isomerase can easily keep high catalytic activity and low enzyme amount loss in the repeated catalysis process, multi-batch continuous use can be performed, operating difficulty can be greatly reduced, and economic cost is saved.

The invention relates to the field of the synthesis of vitamin C derivatives, and in particular relates to a synthesizing method of vitamin C ethyl ether. The method comprises the following steps of: reacting vitamin C as an initiative raw material and dimethoxy propane as a reactant, thereby generating (R)-3,4-dyhydroxyl-5- [(S)-2,2-dimethyl-1,3-dioxolane-4-yl] furan-2(5H)-ketone; next, adding alkali and an alkylation reagent, thereby generating (R)-4-ethyoxyl-3-hydroxyl-5-[(S)-2,2-dimethyl-1,3-dioxolane-4-yl] furan-2(5H)-ketone; and removing a protecting group, thereby generating the vitamin C ethyl ether. According to the method, the reactions in the three steps can be finished in the same kettle, so that the industrialized operation is simplified greatly; and a large number of organic waste liquids cannot be generated. As a result, the total yield in the three steps is improved to 50%-53.4%.

The invention provides an oilfield water injection corrosion inhibitor, the components comprising: 30-80% Mannich base quaternized ammonium derivatives, 10-60% solvent, 0-10% acetylenic alcohol, 0-10% by weight percentage 10% alkali metal iodide, 0-5% OP-10, 0-20% urotropine; and further provides a preparation method of the above oilfield water injection corrosion inhibitor. The invention has simple process, selects low-toxicity and easy-to-obtain synthetic raw materials, and is easy to realize industrialized production. The raw materials used in the invention have corrosion inhibition performance, and the corrosion inhibition effect is obvious after being further prepared as a corrosion inhibitor, without separation and purification, easy to use, and a small dosage has a good corrosion inhibition effect. Adding 100mg / L of the corrosion inhibitor of the present invention in the oil field water injection system can significantly reduce the corrosion rate of N80 steel, and adding 30mg / L of the corrosion inhibitor of the present invention can meet the oil and gas industry standard SY / T 5329-2012 " The recommended standard (<0.076mm / a) in "Recommended Indicators and Analysis Methods for Injection Water Quality in Clastic Reservoirs".

The invention discloses tung oil polyol based anionic polyurethane with post-crosslinking capacity and a preparation method of anionic polyurethane and belongs to the technical field of polymer synthesis. According to the method, tung oil polyols or hydroxylated tung oil containing conjugated double bonds, dimethylolpropionic acid, PTMG, ethylenediamine, HMDI or isophorone diisocyanate and the like are taken as raw materials, the hydroxylated tung oil is introduced into a polyurethane soft-segment structure by controlling a feeding sequence, and a anionic polyurethane dispersion containing hydrophilic inner salt groups and the conjugated double bonds is prepared through triethylamine neutralization. A formed film after partial crosslinking of the double bonds has excellent water resistance and solvent resistance, compared with common anionic waterborne polyurethane containing no conjugated double bonds, waterborne polyurethane has better water resistance, alcohol resistance, tensile strength, modulus and thermal stability, and the mechanical properties of anionic polyurethane are improved along with increase of the hydroxylated tung oil content and the crosslinking density and can be regulated by changing the crosslinking degree.

The invention discloses a second component prepared on the basis of polyurethane degradation products for polyurethane plastic runways and application of the second component to preparing the plastic runways. The polyurethane degradation products are degradation products directly obtained by means of alcoholysis of scrap or waste of polyurethane elastomer products, polyether polyol can be replaced by the polyurethane degradation products, and the second component for the polyurethane plastic runways can be prepared from the polyurethane degradation products and substances such as vulcanizing agents and can be used for preparing the polyurethane plastic runways. The second component and the application have the advantages that a raw material, namely the waste of polyurethane elastomers, is easily available, the second component and the application are favorable for solving environmental protection problems due to industrial polyurethane waste, production processes are simple relatively, and the second component has a high economical benefit; the polyurethane plastic runways prepared by the aid of the second component for the polyurethane plastic runways are high in hardness, tensile strength and elongation at break, and accordingly the second component has extremely high popularization value.

The invention discloses recombinant escherichia coli for a cell surface display PET lytic enzyme, a construction and an application. A construction method thereof comprises the following steps: (1) chemically compounding ankyrin and PETase gene; (2) utilizing PCR to connect the ankyrin with the PETase gene, thereby acquiring a fused sequence; (3) connecting the fused sequence with an escherichia coli expression vector, thereby acquiring a fused expression vector; and (4) transferring the fused expression vector into expression host escherichia coli, thereby acquiring the recombinant escherichia coli for the cell surface display PET lytic enzyme. According to the construction method provided by the invention, the PETase with the objective protein having a PET degrading function is positioned to the cell surface through inaK-N, BrkA, AIDA or Lpp-OmpA ankyrin and has the characteristic of high catalytic activity, so that the problems of limited capacity of generating PETase, long growth period and low degradation rate of the wild bacterial strain can be solved; the enzyme does not need to be separated and purified; and the preparation and the use are simple.

The invention discloses a fluorescent probe synthesized by rhodamine B, triethylene tetramine and phenyl isothiocyanate and a preparing method and application thereof. Specifically, firstly, the rhodamine B reacts with the triethylene tetramine to form a spirocyclic amide structure which is stable in property, nitrogenous bridged segments are introduced in, and the rhodamine B reacts with the phenyl isothiocyanate, so that sulphur atoms are introduced in. By means of the thiophil property of mercury ions, each molecule in an obtained novel rhodamine B-phenylthiourea derivative RTTU can be combined with three mercury ions, and therefore high selectivity and detection sensitivity are achieved. Fluorescent probe molecules can conduct detection in a neutral buffer solution, especially an aqueous phase and can also detect the mercury ions from mercuric chloride, and higher practicability is achieved. In addition, the fluorescent probe molecules can be directly precipitated out in the preparing process, further separation and purification are not needed, and the synthesizing method is simple and convenient and easy to implement.

The invention discloses a nonionic / cationic composite asphalt emulsifier, OP-10 is reacted with epichlorohydrin to obtain a nonionic intermediate, the nonionic intermediate is reacted with alkylamine, and by chemical reaction, the nonionic surfactant is connected with the alkyl amine for synthesis and preparation of the nonionic / cationic composite asphalt emulsifier. The nonionic / cationic composite asphalt emulsifier is a slow cracking type asphalt emulsifier, and has good emulsifying properties and storage stability on different sources of asphalt and under different pH, and asphalt emulsion performance can reach technical requirements of emulsified asphalt used in roads in technical specification JTG F40-2004 for construction of highway asphalt pavements.

The invention relates to a method for preparing an antirust agent from waste oil, and belongs to the technical fields of novel compound preparation and antirust agent preparation technologies. According to the method, maleic waste oil acid alcohol amine is generated by being subjected to reaction between the waste oil and maleic anhydride to obtain maleic waste oil and then being subjected to reaction between the maleic waste oil and alcohol amine. The waste oil serving as a raw material in the method is recycled oil in swill of a restaurant; a new application field is developed to the application of the waste oil. The adopted reaction conditions are mild; the technology is convenient to operate; the production cost is low. The obtained maleic waste oil acid alcohol amine is extremely high in rust resistance and can be used as the antirust agent applied to products such as cutting liquid and antirust water.

The invention relates to an antigen used PCR pipe as adhering materials, dentate measuring device and the corresponding agent box. The method uses PCR pipe (polystyrene and so on), which has been operated by glutaral and so on (double function molecule) to adhere nucleotide dentate (or antigen, antibody and aglucon). It changes dentate signal into nucleotide aglucon signal by directly combining anomaly oligonucleotide aglucon (or anomaly oligonucleotide aglucon with signal molecule) with dentate, and then detests dentate by PCR (or rolling ring copy) amplifying and measuring.

The invention provides a basophilic granulocyte activation and degranulation identification method. The basophilic granulocyte activation and degranulation identification method comprises the following steps that test samples are numbered in sequence, and flow type sample feeding pipes required by testing are marked; a required anti-human CD123, anti-human CCR3, anti-human HLA-DR, anti-human CD203c and / or anti-human CD63 fluorescence labeling flow type antibody combination is added into each flow type sample feeding pipe; mixed whole blood is added into the marked flow type pipes, and shading incubation is conducted at the indoor temperature; red blood cell lysate is added into each sample pipe, and shading incubation is conducted at the indoor temperature again; supernatant is removed in a centrifugal mode after incubation; detection is conducted by means of a flow cytometry, and the number of basophilic granulocytes and the average fluorescence intensity are analyzed. According to the basophilic granulocyte activation and degranulation identification method, 80%-100% of the basophilic granulocytes in peripheral blood can be distinguished from other types of cells under the condition that the basophilic granulocytes do not need to be separated or purified, the basophilic granulocyte activation and / or degranulation state can be identified, whole blood of no more than 100 microlitres is needed by each sample to be tested, and the repeatability is good.

The invention relates to a method for preparing ethyl-demethy laminothiazolyloximate, which comprises the following steps: oximate is performed on acetylacetic ether by using nitrous acid ester in alcohol solvent, and then cyclization is performed between the solution and thiourea through bromination to prepare ethyl-demethy laminothiazolyloximate. The method mainly has the beneficial effects that both oximate and bromination intermediates need no separation and purification, and are used in the next reaction directly, so the operating steps are simplified, the route is advanced, the reaction condition is mild, the operating steps are simplified, the unit operation is avoided, the post-processing is simple, the manufacture cost is low, the yield is higher, the production of the three wastes is less, and more important implementary value and the social and economic benefits are realized.

The invention discloses tung oil polyhydric-alcohol-based nonionic polyurethane capable of being crosslinked later and a preparation thereof, and belongs to the technical field of polymer synthesis. A mixture (MDI-50) of conjugated double bond containing tung oil polyhydric alcohol (or called hydroxylated tung oil (HTO)) subjected to alcoholysis or aminolysis, polyethylene glycol (PEG) and 4,4'-benzhydryl diisocyanate / 2,4'-benzhydryl diisocyanate or 4,4'-hexamethylene diisocyanate (HMDI) and the like are adopted as raw materials, the reaction conditions are controlled to make the raw materials including reactive hydrogen react with isocyanate by controlling reaction conditions, viscosity is controlled, and nonionic polyurethane dispersion liquid (HTO-NPUD) which has hydrophilic units and oleophilic units at the same time, comprises a conjugated double bond structure, and can be stable in all pH values is generated. Compared with common polyether type nonionic polyurethane, nonionic polyurethane containing three tung oil conjugated double bonds can be stable in an acid-base medium, the surface tension is obviously reduced, HLB can be adjusted according to the content of a hard segment, and the tung oil polyhydric-alcohol-based nonionic polyurethane is expected to serve as a functional type nonionic polyurethane stabilizing agent, and is used for preparation of polyurethane alloy.

The invention belongs to the technical field of preparation of feed additives and particularly relates to a preparation method of calcium bis(2-hydroxy-4-(methylthio)butyrate). The preparation methodcomprises the following steps: a calcium compound is uniformly mixed with a dispersant under stirring, the mixture is mixed with bis(2-hydroxy-4-(methylthio)butyrate) for a reaction, a product is dried, and the final product calcium bis(2-hydroxy-4-(methylthio)butyrate) is obtained. The method adopts a few process steps, reaction conditions are mild, the reaction is fast, and the total productioncost is low; the yield of prepared calcium bis(2-hydroxy-4-(methylthio)butyrate) is as high as 96% or higher, the product is loose and good in dispersity, and the problems of low yield and purity of calcium bis(2-hydroxy-4-(methylthio)butyrate), sticky and greasy filter cake, difficult suction filtration, poor smoothness and the like in actual production process are solved; According to the preparation method of calcium bis(2-hydroxy-4-(methylthio)butyrate), the formula is scientific and reasonable, the cost is low, and the preparation process is simple, fast and convenient and has quite greateconomic significance and social significance in industrial preparation of calcium bis(2-hydroxy-4-(methylthio)butyrate).

The invention discloses modified-starch composite gel, and a preparation method and application thereof. The preparation method mainly includes 1), gelatinizing starch in water, adding zwitter-ion monomers and initiators into the obtained mixture, and stirring for 0.5-2 hours for reaction to obtain a zwitter-ion modified starch water solution, wherein the zwitter-ion monomers are compounds, the same structure unit of the zwitter-ion monomers comprises cation groups and anion groups, the molar ratio of the cation groups to the anion groups is 1:1, the cation groups are connected with the aniongroups through methylenes, and the number of methylenes is 0-3; 2), adding polyvinyl alcohol into the obtained water solution to allow reflux reaction for 2-4 hours, pouring a reactant into a mold, and performing freezing formation to obtain the modified-starch composite gel, wherein the starch, the zwitter-ion monomers, the initiators and the polyvinyl alcohol are in a ratio of 1:(0.1-1):(0.001-0.01):(2-10). The modified-starch composite gel has the advantages of high water-absorption swelling property and good heavy-metal-ion absorption capability in saline water.

The invention discloses a synthesis method of a pyrazolotriazine energetic compound. The method comprises the following steps: firstly, taking a pyrazole derivative as a raw material, obtaining an intermediate product 5-aminopyrazole derivative through a VNS ammoniation method, and then carrying out diazo coupling and cyclization on the 5-aminopyrazole derivative and nitroacetonitrile sodium saltto obtain the target compound pyrazolotriazine compound. The target compound can be obtained through two-step reaction, wherein the synthesis steps are shortened, the total reaction yield and safety in the reaction process are improved, and the prepared target compound is excellent in performance, high in mechanical and thermal sensitivity and good in detonation performance and is suitable for thefield of propellants and explosives.

The invention relates to a preparation method of a novel cation asphalt emulsifier, which takes nicotinic acid and glycol as initial raw materials, an esterification reaction is carried out to obtain symmetrical gemini nicotinate, benzyl chloride on chloromethylated polystyrene (PVBC) resin is taken as an active center, and is grafted and quaternized to obtain water-insoluble gemini nicotinate pyridinium bactericide, and the novel water-insoluble gemini nicotinate pyridinium asphalt emulsifier is prepared, and thereby an optimum synthesis technology is given. The synthesized emulsifier is the slow-cracking asphalt emulsifier. The method can be widely used for a bonding layer, a fog sealing layer and solvent-free cold stirring and used for recovery / utilization of asphalt and bituminous pavement base stabilization.

The invention belongs to the field of medicinal chemical engineering, and relates to a preparation method for (S)-(-)-alpha-methylaminopropiophenone. The invention also relates to a composition, application thereof and a method of preparing ephedrine or pseudoephedrine. Concretely, the invention discloses preparation and a resolution purification technology of alpha-methylaminopropiophenone. Propiophenone or bromopropiophenone is taken as a raw material and is subjected to continuous synthesis, and resolution and purification of optically-pure alpha-methylaminopropiophenone are directly performed without performing synthesis and separation of alpha-methylaminopropiophenone hydrochloride, and the final product is obtained in the form of a [(S)-(-)-alpha-methylaminopropiophenone]2.(2R,3R)-dibenzoyltartaric acid derivative. Compared with the prior art, the preparation method is relatively simple in operation, relatively low in cost and relatively high in reaction yield and resolution efficiency, and all solvents are recyclable.

The invention discloses a rigid polyurethane foam material on the basis of polyurethane insole degradation products and a method for preparing the rigid polyurethane foam material. Rigid polyurethane foam combined polyether is prepared from the degradation products instead of 15-25% polyether polyol, the degradation products are directly obtained by means of alcoholysis of polyurethane insoles, and the rigid polyurethane foam combined polyether and isocyanate black materials are mixed with one another to obtain the rigid polyurethane foam material. The rigid polyurethane foam material and the method have the advantages that a raw material, namely polyurethane insole waste, is easily available, accordingly, the rigid polyurethane foam material and the method are favorable for solving environmental protection problems due to the industrial polyurethane insole waste, production processes are relatively simple, and the rigid polyurethane foam material and the method have high economical benefits; the rigid polyurethane foam material prepared from the polyurethane insoles has a low heat conductivity coefficient, is suitable for preparing heat-insulation materials and has extremely high popularization value.

The invention provides application of a metal nanocluster catalyst in one-step preparation of acetal from alcohol. The method comprises the following steps: under a solvent-free condition, selecting a M (M = Cu, Au, Pt, Pd and Ag) metal nanocluster catalyst with accurate atomic number, smaller size (< 0.05) and high dispersity (M = 2nm) as a catalytic oxidation active center, loading the metal nanocluster on a carrier to serve as a catalyst, taking oxygen or air as an oxidizing agent, and oxidizing alcohol by a one-step method to prepare the acetal, wherein the mass ratio of the loaded metal element to the catalyst is 0.05-5.00%. The method is simple and convenient in reaction operation, high in catalyst conversion rate and good in selectivity, does not need to add organic solvents and acid-base additives, is environment-friendly, and has high practicability and economy.

The invention discloses a waterproof coating prepolymer prepared based on a polyurethane degradation product, and an application of the prepolymer in the preparation of a waterproof coating. The prepolymer is prepared through a reaction of polyol and isocyanate, and 25-50% of the polyol is replaced by the degradation product directly obtained after alcoholysis of polyurethane elastomer product scraps or wastes. The polyurethane elastomer waste raw material used in the invention is easy to obtain, so solving of the environmental protection problem of industrial polyurethane wastes is facilitated; a production method of the prepolymer is simple and has a high economic benefit; and the waterproof coating prepared from the prepolymer has the advantages of high tensile strength, large elongation at break, good hydrolysis resistance, and extremely high promotion values.

The invention discloses a preparation method of a lithium ion battery positive electrode composite material and a precursor thereof, and in particular relates to a novel method for preparing a high-purity low-cost binary or ternary precursor and preparing a high-performance lithium ion battery binary or ternary positive electrode composite material by utilizing the precursor, belonging to the technical field of new energy materials and the preparation thereof. The method comprises the following specific steps: (1) putting salt-type solid raw materials of two or three of nickel, cobalt and manganese with crystal water into a reactor, and heating the materials to the molten state; (2) introducing ammonia under the protection of inert gas, supplementing a small amount of water or no water according to the solubility of salts at different temperatures, stirring and reacting; (3) evaporating ammonium salt after full reaction, taking the solid out, and drying so as to get the amorphous binary or ternary positive electrode composite material precursor; and (4) mixing the precursor with lithium carbonate according to a certain ratio, and further preparing the lithium ion battery positive electrode composite material through a two-section sintering method. The precursor synthetic method is simple, sodium hydroxide is avoided from being used, separation and purification are not required, and the high-purity positive electrode composite material precursor which has no impurities basically can be obtained; furthermore, no industrial waste water is discharged, and the by-product ammonium salt can further generate economic benefit; and the positive electrode composite material prepared by the precursor has excellent performances, and is convenient for industrialization.

The invention discloses a method for purification of monochloroacetic acid by catalytic distillation. According to the method, trichloroacetic acid and dichloroacetic acid in a trichloroacetic acid, dichloroacetic acid, monochloroacetic acid and acetic acid mixture are converted into monochloroacetic acid by a fixed bed catalytic distillation column, the selectivity is over 98%, and the rest is the acetic acid. A catalyst is a noble metal catalyst supported on coal-based activated carbon. After preheating, the mixture and hydrogen enter the fixed bed catalytic distillation column from the middle and the bottom of the column respectively. Controllable dechlorination reaction takes place on the surface of the catalyst. Hydrogen chloride, by-product acetic acid and residual hydrogen are discharged from the top of the column, high-purity acetic acid can be obtained, and the monochloroacetic acid with higher boiling point is obtained from the bottom of the column. The purity of the monochloroacetic acid is over 99%.

The invention discloses a polythiophene / sulfonic acid aqueous polyurethane conductive material as well as a preparation method and application thereof. The preparation method of the polythiophene / sulfonic acid aqueous polyurethane conductive material comprises the following steps of: (1) performing a reaction on polytetrahydrofuran, the molecular weight of which is 15000-20000 and hexamethyne diisocyanate, dimethylolpropionic acid, hydroxylamine hydrochloride and amino sulfonate, and after reaction, adding water to emulsify to obtain a sulfonic acid / aqueous polyurethane emulsion; and (2) preparing the sulfonic acid / aqueous polyurethane emulsion into an aqueous solution, adding a monomer 3,4-ethylenedioxythiophene, wherein the monomer is polymerized in the aqueous solution, and after reaction, removing an inorganic salt to prepare the polythiophene / sulfonic acid aqueous polyurethane conductive material. The preparation method disclosed by the invention is simple, the raw materials are easily available, the cost is low, and the method has important industrial application value. The prepared polythiophene / sulfonic acid aqueous polyurethane conductive material is quite obvious in conductivity and good in conducting film-forming property, and can be used for preparing a PET surface antistatic coating.

The invention provides a high-performance aliphatic polyester elastomer and a preparation method thereof, which belong to the technical field of thermoplastic elastomers. In the middle soft segment chain segment structure of the aliphatic polyester elastomer provided by the invention, homopolymerization connection has the advantage which is greater than random copolymerization connection, the whole body is of a gradient gradual change structure, and meanwhile, two monomers in the random chain segment can be isomorphic crystallized; under the action of external force, homopolymerization chains existing in a middle soft segment chain segment structure are easily and orderly arranged, orientated and crystallized, and formed crystals are used as new hard phases to be filled into a whole polymer network for self-toughening; the gradient change of the high-performance aliphatic polyester elastomer provided by the invention is similar to that of an elastic network formed by a multi-block soft segment, and the stress of the material is enhanced through stress induced crystallization when the strain is provided, so that the synthesis of the super-tough thermoplastic polyester elastomer is realized, and the elastomer with high strength and high elongation at break is obtained.