169 results about "Organocatalysis" patented technology

The invention relates to a preparation method of a terephthalic acid and 2-methylimidazole organic framework catalyst, and relates to a preparation method of a high polymer material catalyst, the preparation method comprises the following steps: weighing C6H4 (COOH) 2 and 2-methylimidazole, dissolving C6H4 (COOH) 2 and C4H6N2 in N, N-dimethylformamide (DMF), weighing zinc nitrate hexahydrate (Zn (NO3) 2.6 H2O), dissolving in DMF, and preparing into a solution; the preparation method comprises the following steps: mixing a C6H4 (COOH) 2 solution and a C4H6N2 solution in proportion, and uniformly stirring; slowly adding the mixed ligand solution into a mixed solution of zinc nitrate hexahydrate (Zn (NO). 6HO) dissolved in DMF (Dimethyl Formamide), and transferring into a high-pressure reaction kettle for reaction; after cooling, centrifugally separating to obtain a white solid product, washing with methanol, and drying to obtain the Zn-MOF catalyst. The Zn-MOF catalyst provided by the invention can be widely applied to polyester synthesis, esterification reaction and other organic catalytic reactions, and especially has significant advantages in PBAT synthesis.

The invention provides synthesis and oxygen reduction application of a metal cluster / polyphthalocyanine network compounded organic electrocatalytic material. The preparation method comprises the following steps: by taking benzene ring-containing anhydride, chlorate and urea as raw materials, carrying out high-temperature reaction, cooling, and purifying for multiple times, so as to obtain an edge-functionalized polyphthalocyanine network precursor; dispersing the obtained polyphthalocyanine network precursor into a solution A by using a proper solvent; meanwhile, trifluoroacetate and a tert-butyl metal compound are mixed in a proper solvent to form a metal cluster, and the metal cluster compound is dissolved in the solvent to form a solution B; and mixing the two solutions, standing overnight, filtering, purifying, and carrying out ball milling treatment to finally obtain the target metal cluster / polyphthalocyanine network composite organic catalyst. The polyphthalocyanine oxygen reduction organic catalytic material designed by the invention is low in raw material cost and simple to prepare. The test shows that the half-wave potential of the material is 100 mV higher than that of Pt / C, the E1 / 2 reduction value is 30 mV lower than that of Pt / C after accelerated aging for 2500 circles, and the material has high activity and high stability and can be applied to devices such as lithium batteries and fuel batteries related to the oxygen reduction process.

A preparation method of 5N high-purity antimony comprises the following steps: (1) hydrolysis: taking ethylene glycol antimony as a raw material, and carrying out pyrohydrolysis pretreatment to obtain antimony trioxide; (2) biological reduction: uniformly mixing antimony trioxide with an organic catalytic reduction covering agent, and carrying out reduction smelting to prepare 4N antimony; and (3) vacuum distillation: the 4N antimony is subjected to two-stage vacuum distillation, namely first-stage high-temperature vacuum distillation and second-stage low-temperature vacuum distillation, and the 5N high-purity antimony is obtained. According to the method, an ethylene glycol antimony product is adopted as a raw material and subjected to hydrolysis-biological reduction and multi-field synergistic enhanced vacuum distillation to obtain 5N high-purity antimony, the total amount of impurity elements of the product is controlled to be 10 ppm or below, the content of key impurity elements As is controlled to be 1 ppm or below, the content of Pb is controlled to be 0.2 ppm or below, the content of Bi is controlled to be 0.2 ppm or below, the content of Cu is controlled to be 0.05 ppm or below, and the content of Fe is controlled to be 0.5 ppm or below.

The invention relates to the technical field of sizing agent preparation, and discloses polyamide and a preparation method thereof as well as a sizing agent and application thereof. The method comprises the following steps: reacting a monomer 1, a monomer 2, an optional monomer 3, triphenyl phosphate, a catalyst and an organic solvent in an inert atmosphere; wherein the monomer 1 is binary acid containing a sulfonate group, the monomer 2 is diamine, the monomer 3 is aliphatic binary acid, and the catalyst contains an organic catalyst and a metal inorganic salt catalyst. The polyamide provided by the invention has relatively high solubility; the polyamide and a polyamide resin matrix have good bonding performance, and the bonding performance of carbon fibers and polyamide resin can be greatly improved by using the polyamide as a sizing agent of the carbon fibers.

The invention relates to the technical field of organic catalysis, in particular to a method for preparing glycolaldehyde by catalyzing formaldehyde hydroformylation. The method comprises the following steps: introducing CO and H2 into a mixed solution of paraformaldehyde, a rhodium compound, a ligand and a solvent, and reacting to prepare glycolaldehyde, the ligands comprise a ligand 1 and a ligand 2; the ligand 1 is selected from one or more of compounds as shown in the following L1-L8: # imgabs0 #; the structural formula of the ligand 1 is as shown in the specification, the structural formula of the ligand 2 is as shown in the specification, namely # imgabs1 # or # imgabs2 #, R1 is H, (CH2) ACH3, O-(CH2) ACH3, X or CX3, the value range of A is 0-3, and X is a halogen atom. According to the method disclosed by the invention, different ligands are subjected to dominant combination and cooperate with the rhodium-based catalyst, so that glycolaldehyde is obtained with high conversion rate and high selectivity under relatively mild conditions.

The invention discloses a preparation method of a carbon composite material doped with multiple metal elements. The preparation process comprises the following steps: S1, dispersing a porous carbon precursor, organic lithium fluoride, an organic rare earth compound and an organic catalyst in a solvent, performing hydrothermal reaction, and drying to obtain a porous carbon precursor loaded with lithium / rare earth element / catalyst; s2, uniformly mixing the obtained material with an activating agent and a doping agent, and activating at the temperature of 900-1100 DEG C to obtain multi-metal element doped porous carbon; and S3, carrying out reduction treatment and surface passivation treatment on the multi-metal element doped porous carbon to obtain the multi-metal element porous carbon composite material. According to the obtained material, lithium-doped and rare earth-doped porous carbon is utilized to improve the electronic conductivity of the material and increase the interlayer spacing of the carbon material, a carbon nanotube is grown by utilizing a catalyst to improve the conductivity of the material and reduce expansion, and through reduction and passivation treatment, the surface activity of the material is reduced, and the first efficiency is improved.

The invention discloses a preparation method of a multi-cured UV (ultraviolet) hot melt adhesive. A mixture of the UV hot melt adhesive is prepared from the following components in parts by weight: 40 to 70 parts of polyurethane acrylate oligomer, 5 to 20 parts of thermoplastic resin, 0.1 to 0.5 part of polymerization inhibitor and antioxidant, 2 to 5 parts of mixed photoinitiator and 5 to 20 parts of diluting monomer, wherein the polyurethane acrylate oligomer is synthesized by the following steps: S1, adding polyester polyol and a polyurethane metal organic catalyst into a flask, heating and uniformly stirring; s2, isocyanate is added in the step S1, heating reaction is performed, and a reactant A is obtained; s3, hydroxyl acrylate is added into the reactant A in the step S2, heating reaction is carried out, and the product polyurethane acrylate oligomer is obtained. The multi-curing LED-UV ultraviolet curing hot melt adhesive prepared by the preparation method disclosed by the invention has the characteristic of being capable of meeting the requirement of rapid ultraviolet curing, and the cohesiveness of the hot melt adhesive can be improved, so that the hot melt adhesive is an environment-friendly and efficient hot melt adhesive.

The invention provides a preparation method of sclareolide and a catalyst, and belongs to the technical field of organic catalysis. The method comprises the following steps: dissolving sclareol by using a first solvent, adding a catalyst, adjusting the pH value of the solution under microwave conditions, dropwise adding hydrogen peroxide, heating and stirring for reaction, separating the catalyst, reusing, extracting the product by using a second solvent, and heating and refluxing to obtain sclareolide; the catalyst is imidazolyl ionic liquid / polyethylene glycol / maleic acid modified graphene oxide loaded with vacancy heteropolyacid salt. According to the preparation method of sclareolide, microwave-assisted reaction is adopted, so that the product yield of sclareolide is greatly improved. According to the invention, two mutually compatible reaction systems of alcohol and water are adopted, so that the environmental protection property of the process is greatly improved, and meanwhile, under the action of the catalyst, the method has a phase catalytic transfer effect, the reaction efficiency is improved, the reaction condition is mild, the product yield is high, and the method has a wide application prospect.

The application belongs to the field of catalyst synthesis, and relates to a polymer polynuclear boron organic catalyst, a preparation method and application thereof, the preparation method of the catalyst comprises the following steps: adding tetrahydrofuran into a catalyst precursor, then adding a borohydride reagent drop by drop, heating the reaction mixture at 25-80 DEG C for 22-26 h, vacuum concentrating the reaction mixture to obtain a crude product, purifying the crude product by washing with pentane for 2-5 times, and vacuum drying the product at normal temperature for 10-14 h to obtain the catalyst; the catalyst precursor and a preparation method thereof are also provided; the polymer polynuclear boron organic catalyst provided by the application has the advantages of high activity, simple preparation method and low cost, and the catalyst can control the polymer substrate type and the polymer type by adjusting the reaction conditions, the catalytic system and the substrate, and can efficiently prepare polymers such as polyether, polyester and polycarbonate due to the synergistic effect of the polynuclear boron center, so that the types of the organic catalyst and the polymer are greatly expanded.

The invention relates to a titanium silicalite molecular sieve and a preparation method and application thereof in organic catalytic reaction, and the preparation method comprises the following steps: (1) mixing a titanium source, a crown ether compound and an optional solvent to obtain a titanium-containing precursor solution; (2) performing hydrolysis treatment on the titanium-containing precursor solution, a silicon source and a template agent in a contact manner to obtain a hydrolysis mixture; and (3) carrying out hydrothermal crystallization treatment, drying treatment and roasting treatment on the hydrolysis mixture. The problem that the content of non-framework titanium of the titanium silicalite molecular sieve is high can be effectively solved, and the catalytic activity of the titanium silicalite molecular sieve in an organic catalytic reaction is improved.

The application discloses a method for synthesizing nitrogen-containing heteroarene carboxylic acid compounds based on nitrogen-containing heteroarene carbon-hydrogen bond carboxylation reaction and belongs to the technical field of organic synthesis, and specifically comprises the following steps: adding a reaction substrate, an organic catalyst, a base and an additive into a reaction container, then adding a solvent under a CO2 atmosphere, and stirring and reacting at room temperature or under heating in a light irradiation condition; and performing post-treatment on a reaction product, separating and purifying the reaction product, and obtaining nitrogen-containing heteroarene carboxylic acid compounds and derivatives thereof. The scheme has the characteristics of mild reaction condition, wide reaction substrate range, good yield and good regioselectivity, and cheap and easily-obtained raw materials, can efficiently realize nitrogen-containing heteroarene carbon-hydrogen bond carboxylation reaction, synthesize important nitrogen-containing heteroarene carboxylic acid compounds, and has a good application prospect.

The invention discloses a high performance liquid chromatography analysis method for trace impurity content in an organic amine catalyst, and relates to the field of organic catalyst content analysis. Comprising the following steps: pretreating an organic amine catalyst sample, preparing a urea standard solution, performing HPLC (High Performance Liquid Chromatography) analysis and performing quantitative analysis by an external standard method, namely performing derivatization reaction on urea and benzaldehyde under an acidic condition, and successfully converting urea without ultraviolet absorption into dibenzylidene urea (DBU) with strong ultraviolet absorption, the technical blank of direct detection of urea is effectively filled, and the method is adaptive to a conventional ultraviolet / visible light detector to realize accurate detection. And the method has relatively high practical popularization and application values. The method has the advantages of being good in separation effect, high in sensitivity, easy and convenient to operate, high in reproducibility and the like, and can be widely applied to qualitative and quantitative analysis of various trace impurities in the organic amine catalyst.

The invention discloses a novel metal-free iodine-based binary catalyst system, belongs to the technical field of organic catalysis and high polymer materials, and is characterized in that an iodine-based charge transfer compound composed of I2, tetrabutylammonium acetate (TBAAc) and other quaternary ammonium salts catalyzes and oxidizes heterobutane and cyclic anhydride for controlled alternate ring opening copolymerization. In addition, the method has been effectively applied to ring-opening copolymerization by combining an epoxide and a cyclic anhydride. The catalyst system in the preparation method disclosed by the invention has the advantages of low cost, easiness in obtaining, low potential toxicity and biodegradability, and has a great practical application value.

The invention discloses a monomolecular bifunctional organic catalyst for ring-opening copolymerization of epoxide and cyclic anhydride. The structural formula of the monomolecular bifunctional organic catalyst is shown as a formula (I). In the formula (I), the structural formula of X is shown as the following formula (II-1) or (II-2), and in the formula, B is a boron atom; r1 is selected from alkyl; # imgabs0 # represents a connecting bond; the structural formula of Y is as shown in the following formula (III), wherein O is an oxygen atom; r2 is selected from one or more of Li, Na, K, Cs, quaternary ammonium cations and bis (triphenylphosphine) ammonium cations; l is selected from the group consisting of unsubstituted C4-C11 alkyl groups; the monomolecular bifunctional organic catalyst disclosed by the invention is specially used for the ring-opening copolymerization reaction of epoxide and cyclic anhydride, the TOF of the monomolecular bifunctional organic catalyst can be up to 13500h, and the prepared polymer has high molecular weight and low molecular weight distribution and also shows excellent air stability and thermal stability. # imgabs1 # (I); # imgabs2 # (II-1); 3 # imgabs3 # (II-2); and 4 # imgabs4 # (III).

The application discloses a triphenylmethane polyether dye and a preparation method thereof, and the preparation method comprises the following steps: (1) adding an organic catalyst and an oxidant into a triphenylmethane polyether dye leucoaqueous solution in the interval of 40-60 DEG C, adding an acid-binding agent to maintain a proper pH, and completing oxidation; the organic catalyst is a ferrocene-rotene iron compound; (2) adjusting the pH with an acid-binding agent aqueous solution, removing the organic catalyst by hot filtration, removing water through vacuum distillation of the filtrate, and performing pressure filtration to obtain the triphenylmethane polyether dye. The improved rotene iron catalyst is used in the application, the catalytic effect is obviously improved, the reaction temperature and activation energy are reduced, the defects of excessive hydrogen peroxide oxidation are overcome, and the obtained product meets the EN71-3 standard.

The invention provides a preparation method and application of an amorphous zirconium-doped manganese oxide catalyst, and belongs to the field of organic catalytic synthesis. The catalyst is Zr-MnO2-x, and is rich in lattice oxygen with high activity and high stability; x is the molar ratio of Zr to the sum of Mn and Zr, and x is larger than or equal to 0.2 and smaller than or equal to 0.6; zirconium mainly exists in the form of zirconium hydroxide. The preparation method comprises the following steps: slowly dropwise adding a mixed salt solution of a zirconium source and a manganese source into a precipitant under a continuous stirring condition, and carrying out a co-precipitation reaction; after the reaction is completed, standing and aging, carrying out solid-liquid separation and collecting a precipitate; and washing and drying to obtain the amorphous zirconium-doped manganese oxide catalyst which is used for catalyzing aniline and derivatives thereof to synthesize azobenzene compounds. According to the invention, the characteristic of'difunctional lattice oxygen 'with high activity and high stability is introduced through zirconium doping, and the catalyst has the advantages of high activity, high selectivity, wide substrate applicability, excellent stability and reusability and the like when used for catalytic synthesis of azobenzene compounds.

The invention provides low-molecular-weight liquid epoxy resin and a preparation method thereof. The preparation method does not need to introduce substances such as sodium hydroxide, and specifically comprises two steps of reaction, in the first step of reaction, a component A (epichlorohydrin) and a component B (polyphenol and / or polybasic acid) react under the action of an organic catalyst (any one or more of organic ion salt, Lewis alkali, Lewis acid or Lewis acid-base pair), and the component A (epichlorohydrin) and the component B (polyhydric phenol and / or polybasic acid) react under the action of an organic catalyst (any one or more of organic ion salt, Lewis alkali, Lewis acid or Lewis acid-base pair); the method comprises the following steps: mixing a component A and a component B to obtain a mixed crude product comprising low-epoxy-value epoxy resin and an organic catalyst, then mixing the crude product with an epoxidation reagent, and further epoxidizing (in order to promote forward movement of reaction balance to enable epoxidation to be complete, the step can be repeated for 1-2 times according to the chemical properties of the component B to enable the final product to have an epoxy blocking rate gt; and finally, the low-molecular-weight liquid epoxy resin meeting the requirements is obtained. Through testing, the epoxy end-capping rate gt of the low-molecular-weight liquid epoxy resin is gt; 99%.

The invention discloses an ultrasonic enhanced organic catalytic continuous flow polypeptide synthesis method. The preparation method comprises the following steps: (1) respectively dissolving an amino alcohol initiator, an organic catalyst and an amino acid intracyclic anhydride monomer in an organic solvent; (2) injecting the three solutions into a tubular reactor equipped with an ultrasonic water bath constant-temperature oscillator; (3) realizing continuous flow precise synthesis of polypeptide with different molecular structure parameters by adjusting the types of three reactants, namely an amino alcohol initiator, an organic catalyst and an amino acid intracyclic anhydride monomer, the sequence of injecting the reactants into the reactor and the relative speed of injecting the reactants into the reactor; and (4) carrying out flowing ring-opening polymerization reaction, flowing into a collecting bottle containing a reaction terminator, precipitating, centrifuging, and carrying out vacuum drying to remove the residual solvent, thereby obtaining the polypeptide. The method provided by the invention has the characteristics of high synthesis efficiency, no metal catalyst residue in the product, easy regulation and control of product structure parameters, easy non-amplification, easy large-scale production and easy automatic production.

The invention discloses a gas decontamination and hydrolysis composite tank and a blast furnace gas fine desulfurization system, comprising a reaction tank body, wherein a gas inlet and a gas outlet are radially arranged on the reaction tank body, three mesh partitions are arranged inside the reaction tank body, the mesh partitions are arranged parallel to the center line of the reaction tank, and the gas flows radially along the tank body. The mesh partitions divide the interior of the reaction tank body into a gas distribution chamber, a decontamination chamber, a catalytic hydrolysis chamber and a gas collecting chamber. The gas inlet is arranged on the gas distribution chamber side of the reaction tank body, and the gas outlet is arranged on the gas collecting chamber side of the reaction tank body. A decontamination agent is placed in the decontamination chamber, and an organic catalytic converter is placed in the catalytic hydrolysis chamber. The gas enters the gas distribution chamber from the gas inlet, flows uniformly toward the decontamination chamber and the catalytic hydrolysis chamber, and is discharged through the outlet after merging in the gas collecting chamber. The gas has low resistance along the gas flow and low pressure loss, and can meet the requirements of removing harmful impurities in blast furnace flue gas and catalytically hydrolyzing organic sulfides.

The application discloses a supported chiral phosphine heterogeneous catalyst and a preparation method and application thereof, and relates to the technical field of heterogeneous catalyst preparation. The method comprises the following steps: mixing hollow mesoporous polystyrene nanospheres, chiral phosphine and DCE, stirring, adding FDA, stirring, adding concentrated sulfuric acid dropwise, and reacting to obtain a reactant one; and mixing the reactant one, toluene, tetramethyldisiloxane and tetraisopropyl titanate, and reacting under temperature rise to obtain the supported chiral phosphine heterogeneous catalyst. The application is simple and convenient in a one-pot method, and can efficiently anchor the chiral phosphine and its oxide catalyst to the carrier. The application solves the problems of complicated modification in the existing organic catalyst immobilization process and mass transfer limitation of the prepared catalyst.

The application discloses a single-molecule bifunctional organic catalyst, and a structural formula is shown in the following formula (I), wherein X is selected from a urea or thiourea containing group, a structural formula is shown in the following formula (II), Y is selected from a potassium alcoholate or sodium alcoholate group, a structural formula is shown in the following formula (III), and L is selected from an unsubstituted C2-C4 alkyl group; the single-molecule bifunctional organic catalyst disclosed by the application has a novel structure, has super-high activity and high controllability when catalyzing ring-opening polymerization of a lactone, and the highest turnover number (TON) can reach 900, and the highest turnover frequency (TOF) can reach 4860 min ‑1 , and the prepared polymer has high molecular weight and low molecular weight distribution.

This invention provides a neutral-electron-reversed carbene, its preparation method, and its applications, belonging to the fields of organic chemistry and organic catalysis. The neutral-electron-reversed carbene described in this invention has the structure shown in formula (I). This invention synthesizes the neutral-electron-reversed carbene in one step by reacting a diazo compound as a precursor with a rhodium complex, followed by nitrogen removal and COD (1,5-cyclooctadiene) removal processes. The reaction conditions of this invention are simple, and the yield is good. Stable separation of neutral-electron-reversed carbene is achieved for the first time.

A rolling roll according to an embodiment of the present invention comprises: a roll base material; and a chromium-containing plating layer which is formed on the roll base material and in which the maximum length of cracks formed on the surface thereof is 5 µm or less. A rolling roll according to another embodiment of the present invention comprises: a roll base material; a chromium-containing plating layer formed on the roll base material; and a first coating layer formed on the chromium-containing plating layer and containing a titanium nitride. A method for manufacturing a rolling roll according to another embodiment of the present invention comprises the steps of: forming surface recesses and projections on the surface of a roll base material; forming a chromium-containing plating layer on the roll base material by using a plating solution containing a chromium-containing raw material and sulfuric acid; and applying a metal nitride onto the chromium-containing plating layer. In the step of forming the chromium-containing plating layer, the plating solution further contains a sulfonic acid-based organic catalyst, or plating is performed in a state in which the plating solution has been heated to 65-90°C. A method for manufacturing a secondary battery according to another embodiment of the present invention comprises the steps of: forming an electrode active material layer on a current collector; and rolling the electrode active material layer using said rolling roll.

The invention relates to a catalyst composition and a preparation method of thermotropic liquid crystal polyarylester under catalysis. The catalyst composition comprises an organic catalyst and an inorganic catalyst. The polymerization reaction rate is obviously improved, and the thermotropic liquid crystal polyarylester is efficiently prepared. The thermotropic liquid crystal polyarylester prepared by the method has excellent comprehensive performance, high modulus and high thermal stability, and has important application value in the field of high-performance composite materials.

The invention discloses a chiral 6-NH2 uracil compound as well as a preparation method and application thereof, and belongs to the technical field of chemical synthesis. The invention provides a method for constructing C-N axial chiral 6-NH2 uracil and a corresponding amide compound thereof through asymmetric organic catalysis, under the catalysis of chiral phosphoric acid, racemization 6-NH2 uracil and azlactone are used as reaction substrates, and 6-amide uracil with optical activity is obtained by utilizing a kinetic resolution strategy. And the 6-NH2 uracil compound with optical activity is recovered. According to the method, chiral uracil is constructed by using an asymmetric catalysis strategy for the first time, and the method has the characteristics of convenience in operation, cheap and easily available raw materials, and high yield and enantioselectivity. The C-N axial chiral uracil shows excellent anti-tumor cell activity, and especially has excellent biological activity on colon cancer, cervical cancer, multiple myeloma, prostate cancer cells and the like.

The present invention belongs to the technical field of catalysts and their applications, and relates to a squaramide ionic organic catalyst and a synthesis method and application thereof. The squaramide ionic organic catalyst has a structural formula as shown below: The catalyst disclosed in the present invention has a simple structure, an easy-to-operate synthesis route, and low cost. It has good catalytic activity in ring-opening polymerization reactions and alternating copolymerization reactions, can improve polymer purity and yield, and has strong industrial application prospects.

The invention provides a catalyst as well as a preparation method and application thereof, and relates to the technical field of organic catalytic synthesis, the catalyst comprises a mesoporous zirconium-silicon composite oxide, and active metal cobalt and auxiliary metal which are loaded on the mesoporous zirconium-silicon composite oxide; the auxiliary metal comprises one or two of copper metal and nickel metal. Based on the catalyst provided by the invention, the problems of high cost, low active metal utilization efficiency, poor carrier stability and many byproducts of the catalyst in the prior art are solved.

The invention relates to a synthetic method of high polymer material polyester, in particular to a method for synthesizing polyester through ring opening polymerization of cyclic ester monomers. According to the invention, an imidazolyl ionic liquid with 1-alkyl-3-methylimidazole cation as a catalyst is used for catalyzing ring opening polymerization of a cyclic ester monomer to obtain polyester. According to the invention, the imidazolyl ionic liquid is used as a catalyst, the catalytic activity is high, the cyclic ester monomer can be subjected to ring-opening polymerization without an alcohol initiator, and under the condition of short reaction time, the monomer conversion rate is high, the number-average molecular weight of the product is high, and the molecular weight distribution is narrow; the technical problem that an existing organic catalyst applied to catalysis of polyester ring-opening polymerization is relatively low in catalytic activity is solved. The imidazolyl ionic liquid catalyst has the characteristics of low toxicity and no pollution; the method for catalyzing ring opening polymerization of the cyclic ester monomer through the imidazolyl ionic liquid is a green synthesis method of polyester.

The present invention discloses a method for synthesizing dithiocyclic carbonates, belonging to the technical field of organic catalysis. By using a brand-new organic neutral catalyst, the [3+2] cycloaddition reaction of epoxides and carbon disulfide can be achieved at room temperature within a short time, and dithiocyclic carbonates can be obtained with high selectivity. This catalytic system has excellent catalytic effects on different aliphatic and aromatic epoxides, and the yields of most of them reach over 90%. The dithiocyclic carbonate products have no metal residues and have great potential for commercial applications in fields such as biomedicine and polymer production where strict requirements are imposed on the content of metal residues.