21results about How to "Enhanced nucleophilicity" patented technology

The invention discloses a bio-based isosorbide carbonate plasticizer and a preparation method and application thereof, and relates to the technical field of plastic processing assistants.The preparation method of the bio-based isosorbide carbonate plasticizer comprises the steps that in the atmosphere of protective gas, diester carbonate and isosorbide serve as raw materials to be subjected to transesterification with a catalyst; and after the reaction is completed, carrying out post-treatment to obtain the isosorbide carbonate plasticizer. The isosorbide carbonate plasticizer disclosed by the invention can effectively reduce the melting temperature and melt viscosity of a material, improve the processability of the material, increase the flexibility of the material and improve the optical transmittance of the material. The preparation method disclosed by the invention has the characteristics of being simple in process, green and environment-friendly, easily available in raw materials, easy in catalyst separation and relatively high in product yield, and is an efficient and environment-friendly preparation process of isosorbide carbonate.

The invention discloses a lithium ion battery non-combustible electrolyte and a preparation method and application thereof, and relates to the technical field of electrolyte preparation. The electrolyte comprises an organic solvent, a lithium salt, fluorophosphate and a film-forming additive, wherein the film-forming additive is aluminum isopropoxide. The preparation method disclosed by the invention is simple, mild in condition, low in cost and suitable for large-scale industrial production, not only meets the requirements of the existing market on non-combustible and high-safety performance of the electrolyte, but also has relatively wide application and production prospects. The problem that an existing electrolyte is poor in safety performance is solved.

The invention relates to the technical field of gas separation materials, in particular to a preparation method of a high-selectivity functionalized ZIF-7-8 mixed matrix membrane. The preparation method comprises the following steps: taking pebax-1657 as a matrix material of a mixed matrix membrane, synthesizing a ZIF-7-8 filling material by virtue of a non-solvent induced crystallization (NSIC) method, then carrying out ionic liquid impregnation on ZIF-7-8, and finally preparing the high-performance mixed matrix membrane in a blending manner, so as to obtain the functional modified ZIF-7-8 mixed matrix membrane material. 1-butyl-3-methylimidazole bis (trifluoromethanesulfonyl) imide salt ([bmim] [Tf2N]) is adopted as an ionic liquid, ZIF-7-8 is subjected to functionalization treatment through a post-synthesis method, and the ionic liquid with high affinity to CO2 is loaded in a nanomaterial pore cage, so that the adsorption capacity of the material to CO2 is improved, and the performance of the membrane material is further optimized; therefore, the purpose of improving the CO2 separation performance of the mixed matrix membrane is achieved.

The application discloses a carbon dioxide electrochemical trapping agent and a carbon dioxide trapping device. The carbon dioxide electrochemical trapping agent utilizes an electrochemical reduction state of an organic disulfide molecule to trap carbon dioxide; the organic disulfide molecule comprises an unsaturated aliphatic disulfide, an aromatic disulfide or a mixture thereof; the S atom of the unsaturated aliphatic disulfide is connected with an unsaturated aliphatic group having a bond; and the S atom of the aromatic disulfide is connected with an aromatic group having a bond. The application aims to connect the S atom in the disulfide molecule with a structure having a bond and expand the conjugated structure, so as to regulate the redox potential of the disulfide molecule, the energy consumption of trapping CO2 and the nucleophilicity of the sulfenyl / sulfanyl anion after reduction to CO2.

The present invention belongs to the technical field of heterocyclic compounds, and in particular to a method for synthesizing ceftazidime side chain acid ethyl ester. N,N-dimethylformamide solution of isobutyric acid and chlorine are added to a chlorination microchannel reactor for mixing, added to a pipeline reactor for reaction, and N,N-dimethylformamide solution of chloroisobutyric acid is obtained; N,N-dimethylformamide solution of chloroisobutyric acid and isobutylene are added to a loop reactor for reaction, and N,N-dimethylformamide solution of tert-butyl chloroisobutyrate is obtained; N,N-dimethylformamide solution of ethyl demethylaminothioxamyl, N,N-dimethylformamide solution of tert-butyl chloroisobutyrate and a composite condensation catalyst solution are added to a primary microchannel reactor for primary reaction; a primary reaction liquid and water are added to a secondary microchannel reactor for secondary reaction, and ceftazidime side chain acid ethyl ester is obtained. The present invention has the advantages of high reaction efficiency and high reaction yield.

The invention discloses porous adsorption resin for silane purification and a preparation method of the porous adsorption resin, and belongs to the technical field of silane production. The porous adsorption resin is prepared from the following components in parts by weight: 100 to 200 parts of deionized water, 10 to 30 parts of modified mesoporous magnetic particles, 20 to 40 parts of acrylic resin monomer, 5 to 15 parts of N, N-methylene bisacrylamide, 10 to 20 parts of polypropylene glycol monomethyl ether acrylate and 20 to 50 parts of initiator aqueous solution. The prepared porous adsorption resin can efficiently remove chloride ions and metal impurities in silane, the purity of a silane product is improved, the product purity can reach 99.998% or above, the requirement for the purity of silane in the high-end application field is met, good adsorption stability is achieved, bonding between the adsorption resin and the silane impurities is firmer, and the service life of the adsorption resin is prolonged. According to the present invention, the high adsorption capacity can be maintained after the multi-time cycle use, such that the purification precision and the purification effect are improved due to the appropriate pore size distribution, the selectivity on the impurity adsorption is provided, and the targeted adsorption can be performed according to the size and the property of the impurity molecule.

The invention discloses an efficient and stable heterogeneous catalyst containing Lewis acid as well as a preparation method and application of the efficient and stable heterogeneous catalyst, and belongs to the technical field of cycloaddition reaction catalysts. The heterogeneous catalyst has groups with strong nucleophilicity and strong electrophilicity. The Lewis acid-containing raw material is selected from one of zinc acetate, cobalt acetate, copper acetate, ferrous acetate, magnesium acetate, nickel acetate, calcium acetate, manganese acetate, lead acetate and tin acetate. The prepared heterogeneous catalyst containing Lewis acid is applied to catalysis of cycloaddition reaction of epoxide and CO2, and the cycloaddition reaction of ethylene oxide (EO) / propylene oxide (PO) and CO2 is preferentially adopted. The problems that a homogeneous catalyst is difficult to separate and a heterogeneous catalyst is insufficient in activity are preferably solved.

The invention relates to a resin composition as well as a preparation method and application thereof. The resin composition comprises mixed resin, an accelerant and curing agents, the mixed resin comprises epoxy resin and functional resin, the functional resin comprises polar groups with the dipole moment larger than 0.7, the mass fraction of the polar groups in the functional resin is 3%-15%, and the curing agents comprise a medium-temperature curing agent and a low-temperature curing agent. The resin composition can be rapidly cured at the temperature of 120 DEG C or below, meanwhile, a prepreg prepared from the resin composition is excellent in latency, and a composite material further prepared from the resin composition has excellent heat resistance.

The invention relates to the technical field of environment-friendly degradable polymers, in particular to a polylactic acid composition capable of being subjected to household composting degradation and a preparation method of the polylactic acid composition. The invention discloses a polylactic acid composition capable of being subjected to household composting degradation. The polylactic acid composition comprises the following raw materials in parts by weight: 60-70 parts of polylactic acid, 10-20 parts of polyhydroxyalkanoate, 8-12 parts of a diatom shell complex and 2-4 parts of a compatilizer, a Co-based zeolite imidazate framework is loaded in the diatom shell complex. The polylactic acid composition capable of degrading the household compost has a three-in-one degradation mode of hydrolysis, alcoholysis and photolysis, and has the effects of short degradation time and excellent degradation effect.

This invention belongs to the field of acyclic compound technology, specifically relating to a method for preparing tert-amyl peroxide. A tert-amyl hydrogen peroxide aqueous solution is added to a solvent and stirred to obtain a mixed solution. Under stirring conditions, p-toluenesulfonic acid and ferric phosphide are added sequentially to the mixed solution. After the addition is complete, stirring continues to produce reaction solution I. Under stirring conditions, acetic anhydride is added to reaction solution I. After the addition is complete, stirring continues to produce reaction solution II. A washing solution is added to reaction solution II, and the mixture is stirred and washed, then separated to obtain crude tert-amyl peroxide. The crude tert-amyl peroxide is washed, dried, and the solvent is removed to obtain tert-amyl peroxide. This invention avoids the problems of large amounts of hydrochloric acid produced by traditional acyl chloride methods and the corrosiveness caused by using sulfuric acid as a catalyst. Furthermore, ferric phosphide is magnetic, allowing for recycling through magnetic separation after the reaction. p-Toluenesulfonic acid can be regenerated through ion exchange resin, significantly reducing production costs.

The invention discloses a hydrophilic modified polysulfone resin with carboxyl side groups and a preparation method thereof, and relates to the technical field of polysulfone. The invention adopts deionized water as a salt-forming solvent to carry out a salt-forming reaction of a bisphenol monomer. After the salt-forming reaction is completed, the salt-forming agent of the system is reacted, and after the alkalinity is weakened, an NMP solvent is added to collect water, thereby reducing the interference of NMP decomposition on the carboxyl group in the salt-forming stage, and the ratio of the diphenolic acid connected to the molecular chain is consistent with the feed ratio, so that the formed hydrophilic modified polysulfone resin component is more stable; at the same time, before the end-capping, the side chain carboxyl group forms a stable coordination complex, so that the diphenolic acid type hydrophilic polysulfone of the invention can be end-capped, greatly reducing the content of the phenolic end group with poor thermal stability, so that the original color can be maintained during extrusion granulation.

The present invention provides a graphite negative electrode material and a preparation method thereof and a battery, belonging to the technical field of negative electrode materials for new energy batteries. The preparation method of the graphite negative electrode material comprises: 1. adding expanded graphite to a zinc chloride solution, then adding sodium dodecylbenzene sulfonate, heating and stirring, filtering the reacted mixed solution after the stirring is completed, separating the zinc-containing graphite material, washing and drying for standby use; 2. adding the zinc-containing graphite material to a phytic acid solution, heating and stirring, filtering the reacted solution after the stirring is completed, separating the graphite solid, washing and drying for standby use; 3. adding the graphite solid to an ethyl orthosilicate solution, heating and stirring, filtering the reacted solution after the stirring is completed, separating the solid product, washing and drying to obtain a graphite negative electrode material. The graphite negative electrode material prepared by the above method constructs a cross-linked network between the graphite layers inside and outside the expanded graphite by zinc chloride, phytic acid and ethyl orthosilicate, thereby improving the stability of the expanded graphite.

The invention belongs to the field of waste resource utilization, and particularly relates to a method for treating alpha-pyrrolidone rectification residues, and the residues comprise N-methyl-2-pyrrolidone, 3-methyl-2-pyrrolidone, 4-methyl-2-pyrrolidone, 4-pyrrolidone butyramide, an oligomer and a heavy component. The method comprises the following steps: S1, carrying out separation treatment on rectification residues, so as to obtain a first mixture containing N-methyl-2-pyrrolidone, 3-methyl-2-pyrrolidone and 4-methyl-2-pyrrolidone, and a second mixture containing 4-pyrrolidone butyramide, an oligomer and a heavy component. S2, performing hydroxylation or amination treatment on the first mixture, and then reacting with boric acid to obtain the lubricating oil anti-wear agent. And S3, the second mixture is subjected to oxidation and saponification, and a saponification product is prepared. According to the method, useful components in the rectification residues are fully utilized, resource waste and environmental pollution can be reduced, and economic benefits are improved.

The invention discloses a preparation method of 2, 6-naphthalic acid glycol ester, which belongs to the technical field of organic chemical synthesis, and comprises the following steps: firstly, mixing 2, 6-naphthalic acid and ethylene glycol according to a molar ratio of 1: 2 to 1: 3; secondly, 0.1%-0.5% of a catalyst is added into the mixture, and 0.2% of butyl titanate is particularly used as the catalyst in the embodiment; then reacting the mixture at a temperature of 100 DEG C to 150 DEG C for 4 to 6 hours; finally, unreacted ethylene glycol and generated moisture are removed through vacuum distillation, a solid-phase extraction column is used for further purifying the product to improve the purity and yield of the product, the method is characterized in that MOFs is used for carrying out loading treatment on butyl titanate in the aspect of use and treatment of the catalyst, and in addition, by adding magnetic MOFs, the purity of the product is greatly improved. The method realizes rapid recovery and reuse of the catalyst, greatly improves the environmental friendliness and economic benefits of the whole production process, and has important practical value and wide application prospects.

This invention relates to the field of lithium battery material recycling technology, specifically to a method for recycling and utilizing cathode materials from retired lithium iron phosphate batteries. The recycled retired lithium iron phosphate battery cathode materials are crushed, and the fragments are soaked in a solvent with stirring. After filtration, the filter residue is repeatedly washed with deionized water and dried to obtain coarse powder of the recycled cathode material. The coarse powder is subjected to ICP testing, and lithium, iron, phosphorus, grinding aids, and anhydrous ethanol are added for wet ball milling. After ball milling, the powder is dried to obtain a precursor. The precursor is then sintered under a nitrogen atmosphere to obtain the lithium iron phosphate cathode material. This method for recycling retired lithium iron phosphate battery cathode materials is simple, environmentally friendly, and economically efficient. The recycled cathode material meets the requirements for use in the battery industry.

The present invention provides a feed additive for removing heavy metal residues, and a preparation method and application thereof, which belong to the field of feed processing technology and the field of development and utilization of edible natural plant resources. The feed additive of the present invention includes lycopene and plant extracts; the plant extracts include carrot extract, wolfberry extract, astragalus extract, ginseng extract, monk fruit extract, ginkgo leaf extract, green tea extract, honeysuckle extract, ganoderma extract, grape seed extract, mulberry extract and rhodiola rosea extract. The feed additive has a strong adsorption effect and nucleophilicity, and can form a complex with harmful heavy metal ions, so that these heavy metals cannot be oxidized to produce toxic substances, and are excreted from the body in the form of complexes through metabolism, thereby eliminating or reducing the harm and residues of harmful heavy metals to animal bodies. The feed additive fills the gap in the market for heavy metal reduction control feed additives, and has a good promotion prospect.

The invention relates to the technical field of curing agents, in particular to cured cross-linked rubber added with epoxy resin and a preparation method of the cured cross-linked rubber. The adhesive comprises the following components in parts by weight: 50-70 parts of epoxy resin, 20-40 parts of silicone rubber, 5-15 parts of a modified maleic dihydrazide curing agent, 2-8 parts of a dibenzoyl peroxide cross-linking agent, 5-15 parts of a carboxyl-terminated polybutadiene toughening agent, 5-20 parts of silicon dioxide filler and 5-10 parts of ethanol. Alpha, beta-unsaturated ketone compounds are added, and after the alpha, beta-unsaturated ketone compounds react with the maleic dihydrazide curing agent, new functional groups and chemical structures can be introduced into curing agent molecules, so that the flexibility of the curing agent molecules can be improved; the negative ions of the base catalyst can capture reactive hydrogen of maleic dihydrazide to form maleic dihydrazide negative ions with higher nucleophilicity, and the negative ions can perform nucleophilic addition on beta-carbon of the alpha, beta-unsaturated ketone compound more easily, so that the performance of the curing agent can be improved.

The invention discloses a polyurethane-pressure-sensitive adhesive composite structural adhesive and a preparation method thereof, and relates to the field of adhesive preparation. According to the invention, the polyurethane and the pressure-sensitive adhesive are compounded to prepare the polyurethane-pressure-sensitive adhesive composite structural adhesive; during compounding, the polyurethane and the pressure-sensitive adhesive can further react, so that the compounding effect is enhanced; the polyurethane comprises polyurethane subjected to chain extension by diamine; the pressure-sensitive adhesive comprises an acrylate resin modified pressure-sensitive adhesive. The polyurethane-pressure-sensitive adhesive composite structural adhesive prepared by the preparation method disclosed by the invention is stronger in cohesive force and adhesive force, simple in preparation process and wide in application value.

The invention discloses a method for chemically recovering polyethylene glycol terephthalate by using a deep eutectic solution, which relates to a plastic chemical recovery method and mainly comprises the following steps: preparing an ethylene glycol and thymol deep eutectic solution, catalyzing ethylene glycol alcoholysis of polyethylene glycol terephthalate by using the deep eutectic solution, and separating a monomer product. And recovering the deep eutectic solution. The invention provides a recovery method based on a deep eutectic solution to solve the problems of slow reaction rate, low activity, easy catalyst residue, easy catalyst loss and the like in the existing plastic chemical recovery technology. The used deep eutectic solution not only can strengthen the nucleophilic ability of the degradation agent ethylene glycol, but also can improve the swelling degree of polyethylene glycol terephthalate in a reaction system, and has the recycling potential. According to the ethylene glycol alcoholysis chemical recovery process of polyethylene glycol terephthalate, the reaction efficiency can be improved, the reaction time can be shortened, and the reaction temperature can be reduced.

The invention relates to an electrolyte, a battery and electric equipment. The electrolyte comprises a first additive and a second additive, the first additive is a sulfonamide additive, and the first additive comprises a cyclic conjugated group; the second additive is an annular sulfur-containing additive.

This invention belongs to the field of lithium-ion battery material preparation technology, and discloses a one-step method for preparing lithium bis(fluorosulfonyl)imide using ionic liquid catalysis and hydrogen fluoride. This method solves the problems of low catalytic efficiency, insufficient product purity, difficult separation, and high environmental impact in existing preparation routes. Using bis(fluorosulfonyl)imide and lithium fluoride as raw materials, anhydrous hydrogen fluoride as the fluorinating agent, and an imidazole-based ionic liquid as the catalyst, under an inert atmosphere, the reaction system is prepared, followed by an integrated fluorination-lithiation reaction and post-treatment purification steps to obtain high-purity lithium bis(fluorosulfonyl)imide. This invention achieves efficient reaction under mild conditions through the synergistic effect of a specific ionic liquid and hydrogen fluoride gas, solving the problems of harsh reaction conditions, low yield, and insufficient purity in existing processes. The product yield is ≥92%, and the purity is ≥99%. The process is simple, safe, and environmentally friendly, suitable for large-scale industrial production, and can be widely used in the preparation of lithium-ion battery electrolytes.