24 results about "Benzoic anhydride" patented technology

The invention provides a multi-aperture two-dimensional covalent organic framework material based on carbon-carbon double bond connection as well as a preparation method and application of the multi-aperture two-dimensional covalent organic framework material. The preparation method comprises the following steps: (1) under a protective atmosphere, putting 6, 6 '-dimethyl-3, 3'-bipyridazine, a multi-aldehyde aromatic monomer and benzoic anhydride into an ampoule bottle, the multi-aldehyde aromatic monomer being selected from a tri-aldehyde aromatic monomer or a tetra-aldehyde aromatic monomer; and (2) quickly freezing the ampoule bottle in the step (1) in a 77K liquid nitrogen bath, carrying out unfreezing circulation degassing through three freezing pumps, carrying out heating reaction at 150-250 DEG C for 72-120 hours, cooling to room temperature, and carrying out post-treatment to obtain the multi-aperture two-dimensional covalent organic framework material based on carbon-carbon double bond connection. The two-dimensional COFs obtained by performing a Navenger condensation reaction on an active methyl monomer and a multi-aldehyde aromatic monomer has relatively high crystallinity, specific surface area and stability, uniform two-dimensional layered morphology and a relatively wide absorption spectrum range, and the topological structure of the COFs comprises a uniform pore diameter and three different pore diameters.

The invention discloses a vinylidene bridged covalent organic framework material based on 2, 7-diaza pyrene and a preparation method thereof.The 2, 7-diaza pyrene is used as a core monomer, under the catalysis of benzoic acid and benzoic anhydride, methyl is activated to form an enamine intermediate, aryl aldehyde is attacked to form unsubstituted carbon-carbon double bonds, and under the heating condition, the 2, 7-diaza pyrene is synthesized into the vinylidene bridged covalent organic framework material based on 2, 7-diaza pyrene. And two vinylidene bridged COFs materials with high crystallinity are successfully synthesized. The COFs material disclosed by the invention has a high specific surface area, a uniform through rhombic pore channel structure and excellent chemical stability, and has an important application prospect in the field of photoelectrocatalysis.

This invention discloses a low-VOCs, low-odor environmentally friendly material for the production of sealing strips for passenger vehicles and its preparation method, belonging to the field of polymer materials technology. The technical solution includes the following raw materials in parts by weight: 100 parts PVC resin; 5 parts stabilizer; 40-60 parts plasticizer; 0.4-0.6 parts lubricant; 1.3-1.5 parts antioxidant; 0.3-0.4 parts ultraviolet absorber; 0.3-0.5 parts deodorizer A; 0.8-1.0 parts deodorizer B; 10-25 parts light active calcium carbonate; 1.0-1.2 parts pigment; deodorizer A is a complex of zinc amino acid, and deodorizer B is benzoic anhydride-intercalated modified aluminum-magnesium hydrotalcite. This invention can capture free, irritating small-molecule alcohols and convert them into esters with milder odors, effectively preventing alcohols from being converted into irritating ethers and ketones during processing, thus reducing the odor and VOCs of passenger vehicle sealing strips.

The invention discloses a preparation method of a bumetanib injection, and belongs to the technical field of medicines. The method comprises the following steps: (1) preparing materials, namely respectively weighing bumetanib, xylitol, sodium dihydrogen phosphate dihydrate, disodium hydrogen phosphate dihydrate and benzoic anhydride modified polyoxyethylated castor oil according to prescription amounts for later use; (2) preparing a solution: weighing water for injection, adding xylitol, sodium dihydrogen phosphate dihydrate and disodium hydrogen phosphate dihydrate according to the prescription dosage in a stirring state, stirring and dissolving, then adding benzoic anhydride modified polyoxyethylated castor oil and bumetanib according to the prescription dosage, and stirring until the materials are completely dissolved; and (3) fixing the volume: supplementing the water for injection to the total amount of the prescription, and uniformly stirring and mixing. According to the bumetanib injection disclosed by the invention, the polyoxyethylated castor oil is modified by benzoic anhydride, so that the dissolution rate of bumetanib is effectively improved, and meanwhile, the high-temperature and illumination stability of the bumetanib injection is remarkably enhanced.

The invention discloses a method for synthesizing a 1, 4-dicarbonyl compound by utilizing visible light to induce a benzoic anhydride compound, which comprises the following steps: by taking the benzoic anhydride compound and methyl acrylate as reaction substrates and a benzothiazoline compound as a light reducing agent, carrying out a reaction on the benzoic anhydride compound and the methyl acrylate in the presence of organic alkali, and carrying out a reaction to obtain the 1, 4-dicarbonyl compound. The benzoic anhydride compound and the benzothiazoline compound form a donor-acceptor compound through intermolecular interaction, and the donor-acceptor compound is excited by visible light to initiate a single electron transfer process, so that the generation of an acyl radical intermediate is effectively induced. The intermediate and methyl acrylate are subjected to a free radical beta-position addition reaction, and finally the target product 1, 4-dicarbonyl compound is synthesized. The method has the advantages of being green, safe and easy to operate, the reaction condition is mild and efficient, the reaction time is short, the atom economy is high, the target product yield is high, the substrate applicability is wide, and the wide application prospect is achieved.

The invention aims to use acetic anhydride and benzoic anhydride to perform esterification modification on cassava starch to prepare double esterified starch (DES) so as to improve the compatibility of polylactic acid (PLA) and esterified starch. The biodegradable double esterified starch / PLA film is prepared by adopting a solution casting method, and the structure, morphology, air permeability, mechanical properties and biodegradability of the biodegradable double esterified starch / PLA film are researched. Compared with a pure PLA film, the 50 / 50 composite film has the advantages that the water vapor transmission rate is reduced by 50%, the tensile strength is 3.8 MPa, the elongation at break is improved by 74%, and the composite film has a better composite effect, however, when the addition amount of the double esterified starch is 75%, the composite film still has better mechanical properties (the tensile strength is 2.1 MPa, and the elongation at break is 125%). The composite film also has good transparency and degradation performance, and the degradation rate is 28% after the composite film is buried in soil for one week. The research provides an effective method for preparing the starch / polylactic acid composite film, the raw material cost of a single PLA film is reduced, and the starch / polylactic acid composite film is a promising biological composite material.

The application discloses a preparation method of a two-dimensional covalent organic framework solid solution and application thereof, and the preparation method comprises the following steps: mixing 2,6-dimethylbenzo[1,2-b:5,4-b']dioxazole, trimesic aldehyde, 1,3,5-tri(4-formylphenyl)benzene and benzoic anhydride, and heating and reacting under vacuum condition to obtain a series of ethenyl-linked covalent organic framework solid solutions. The covalent organic framework solid solution material prepared by the method has a full conjugated structure and high crystallinity, and has good photocatalytic water splitting hydrogen production activity after ball milling treatment.

The invention belongs to the field of polymer preparations, and particularly relates to a benzoic anhydride grafted nylon composite material as well as a preparation method and application thereof, and the benzoic anhydride grafted nylon composite material comprises the following components in parts by mass: 92-97 parts of nylon matrix resin, 3-8 parts of benzoic anhydride, 0.1-0.5 part of an initiator and an auxiliary agent. According to the embodiment of the invention, benzoic anhydride reacts with amino at the tail end of nylon through an anhydride group to form a stable covalent bond, so that the binding force is enhanced; the macromolecular size and the benzene ring structure can improve the strength and the heat resistance of the material, and the pi-pi conjugation effect can induce ordered arrangement of molecular chains, so that the barrier property and the size stability are improved.

The invention provides a benzodiimidazole bonded covalent organic framework material as well as a preparation method and application thereof. The covalent organic framework material is obtained by carrying out solid-phase condensation cyclization reaction on an organic carboxylic acid ligand and a tetraaminobenzene ligand compound in a benzoic anhydride medium, the method comprises the following steps: taking an organic carboxylic acid ligand, an amino compound and a solid-phase reaction medium, and carrying out a heating reaction to obtain a covalent organic framework material crude product taking benzo-diimidazole as a connecting bond; and carrying out suction filtration on the covalent organic framework material crude product, collecting precipitate, washing and drying to obtain the covalent organic framework material. The covalent organic framework material provided by the invention is used as a catalyst to be applied to a reaction for catalyzing a reaction of carbon dioxide and an epoxy compound to prepare cyclic carbonate. The covalent organic framework material disclosed by the invention has the characteristics that the amount of used reaction medium is obviously reduced, the reaction efficiency is high and the waste liquid amount is greatly reduced, and has relatively high catalytic activity when being used as a catalyst for cyclic carbonate synthesis.

The invention discloses an organic-inorganic hybrid early-strength polycarboxylate superplasticizer and a preparation method thereof, and the organic-inorganic hybrid early-strength polycarboxylate superplasticizer comprises the following components: a modified polyether monomer, methyl allyl polyoxyethylene ether, deionized water, a hydrogen peroxide solution, acrylic acid, a reducing agent, a chain transfer agent, a sodium hydroxide solution, modified graphene oxide, modified cellulose and modified fly ash, the invention relates to the technical field of polycarboxylate superplasticizers. Methyl allyl polyoxyethylene ether is modified through benzoic anhydride, so that the adsorption capacity of methyl allyl polyoxyethylene ether on the surfaces of cement particles is enhanced, and compared with unmodified methyl allyl polyoxyethylene ether, modified molecules can be more effectively combined with active sites on the surfaces of the cement particles through new functional groups of the modified molecules, so that the adsorption capacity of the modified molecules on the surfaces of the cement particles is improved. Therefore, a more stable adsorption layer is formed, the polycarboxylic acid water reducer can play a better dispersion role, and cement particles can be kept in a better dispersion state.

The invention relates to the technical field of medicines, in particular to a chiral purification process of a loratinib intermediate, which comprises the following steps: S1, carboxyl esterification: adding 4-fluoro-2-(1-ethoxyl)-N, N-bis (1-methylethyl) benzamide into a catalytic mixed solution, controlling the temperature to 25-40 DEG C, adding benzoic anhydride to react for 5-7 hours, detecting the reaction of raw materials by central control TLC (Thin Layer Chromatography), filtering, washing, and drying to obtain the loratinib intermediate. Cooling, performing suction filtration, leaching and drying to obtain a compound III; s2, enzyme catalysis: adding the obtained compound III into an organic solvent, in a nitrogen atmosphere, controlling the temperature at 35-40 DEG C, adding lipase, stirring and reacting until the system does not release heat any more, continuously stirring for 1-2 hours, cooling to room temperature, adsorbing and filtering the obtained reaction liquid, adjusting the pH value to 8-10, extracting and separating liquid, washing, and performing rotary evaporation to obtain a crude product, and purifying through an enzymatic solution to obtain a compound IV; s3, hydrolysis and purification: adding the compound IV into an alcoholic solution, mixing, dropwise adding alkali liquor, stirring and reacting for 1-2 hours at room temperature, tracking the reaction by TLC, adding a saturated sodium bicarbonate solution, extracting, washing, drying, filtering and carrying out rotary evaporation to obtain the 4-fluoro-2-[(1S)-1-ethoxyl]-N, N-bis (1-methylethyl) benzamide. The chiral purification method of the loratinib intermediate is mild in reaction condition, low in cost, high in catalytic efficiency, good in stereoselectivity, simple and convenient in post-treatment operation, easy to industrially catalyze a chiral compound resolution means and capable of being used for industrial production.

The application relates to the technical field of building materials, and discloses an anti-permeation concrete additive, raw materials of which comprise the following components in parts by weight: limestone powder 40-50 parts, sodium silicate 30-40 parts, hexadecyl trimethoxysilane 20-30 parts, silicon dioxide 10-20 parts, and water blocking agent 5-10 parts, wherein the water blocking agent is formed by mixing benzoic anhydride and barium oxide. The anti-permeation concrete additive solves the problem that the anti-permeation concrete additive in the prior art cannot obviously improve the anti-permeation capacity of concrete.

The invention relates to the technical field of cables, and discloses an anti-aging and flame-retardant composite material and a preparation process thereof.The anti-aging and flame-retardant composite material is obtained by mixing and reacting all the components by weight to obtain a primary material, melting, pouring, taking out, cooling, and cutting, grinding and polishing the primary material by a cutting machine. The compatilizer benzoic anhydride grafted polystyrene enhances the compatibility and interaction force among the organic weight components, the composite flame retardant forms a compact protective layer on the surface of a combustible material by inhibiting chain reaction, the nano metal oxide and the rare earth prevent the cable from being oxidized, and the cable has excellent mechanical properties and can be widely applied to the field of cable materials. The obtained anti-aging flame-retardant composite material has the advantages of high temperature resistance, aging resistance and crack resistance.

The application discloses sulfonate surfactant for improving pesticide adhesion and application thereof, and belongs to the technical field of surfactants. Modified sodium lignosulfonate is obtained by esterification of sodium lignosulfonate with benzoic anhydride. The esterification reaction reduces the hydrophilicity of the sodium lignosulfonate and improves the hydrophobicity. Then, the surface of the sodium lignosulfonate is coated with titanium dioxide through hydrophobic self-assembly and hydrothermal treatment, so that a porous and rough structure is obtained. The rough structure can improve the anchoring capacity on the leaf surface, and the porous structure can disperse the shear force of rainwater washing and avoid the rainwater washing from falling off the leaf surface. The sulfonic acid group can increase photo-generated carriers, improve the separation efficiency of photo-generated electrons and holes, improve the absorption rate of titanium dioxide to ultraviolet light, and effectively adsorb and combine water molecules due to the strong polarity of the sulfonic acid group, so that in-situ hydrolysis of tetrabutyl titanate on the surface of the porous sodium lignosulfonate nanosphere is promoted, and a titanium dioxide coating layer is formed through condensation.

A method for manufacturing a low-viscosity hardener is provided. The method includes the followings steps: providing a hardener crude product; and subjecting the hardener crude product and an alkaline catalyst to an isomerization reaction, so as to obtain the low-viscosity hardener. The hardener crude product contains 3-methyltetrahydrophthalic anhydride and 4-methyltetrahydrophthalic anhydride, and a weight ratio of the 3-methyltetrahydrophthalic anhydride to the 4-methyltetrahydrophthalic anhydride ranges from 7:3 to 3:7. A viscosity of the low-viscosity hardener ranges from 30 cps to 50 cps.

To provide a polyimide film with excellent retardation (Rth) and laser peelability, and a resin composition for forming the same. [Solution] A resin composition comprising a resin of a structural unit represented by general formula (9), wherein P4 comprises a structural unit derived from 4,4'-(hexafluoroisopropylidene)diphthalic anhydride (6FDA) and 9,9-bis(3,4-dicarboxyphenyl)fluorene dianhydride (BPAF), P3 represents a divalent organic group, and p represents a positive integer. TIFF2026123092000102.tif34151

The invention discloses a sulfonate surfactant for improving pesticide adhesion and application thereof, and belongs to the technical field of surfactants, sodium lignin sulfonate is esterified through benzoic anhydride to obtain modified sodium lignin sulfonate, the hydrophilicity of the sodium lignin sulfonate is reduced through esterification reaction, the hydrophobicity is improved, and the pesticide adhesion is improved. Then titanium dioxide is coated on the surface through a hydrophobic self-assembly effect and hydrothermal treatment to obtain a porous and coarse structure, the coarse structure can improve the anchoring capability on the leaf surface, and the porous structure can disperse the shear force of rain wash to prevent the shear force applied to the leaf surface from falling off by rain wash; the sulfonic acid group can increase photon-generated carriers, improve the separation efficiency of photo-generated electrons and holes and improve the absorption rate of titanium dioxide to ultraviolet light, and the strong polarity of the sulfonic acid group can effectively adsorb and combine water molecules, so that in-situ hydrolysis of tetrabutyl titanate on the surface of the porous sodium lignin sulfonate nanosphere is promoted, and the photocatalytic activity of the porous sodium lignin sulfonate nanosphere is improved. And condensing to form a titanium dioxide coating layer.

The invention relates to the technical field of photoetching, and provides an anti-reflection coating and a preparation method thereof. The anti-reflection coating comprises the following components in parts by weight: 25 parts of matting resin, 4-9 parts of phenol type novolac epoxy resin, 2-5 parts of a catalyst, 6-10 parts of a cross-linking agent, 2-6 parts of a benzoic anhydride-containing compound, 1-2 parts of a photo-acid generator and 600-1200 parts of a solvent, the phenol type novolac epoxy resin comprises phenol type novolac epoxy resin NPPN-631 and phenol type novolac epoxy resin F-44 in a weight ratio of (1-5): 1. According to the technical scheme, the problem that the solvent resistance of a coating formed by an anti-reflection coating in the prior art is poor is solved.

The invention discloses a preparation method and application of a two-dimensional covalent organic framework solid solution, and the preparation method comprises the following steps: mixing 2, 6-dimethylbenzo [1, 2-b: 5, 4-b '] dioxazole, benzenetricarboxaldehyde, 1, 3, 5-tris (4-formylphenyl) benzene and benzoic anhydride, and carrying out heating reaction under a vacuum condition to obtain a series of vinyl-linked covalent organic framework solid solutions. The covalent organic framework solid solution material prepared by the method disclosed by the invention has a full-conjugate structure and high crystallinity, and has good photocatalytic water decomposition hydrogen production activity after ball-milling treatment.

To stably reduce the viscosity of a raw material mixed liquid for an epoxy resin used for an electric apparatus in an insulating resin material.SOLUTION: The acid anhydride of the curing agent liquid contains hexahydrophthalic anhydride and 4-methylhexahydrophthalic anhydride, and the weight ratio of 4-methylhexahydrophthalic anhydride is equal to or more than that of hexahydrophthalic anhydride.SELECTED DRAWING: Figure 1

The application belongs to the technical field of polymer materials, and particularly relates to a PP-R cold and hot water pipe and a preparation method thereof. The PP-R cold and hot water pipe provided by the application comprises PP-R resin, composite nucleating agent, impact agent, filler, gamma-aminopropyl triethoxysilane, polyvinyl alcohol, antioxidant and color masterbatch. The reaction product of benzoic anhydride and p-phenylenediamine is reacted with cerium nitrate to generate a diamide carboxylate, which is compounded with calcium pimelate to form a beta nucleating agent, so that the low-temperature plasticity of the PP-R cold and hot water pipe is improved. The low-impact polypropylene is used to wrap modified nano zeolite powder as the impact agent, so that the impact resistance and high-temperature performance of the PP-R cold and hot water pipe are improved. The cooling rate of the PP-R cold and hot water pipe after extrusion molding is controlled, and heat preservation treatment is performed, so that the internal stress of the PP-R cold and hot water pipe is effectively eliminated, and the beta crystal content and crystallization ability are improved. The carbon nanofiber and nano silicon dioxide are selected to jointly form the filler, so that the mechanical properties of the PP-R cold and hot water pipe are improved.

The invention discloses an oxygen reduction reaction catalyst with an axial nitrogen coordination iron monatomic structure and a low-temperature preparation method thereof.The low-temperature preparation method comprises the steps that benzoic anhydride derivatives, iron salt, other non-iron metal salts, a nitrogen source, a carbon source and ammonium salt are added into a mortar and ground and mixed uniformly, and a precursor is obtained; putting the obtained precursor into a muffle furnace, carrying out heat treatment at 140-250 DEG C for 0.5-3 hours, and taking out and cooling after the heat treatment is finished; grinding into powder, washing the powder, and drying in vacuum to obtain the oxygen reduction reaction catalyst with the axial nitrogen coordination iron monatomic structure. The catalyst has excellent ORR performance in an alkaline medium, and the catalytic activity of the catalyst is superior to that of a commercial Pt / C catalyst; and the catalyst has good stability, and is suitable for being used as a catalyst in proton exchange membrane fuel cells and metal-air cells. The catalyst disclosed by the invention is prepared by adopting a low-temperature solid-phase synthesis method, reaction in a protective atmosphere is not needed, and high-temperature heat treatment is also not needed, so that the preparation method is simple, and the energy consumption is remarkably reduced.

The invention provides a synthesis method of tert-butyl peroxybenzoate, and belongs to the technical field of chemical synthesis. The synthesis method of tert-butyl peroxybenzoate provided by the invention comprises the following steps: S1, a tert-butyl hydroperoxide aqueous solution, a catalyst and an active agent are mixed and stirred for a reaction, the catalyst is quaternary ammonium salt or crown ether, and the active agent is a nitrogen-containing heterocyclic compound or triethylamine; s2, cooling a reaction system after the reaction in the step S1, then respectively dropwise adding an organic solvent solution of benzoic anhydride and a sodium hydroxide aqueous solution into the cooled reaction system, and mixing and reacting to obtain a reaction solution; and S3, carrying out filtration, water washing, liquid separation and reduced pressure distillation on the reaction liquid in the step S2 to obtain tert-butyl peroxybenzoate. The synthesis method provided by the invention improves the purity and yield of the tert-butyl peroxybenzoate product.

The invention discloses a method for preparing a cellulose ester optical material, comprising the following steps: (1) dissolving cellulose, and then reacting the cellulose with a selective group protecting agent to obtain a first intermediate product; (2) dissolving the first intermediate product, and acylating the first intermediate product with a first acylating agent to obtain a second intermediate product; (3) catalytically removing the protecting group from the second intermediate product to obtain a third intermediate product; (4) acylating the third intermediate product with a second acylating agent to obtain a final product; the first acylating agent is propionic anhydride, and the second acylating agent is acetic anhydride; or the first acylating agent is butyric anhydride, and the second acylating agent is acetic anhydride; or the first acylating agent is benzoic anhydride, and the second acylating agent is propionic anhydride; or the first acylating agent is benzoic anhydride, and the second acylating agent is butyric anhydride. The invention realizes the regioselective controlled synthesis of cellulose dibasic ester, and reduces the birefringence of the cellulose ester optical film by combining different ester groups and substitution positions.