470 results about "Carboxylic ester" patented technology

The invention discloses an embolism microsphere and a preparation method thereof.The embolism microsphere is prepared through the following steps that a polycarboxylate microsphere is prepared by combining a free radical polymerization method and an emulsion polymerization method, and the polycarboxylate microsphere is obtained; and saponifying and hydrolyzing the polycarboxylate microspheres to hydrolyze the polycarboxylate microspheres to obtain hydroxyl polymer microspheres, and introducing an acidic group onto the hydroxyl polymer microspheres to obtain the embolism microspheres containing both the hydroxyl group and the acidic group. The embolism microsphere disclosed by the invention realizes high loading capacity and controllable release of the anti-tumor drug, realizes accurate embolism in blood flow, and improves the treatment effect of the drug.

Described herein is the farnesoid X receptor agonist, 4-((4-(1-(tert-butyl)-1H-pyrazol-4-yl)pyridin-2-yl)((4-(4-methoxy-3-methylphenyl)bicyclo[2.2.2]octan-1-yl)methyl)carbamoyl)cyclohexyl 3-hydroxyazetidine-trans-1-carboxylate, including crystalline forms and pharmaceutically acceptable salts, solvates, and formulations thereof.

Provided are a battery cell, a battery device, and an electric device. The battery cell comprises a positive electrode sheet and an electrolyte; the positive electrode sheet comprises a positive electrode current collector and a positive electrode active layer located on at least one surface of the positive electrode current collector; the positive electrode active layer comprises a positive electrode active material; the positive electrode active material comprises a lithium-containing phosphate; the single-sided surface density of the positive electrode active layer ranges from 230 mg / 1540.25 mm2 to 400 mg / 1540.25 mm2; the electrolyte comprises a solvent and a lithium-containing electrolyte salt; the solvent comprises a chain carboxylic acid ester and ethylene carbonate; the lithium-containing electrolyte salt comprises one or more of lithium hexafluorophosphate and a fluorine-containing sulfonimide salt; the mass ratio of the lithium-containing electrolyte salt to the ethylene carbonate is 0.29-0.72; and the conductivity of the electrolyte ranges from 13 mS / cm to 20 mS / cm.

The invention belongs to the field of photovoltaic technology, and provides a photovoltaic packaging adhesive film, a preparation method and application thereof, and a recovery method of a photovoltaic module. The photovoltaic packaging adhesive film comprises the following raw materials in specific amounts: matrix resin, a low-temperature cross-linking agent, a low-temperature catalyst, a silane coupling agent, an ultraviolet light stabilizer, an organic peroxide initiator, an assistant cross-linking agent and an alcohol compound serving as a reversible dynamic transesterification reaction group, the matrix resin is EVA (ethylene vinyl acetate), POE (polyolefin elastomer) and / or ethylene-butylene copolymer; the low-temperature cross-linking agent is a carboxylic ester type cross-linking agent, a bisoxazoline type cross-linking agent and / or a metal-organic ligand cross-linking agent with the reaction temperature of 150 DEG C or below; the low-temperature catalyst is a polynuclear metal catalyst, a solid acid resin catalyst, a solid base catalyst and / or a bimetallic MOF derivative catalyst with the reaction temperature of 150 DEG C or below. The adhesive film can realize recycling of the adhesive film and a photovoltaic module in a more efficient and energy-saving manner, is wide in adaptability, and has high crosslinking degree, peel strength and PID resistance.

An alkene-containing carboxylic ester compound of formula (I) and its agriculturally acceptable salt can be used as a herbicide.

The invention is directed to a process for the preparation of an aromatic acid or a phenolic compound, said process comprising reacting a dienophile and a furanic compound comprising an acetal moiety in a Diels-Alders reaction to obtain an aromatic compound comprising said acetal moiety, followed by hydrolysis and oxidation of said acetal moiety into a hydroxide or carboxylate moiety to form the aromatic acid or phenolic compound, wherein said dienophile is selected from the group consisting of alkylenes, acetylenes, acrylates, maleates, fumarates, maleimides, propiolates, acetylene dicarboxylates, and benzynes and wherein said acetal moiety is bound directly to the 2-position of the furanic compound.

This invention relates to the field of organic synthesis technology and discloses a method for preparing 3,4-epoxycyclohexylmethyl-3,4-epoxycyclohexylcarboxylic acid ester, comprising the steps of: S1, providing raw material: 3-cyclohexenecarboxylic acid-3′-cyclohexene methyl ester; S2, epoxidation reaction: mixing the raw material with hydrogen peroxide, a composite catalyst, and a buffer to obtain a reaction solution containing the target product; S3, separation and purification: allowing the reaction solution to stand and separate into layers, separating the organic phase, washing with water, drying, and vacuum distilling to obtain 3,4-epoxycyclohexylmethyl-3,4-epoxycyclohexylcarboxylic acid ester. This method for preparing 3,4-epoxycyclohexylmethyl-3,4-epoxycyclohexylcarboxylic acid ester uses hydrogen peroxide as the oxygen source, resulting in no heavy metal pollution, low wastewater volume, and conforming to the trend of green chemistry. The composite catalyst requires a small amount, has high activity and good selectivity, can be recycled ≥5 times, reducing costs, requiring less equipment, and is highly safe. The product is colorless and transparent, with a high epoxy value, purity ≥98.5%, low acid value, and good stability.

The present invention relates to a novel polymorph of (1R,2R,3aS,3bR,10aS,10bR,11S,12aS)-5,10b-difluoro-1-(((fluoromethyl)thio)carbonyl)-11-hydroxyl-2,10a,12a-trimethyl-7-phenyl-1,2,3,3a,3b,7,10,10a,10b,11,12,12a-dodecylhydrocyclapenta[5,6]napththo[1,2-F]indazole-1-furan-2-carboxylate ester as shown in formula (I), a preparation method therefor, and a use thereof. The crystal form of the present invention has characteristics such as a significant pharmaceutical effect, good stability, high yield, and high purity, and is beneficial for the selection and design of a drug administration route and the determination of a drug preparation process parameter, thereby improving drug production quality.

The invention discloses a fast-charging electrolyte with wide temperature range and high voltage and application thereof.The electrolyte comprises a cosolvent, a solute and a film-forming additive, the cosolvent comprises a fluoro-carboxylic ester compound and a nitrile compound, the fluoro-carboxylic ester compound and the nitrile compound both have wide liquid range and strong oxidation resistance, and the solute and the film-forming additive form a film. And a foundation is laid for wide-temperature and high-voltage application of the electrolyte. The fluorocarboxylate compound enables the electrolyte to have obvious weak solvation characteristics, and promotes rapid desolvation of lithium ions at low temperature and high rate; the nitrile compound has a high dielectric constant, so that the conductivity of the electrolyte is improved. And the two can exert respective advantages and show a synergistic effect, so that the multiplying power and the cycle performance of the lithium ion battery under wide temperature range and high voltage are greatly improved.

A wavelength selective absorption filter contains a resin, a coloring agent, and a compound having at least one polar group of a carboxylic acid ester bond, a carboxylic acid amide bond, a sulfonic acid amide bond, a urethane bond, or a sulfonyl bond and a MW≤1,000 where dye includes at least one of dye A having a main absorption wavelength range at a wavelength of 390 to 440 nm and dye D having a main absorption wavelength range at a wavelength of 680 to 780 nm, a 20% value wavelength A with respect to an absorbance maximal value exhibited by a main absorption wavelength is 455 nm or less where dye A is contained, and a 20% value wavelength D with respect to the absorbance maximal value exhibited by the main absorption wavelength is 640 nm or more where dye D is contained, and a display device.

To provide a heat dissipation sheet that has low hardness and excellent heat resistance. [Solution] A heat dissipation sheet comprising polyurethane, a thermally conductive filler, and a carboxylic acid ester, wherein the content of polyurethane relative to the total mass of the heat dissipation sheet is greater than the content of carboxylic acid ester relative to the total mass of the heat dissipation sheet, and the content of thermally conductive filler is greater than 50% by volume relative to the total volume of the heat dissipation sheet.

A battery cell, a battery device, and an electric device. The battery cell comprises an electrode assembly and an electrolyte. The electrode assembly comprises a first electrode sheet and a second electrode sheet. The first electrode sheet and the second electrode sheet each comprise a coating portion and tabs. The coating portion is coated with an active material layer, and the tabs are not coated with the active material layer. One of the first electrode sheet and the second electrode sheet is a positive electrode sheet, and a positive electrode active material of the positive electrode sheet comprises lithium-containing phosphate having an olivine structure. The coating portion of the first electrode sheet comprises first straight sections, and the coating portion of the second electrode sheet comprises second straight sections. The first straight sections and the second straight sections are stacked in the thickness direction of the electrode assembly. The ratio of the number of the tabs of the first electrode sheet to the number of the first straight sections of the first electrode sheet is 0.5 to 2. An organic solvent of the electrolyte comprises a linear carboxylic ester solvent. The mass content of the linear carboxylic ester solvent in the organic solvent is 8% to 90%. The present application can improve the use reliability and cycle performance of battery cells.

The invention belongs to the technical field of carboxylic ester preparation, and particularly relates to a preparation method of dioctyl terephthalate, which comprises the following steps: under the catalysis of acid, modifying mesoporous silica by using OTES and a carbazole silane solution to obtain modified silica; under the protection of inert atmosphere, uniformly mixing TBT and methylbenzene, adding absolute ethyl alcohol for reaction, adding modified silicon dioxide for dispersion, adding water-containing mixed liquid for reaction, and aging, filtering, washing and drying to obtain the titanium-based catalyst. The preparation method comprises the following steps: uniformly mixing PTA, 2-ethylhexanol and a titanium-based catalyst, carrying out heating reaction, filtering, and carrying out reduced pressure distillation to obtain the dioctyl terephthalate. The method can inhibit hydrolysis failure of a titanium active center in the catalytic esterification reaction process, and improves the yield and purity of dioctyl terephthalate.

The invention provides an electrolyte and a lithium ion battery, and particularly relates to the technical field of batteries. The electrolyte comprises an organic solvent, a lithium salt and an additive, the organic solvent comprises carboxylic ester, fluoroethylene carbonate and a solvent as shown in a formula I, the additive comprises a first additive, the structural formula of the first additive is as shown in a formula II, and the mass fraction of fluoroethylene carbonate in the electrolyte is 2-20%; the mass fraction of the solvent as shown in the formula I in the electrolyte is 4%-32%; and the mass fraction B of the first additive in the electrolyte is 0.1%-1.5%. The solvent shown in the formula I and the first additive shown in the formula II are synergistically combined for use, and a unique polyfluoropolymer solid electrolyte interface film can be constructed on the surface of the negative electrode, so that the high-temperature performance of the battery is remarkably improved on the basis of retaining the fast charging advantage of carboxylic ester.

The invention belongs to the technical field of chemical synthesis, and particularly relates to a synthesis method of 1-(tert-butyl)-3-ethyl-4-(4, 4, 5, 5-tetramethyl-1, 3, 2-dioxaborane-2-yl)-5, 6-dihydropyridine-1, 3 (2H)-dicarboxylate. According to the invention, 1-(tert-butyl)-3-ethyl-4-oxopiperidine-1, 3-diformate, namely the compound A, is taken as a base material, two-step reaction is carried out, the reaction conditions are relatively mild, the product yield is high, and the operation is easy.

The invention relates to the technical field of perfluoro fine chemical engineering, in particular to a method for preparing a perfluoro organic carboxylic acid compound from perfluoro organic carboxylic ester, and particularly relates to a method for preparing a reactive perfluoro organic carboxylic acid compound from perfluoro organic carboxylic ester. The method comprises the following steps: carrying out hydrolysis reaction on perfluorinated organic carboxylate and an alkaline aqueous solution to generate a perfluorinated organic carboxylate solution, drying the generated perfluorinated organic carboxylate solution, preparing a perfluorinated organic carboxylate aqueous solution again, and carrying out ion exchange with hydrogen-type cation exchange resin to convert the perfluorinated organic carboxylate aqueous solution into a perfluorinated organic carboxylic acid aqueous solution. And performing post-treatment on the perfluorinated organic carboxylic acid aqueous solution to obtain the perfluorinated organic carboxylic acid compound. The preparation process of the method does not involve organic solvents such as sulfuric acid, hydrochloric acid and other acidic solutions, and the method has the advantages of simple operation, stable process, high product purity, safety, short reaction time, high yield and the like.

An electrolyte for a battery cell, a battery cell for a vehicle and a method of forming a battery cell. The electrolyte includes a combination of lithium ion salts including lithium hexafluorophosphate (LiPF6), lithium bis(fluorosulfonyl)imide, and lithium difluoro(oxalato)borate. The electrolyte also includes a carbonate solvent including fluoroethylene carbonate, ethyl methyl carbonate, and a carboxylic acid ester exhibiting the following formula:wherein R1 and R2 are individually an unsubstituted alkyl group including in the range of 1 carbon to 2 carbons, wherein the combination of lithium ion salts is dispersed in the carbonate solvent. The electrolyte further includes vinylene carbonate. The electrolyte does not include ethyl carbonate.

A battery cell, a battery apparatus, and an electric device, relating to the technical field of batteries. The battery cell comprises: a positive electrode sheet, comprising a positive electrode current collector and a positive electrode film layer provided on at least one side of the positive electrode current collector, wherein the positive electrode film layer comprises a lithium-containing phosphate, a first additive, and a second additive, the first additive comprises a lithium-containing transition metal oxide, and the second additive comprises a nickel-containing metal oxide; a negative electrode sheet, comprising a negative electrode current collector and a negative electrode film layer provided on at least one side of the negative electrode current collector, wherein the negative electrode film layer comprises graphite; and an electrolyte, comprising a chain carboxylic acid ester solvent, wherein the mass content of the chain carboxylic acid ester solvent is 32%-60% on the basis of the total mass of the electrolyte. The technical solution of the present application can reduce the gas production of the battery cell so as to improve the cycle performance of the battery cell, and the battery cell also has good fast charge performance.

This invention relates to a method for preparing the fenelone intermediate 2-cyanoethyl(4S)-4-(4-cyano-2-methoxyphenyl)-5-ethoxy-2,8-dimethyl-1,4-dihydro-1,6-naphthidine-3-carboxylic acid ester, and also relates to diastereomeric salts (Va), (Vb), (Vc), and / or (Vd). This method is simple to operate, and the diastereomeric salts can be obtained with very high chemical and enantiomeric purity (tartrate ester content <0.05%) through a single dissociation, avoiding the raw material loss and waste problems caused by multiple dissociations. It also has low production costs and meets the requirements of green production.

This invention provides a non-aqueous electrolyte and a lithium-ion battery. The non-aqueous electrolyte comprises a non-aqueous organic solvent, an electrolyte salt, and additives. The additives include compound A (structural formula I) and compound B (structural formula II). In the non-aqueous electrolyte of this invention, compound A is an unsaturated phosphorus-containing compound, and compound B is a carboxylic acid ester compound. Through the synergistic effect of the unsaturated phosphorus-containing compound and the carboxylic acid ester compound, a relatively complete SEI (Sediment Injection) membrane can be formed, providing a stable transport channel for lithium ions during cycling and storage. Furthermore, since the carboxylic acid ester may occupy positions in the SEI membrane, it prevents the phosphorus-containing compound from forming an excessively thick SEI membrane, thus ensuring a uniform SEI membrane thickness and shortening the lithium-ion transport distance. Therefore, through these two effects, the high-temperature storage, cycling, and low-temperature performance of the high-nickel ternary cathode material system battery under high voltage (≥4.35V) can be improved.

The invention discloses a battery monomer, an electrolyte, a battery device and a power utilization device. The electrolyte comprises a lithium salt, a solvent and a sulfur-containing additive; the mass ratio of the solvent is 65wt%-85wt%, the mass ratio of the lithium salt is 8wt%-15wt%, and the mass ratio of the sulfur-containing additive is 0.1 wt%-5wt%; wherein the solvent comprises cyclic carbonate with the mass content of 20 wt%-35 wt% and linear carboxylic ester with the mass content of 60 wt%-80 wt%; the lithium salt comprises a first lithium salt and a second lithium salt in a mass ratio of (1: 10)-(4: 1); the length of the battery monomer is 200-1600 mm, the width of the battery monomer is 80-500 mm, the thickness of the battery monomer is 10-100 mm, and the length-to-thickness ratio of the battery monomer is 5-150. According to the embodiment of the invention, the high-rate charge-discharge performance and the cycle life of the single battery can be considered.

A battery cell comprising a positive electrode plate, a negative electrode plate, and an electrolyte solution, wherein the electrolyte solution contains a solvent comprising a chain-like carboxylic acid ester solvent, wherein the conductivity of the electrolyte solution is 13 mS / cm to 20 mS / cm, wherein the negative electrode plate comprises a negative current collector and a negative membrane layer arranged on at least one side of the negative current collector, wherein the negative membrane layer comprises a negative electrode material which exhibits a characteristic peak of the phosphorus element 2p with a binding energy between 132 eV and 138 eV in an X-ray photoelectron spectrum (XPS).

The invention relates to the technical field of batteries, in particular to a battery. Comprising a positive plate and electrolyte, the positive plate comprises a positive current collector and a positive coating, the positive coating on the first surface is provided with a plurality of concave parts, and the positive coating on the second surface is provided with a plurality of convex parts; the positive electrode coating comprises a ternary material; the electrolyte comprises lithium bis (fluorosulfonyl) imide and lithium hexafluorophosphate, and the mass content of the lithium bis (fluorosulfonyl) imide in the electrolyte is greater than that of the lithium hexafluorophosphate; the electrolyte further comprises 1, 3, 6-hexane trinitrile and lithium difluorophosphate, the mass content C3 of the 1, 3, 6-hexane trinitrile in the electrolyte is larger than or equal to the mass content C4 of the lithium difluorophosphate, and the sum of C3 and C4 is larger than or equal to 0.2% and smaller than or equal to 5%. The electrolyte further comprises fluoro-carboxylic ester, and the mass content C5 of the fluoro-carboxylic ester in the electrolyte is 20%-80%. The battery provided by the invention can effectively improve the problem of folding of the pole piece, and has excellent cycle life and high-temperature safety performance.

The application provides a secondary battery and a power utilization device, wherein the secondary battery comprises an electrode assembly and an electrolyte, the electrode assembly comprises a positive electrode sheet, a negative electrode sheet and a separator, the positive electrode sheet comprises a positive electrode active material layer, the positive electrode active material layer comprises a positive electrode active material, the negative electrode sheet comprises a negative electrode active material layer, and the negative electrode active material layer comprises a negative electrode active material; the coating weight of the positive electrode active material layer is W z , the coating weight of the negative electrode active material layer is W f , W z and W f satisfy the following conditions: 1.6W f ≤W z ≤2.2W f , 3.25 mg / cm 2 ≤W f ≤5.84 mg / cm 2 ; the Dv99 of the positive electrode active material is 27 μm to 33 μm, and the Dv99 of the negative electrode active material is 23 μm to 28 μm; the electrolyte comprises an organic solvent, a lithium salt and a nitrile additive, the organic solvent comprises a chain carboxylic acid ester, the mass percentage of the chain carboxylic acid ester is 6% to 56% based on the mass of the electrolyte, and the mass percentage of the nitrile additive is 0.01% to 10%. The secondary battery has good cycle kinetics and high-temperature stability.

The present application relates to the technical field of concrete admixtures, and particularly relates to a polycarboxylic high-performance water-reducing agent for wind power tower cylinder segments and a preparation method thereof. The water-reducing agent is polymerized from an unsaturated macromonomer, an unsaturated carboxylic acid and / or an unsaturated carboxylic anhydride, and a foam control function monomer under the action of an initiator and a molecular weight regulator; the foam control function monomer is an unsaturated carboxylic ester silicone oil. The unsaturated carboxylic ester silicone oil is chemically bonded to the polycarboxylic molecular main chain, providing steric hindrance to enhance the water-reducing effect in the initial stage of concrete, and the low-molecular-weight side chain in the molecular structure improves the viscosity reduction performance. In the alkaline hydration process, the ester bond is hydrolyzed to release silicone oil in situ to play a defoaming role, effectively eliminating harmful pores and apparent bubbles in concrete, so that the surface of the wind power tower cylinder segment is smooth and bubble-free after demolding, and the water-reducing agent has the advantages of high water-reducing rate, significant strengthening effect, simple preparation process, and the like, and is particularly suitable for UHPC ultra-high performance concrete segments.

A resin composition, a cured product obtained by curing the composition, a laminate including the cured product, a method for producing the cured product, a method for producing the laminate, a method for producing a semiconductor device including the method for producing the cured product, and a semiconductor device including the cured product, the resin composition containing: a resin A; a polymer having a polymerizable group and having two or more amino groups that may be protected; and a compound B having a molecular weight of 2,000 or less, the compound B having a structure A, which is a structure in which two or more groups selected from a carboxylic acid ester group and an optionally protected carboxyl group are linked by a linking group having a linking chain length of 2-4.

The invention provides an electrolyte and a lithium ion battery. Specifically, the electrolyte comprises carboxylic ester, carbonic ester and a compound as shown in a formula (I), in the formula (I), R1 and R2 are the same or different and are independently selected from H, C1-C4 straight chain or branched chain alkyl; wherein based on the total mass of the electrolyte, the mass fraction A of the carboxylic ester is 4%-60%; the mass fraction B of the compound shown in the formula (I) is 0.1-1%. According to the electrolyte, the viscosity of a solvent of the electrolyte can be effectively reduced by adding the carboxylic ester, and the lithium precipitation problem of the electrolyte under a high-rate charging working condition and the charge-discharge capacity at a low temperature are solved; the addition of the compound as shown in the formula (I) can inhibit the decomposition of carboxylic ester and reduce the side reaction of carboxylic ester on the surface of an electrode, thereby improving the high-temperature performance of the battery.

The application belongs to the technical field of polymer synthesis, and provides a preparation method of a polyimide covalent organic framework.The application mixes anhydride compounds (one or more of the following: pyromellitic dianhydride, 1,4,5,8-naphthalene tetracarboxylic anhydride and 3,4,9,10-perylenetetracarboxylic dianhydride) and an alcohol solvent to perform pre-reaction to obtain a carboxylic esterate solution; disperses amino blocks (tris(4-aminophenyl)amine, 1,3,6,8-tetrakis(4-aminophenyl)pyrene, etc.) to obtain an amino block dispersion solution; mixes the amino block dispersion solution and the carboxylic esterate solution to perform reaction to obtain the polyimide covalent organic framework.The preparation method of the application can be performed under normal pressure, and the operation is safer; meanwhile, the preparation method of the application is not performed in a sealed tube, and can be used for mass production of the polyimide covalent organic framework.

The invention provides a catalyst system for olefin polymerization and a preparation method and application thereof, and the catalyst system for olefin polymerization comprises reaction products of the following components: (A) a titanium-containing solid catalyst component comprising a magnesium halide alcohol adduct carrier, and a supported titanium-containing compound and a composite internal electron donor compound; the composite internal electron donor compound comprises at least one diol ester compound a and at least one other carboxylic ester compound b; (B) an alkyl aluminum compound; and (C) a composite external electron donor compound, wherein the composite external electron donor compound comprises at least one diallyl phthalate compound and at least one alkyl dialkoxy silane compound. The composite external electron donor compound adopted by the invention can further improve the stereospecificity of the catalyst.