891 results about "Dicarboxylic acid" patented technology

The present disclosure relates to novel lamotrigine salts, co-crystals, and compositions. In some embodiments, the lamotrigine salt is a lamotrigine dicarboxylic acid salt or hydrate or solvate thereof. In some embodiments, the lamotrigine co-crystal is a co-crystal of lamotrigine and a dicarboxylic acid, or a hydrate or solvate thereof. In some embodiments, the compositions comprise lamotrigine or a salt or co-crystal thereof, or a hydrate or solvate thereof. In some embodiments, the composition is in the form of a powder. In some embodiments, the composition is in the form of a liquid. The present disclosure also relates to methods of preparation and use in medical therapy, for example, for the treatment of a subject with epilepsy or bipolar disorder.

The invention discloses an electrolytic solution of a platinum-rhodium alloy, a preparation method and a preparation method of a plating layer of the platinum-rhodium alloy, and belongs to the technical field of precise electroplating. The electrolytic solution comprises a platinum salt, a rhodium salt, a first additive, a second additive, a first complexing agent, a second complexing agent, a first stabilizer and a second stabilizer, the first additive is a sulfamic acid compound containing 3-4 hydroxyalkyl groups, the second additive is sulfamic acid salt containing 3-4 hydroxyalkyl groups, and the first complexing agent and the second complexing agent are a platinum salt and a rhodium salt. The first complexing agent is a mixture of dicarboxylic acid and dicarboxylic acid containing amino or hydroxyl, the second complexing agent is a salt corresponding to the dicarboxylic acid, and the first stabilizer is a mixture of alkyl sulfonic acid and alkyl sulfonate. Through the synergistic effect of the additive, the complexing agent and the stabilizer, the additive, the complexing agent and the stabilizer form a five-membered to seven-membered heterocyclic coupling structure with platinum ions and rhodium ions, and the stability of the electrolytic solution is remarkably improved. And the obtained platinum-rhodium alloy coating is compact and uniform, and has excellent nitric acid steam and mixed gas corrosion resistance.

The invention provides a method for preparing polyarylester by interfacial polycondensation, which comprises the following steps: dissolving a diphenol monomer in an alkali solution to prepare a bisphenol salt solution, and dissolving an interfacial catalyst in a bisphenol salt water phase to obtain a water phase; dissolving aromatic dicarboxylic acid acyl chloride in a halogenated hydrocarbon solvent to obtain an organic phase; s2, slowly adding the organic phase obtained in the step S1 into the water phase in a stirring state within 10-60 minutes, and continuously reacting for 10-120 minutes in the stirring state; the product is separated out in the form of precipitate, the precipitated precipitate absorbs the halogenated hydrocarbon solvent, so that a liquid phase main body is water, a solid phase is a muddy product containing the halogenated hydrocarbon solvent, and the obtained muddy product is filtered, washed and dried to obtain a powdery product. According to the method disclosed by the invention, the polymer is directly precipitated by controlling the solute concentration and the mixing ratio, so that the efficient in-situ removal of the solvent is realized, the solvent is directly separated from water through simple filtration, and'zero separation, zero crushing and zero distillation 'is realized.

The application relates to the technical field of silver powder preparation, and discloses a method for producing silver powder by using photovoltaic panel battery pieces, which comprises the following steps: S1, after waste photovoltaic battery pieces and acid liquor are initially mixed, a leaching agent is added for secondary mixing, and filtration is carried out to obtain a silver-containing liquid; S2, sodium chloride is added into the silver-containing liquid to obtain a precipitate; and S3, the precipitate is subjected to reduction treatment to obtain silver powder; and the components of the leaching agent include 8-hydroxyquinoline and / or pyridine-2,6-dicarboxylic acid. Through the technical scheme, the problem of low silver powder yield in the production of silver powder by using photovoltaic battery pieces in the related art is solved.

The synthesis method comprises the following steps: S1, adding furandicarboxylic acid into a reaction container, adding a certain amount of methanol, adding a double-acid-site strong acid solid catalyst, starting stirring, controlling the reaction temperature to carry out esterification reaction, and after the reaction is finished, filtering, washing and drying to obtain furandihydrazide; separating out the double-acid-site strong acid solid catalyst to obtain clear liquid, namely dimethyl furandicarboxylate; s2, transferring dimethyl furandicarboxylate serving as a raw material into another reaction container, adding a certain amount of sodium formate serving as a catalyst, then adding a proper amount of hydrazine hydrate, controlling the reaction temperature, keeping a reflux state, reacting for a period of time, cooling to room temperature after the reaction is finished, and performing centrifugal separation to obtain white solid furandihydrazide. The synthesis method has the advantages of simple reaction steps, no need of toxic and harmful catalysts, mild reaction conditions, high conversion rate and high yield, and can realize efficient, green and low-cost production of furandihydrazide.

The invention discloses a high-CTI (comparative tracking index) halogen-free flame-retardant PA66 (polyamide 66) composite material and a preparation method thereof, and belongs to the technical field of high polymer materials. The composite material comprises the following components in parts by weight: 52-64 parts of PA66 resin, 20-30 parts of glass fibers, 12-15 parts of a phosphorus-based flame retardant, 0.5-1.5 parts of a flame-retardant synergist, 0.3-0.7 part of a lubricant and 0.1-0.5 part of an antioxidant, and the flame-retardant synergist is aliphatic dicarboxylic acid with the carbon atom number greater than or equal to 8. The material surface energy is reduced and electrolyte is repelled through long-carbon-chain hydrophobic groups, and meanwhile, the CTI value is increased to 600 V or above while it is guaranteed that the material reaches the UL94 V0 flame retardant grade (1.6 mm) by utilizing interaction of carboxyl and a PA66 matrix and cooperating with a phosphorus flame retardant. The invention also provides a preparation method of the material, the process is simple, the material is suitable for industrial production, and the product can be widely applied to electronic and electrical components with high safety requirements.

The invention relates to the technical field of metal organic framework materials (MOF) and isotope separation, in particular to a functionalized metal organic framework material for water / heavy water separation and a preparation method and application thereof. The metal organic framework material is a porous crystal material which is formed by coordination self-assembly of metal ions and V-shaped organic ligands and has a periodic network structure; the V-shaped organic ligand is a V-shaped dicarboxylic acid organic ligand modified by an oxygen-containing functional group designed through topological functionalization. According to the metal organic framework material, through topological functional design of a V-shaped organic ligand, a space confinement channel and a high-density oxygen active site are integrated in the same MOF material, and an ideal model system is provided for identification of water isotopes; according to the metal organic framework material, the framework structure flexibility, the pore channel confinement effect and the molecular recognition capability can be synergistically regulated and controlled, so that efficient recognition and separation of water / heavy water are realized.

The invention relates to the technical field of microbial technology and rare earth element recovery. The invention provides bacillus tequilensis Re2, and the preservation number of the bacillus tequilensis Re2 is CGMCC (China General Microbiological Culture Collection Center) No. 36764. The strain Re2 is preserved in the China General Microbiological Culture Collection Center (CGMCC) on November 25, 2025, the center is called CGMCC for short, the address of the center is No.3, No.1 yard, Beichen West Road, Chaoyang District, Beijing, the preservation number of the strain Re2 is CGMCC No.36764, and the strain Re2 is classified and named as Bacillus tequilensis. The bacillus tequilensis provided by the invention can efficiently adsorb various rare earth elements, and the rare earth elements in spores can be eluted after 2, 6-dipicolinic acid (DPA) is added; therefore, the repeated utilization of the strain is realized.

The invention relates to a stimulus-response lasting phosphorescent material based on carboxymethyl chitosan and a preparation method and application thereof, the preparation method comprises the following steps: preparing a mixed solution: mixing purified carboxymethyl chitosan with pyrene-2, 7-dicarboxylic acid mother liquor dissolved by sodium hydroxide, and introducing acid to adjust the pH value to obtain the mixed solution; and preparing an afterglow film material: pouring the obtained mixed solution into a mold, and drying to obtain the stimulus-response-lasting phosphorescent material based on carboxymethyl chitosan. Compared with the prior art, the material disclosed by the invention is diversified in response dimension, wide in color change range, stable in luminescent property at normal temperature, free of inert gas or vacuum protection in a use process, good in actual operability and reusability, and suitable for customized development of personalized anti-counterfeiting ink; the material can also be used as a functional additive to be doped in hydrophilic macromolecules, and is used for intelligent information labels, wearable display fabrics, noctilucent art materials, flexible encryption coatings and other emerging application scenes.

The invention provides isosorbide-based copolyester as well as a preparation method and application thereof, and relates to the technical field of high polymer materials. According to the preparation method, a step-by-step esterification method is adopted, firstly, isosorbide, excessive aromatic dicarboxylic acid and an acylating agent are subjected to a first esterification reaction, so that the acylating agent can efficiently and specifically activate secondary hydroxyl of isosorbide, and the initial esterification rate of isosorbide is greatly increased. Meanwhile, the excessive aromatic dicarboxylic acid ensures that the generated isosorbide prepolymer takes carboxyl as a terminal group, so that isosorbide molecules are'locked 'in the middle of a polymer chain segment. Due to the fact that the isosorbide is embedded in the middle of the chain segment in advance, the problem that the isosorbide falls off in the ester exchange reaction due to the fact that the isosorbide is located at the chain end and low in reaction activity in the subsequent polycondensation stage is effectively solved, and therefore the retention rate of the isosorbide in the final polymer is greatly increased, and the glass-transition temperature of the isosorbide is greatly increased.

The invention belongs to the technical field of digital printing heat transfer printing materials, and particularly relates to a static-free loose-powder DTF transfer printing film and a preparation method thereof. The invention aims to solve the problem of contradiction among antistatic function, ink adsorption and peel strength of the current DTF transfer film. According to the invention, the ionic liquid antistatic agent coated by the polymer microcapsule is dispersed in the water-based resin adhesive to form the lower antistatic network structure layer; meanwhile, the crystallization behavior of the crystalline polyester hot melt adhesive resin taking bio-based 2, 5-furandicarboxylic acid as a rigid component is regulated and controlled through surface modified boron nitride nanosheets, a phase separation curing process is utilized, so that an antistatic network stably exists at the lower part of the coating, and hot melt adhesive resin microcrystals are selectively enriched on the outermost surface of the coating; and a thermally induced phase change bonding layer is formed, so that no static electricity disturbs powder in the printing and powder scattering processes.

The invention belongs to the technical field of membrane separation, and particularly relates to a polyamide composite membrane containing amino-carboxyl bifunctional COFs as well as a preparation method and application of the polyamide composite membrane. The preparation method comprises the following steps: by taking 1, 3, 5-tri (4-aminophenyl) benzene, 4, 4 '-diaminobiphenyl-2, 2'-dicarboxylic acid and 1, 3, 5-trialdehyde phloroglucinol as monomers, carrying out solvothermal reaction to prepare a bifunctional COFs material rich in amino groups and carboxyl groups at the same time; the preparation method comprises the following steps: dispersing a COFs material in a water phase containing polyamine, and carrying out interfacial polymerization on the water phase and an oil phase containing polyacyl chloride to prepare the composite membrane. COFs are firmly anchored in a polyamide network through a covalent reaction between amino and an acyl chloride monomer, so that the problems that the COFs are easy to fall off and non-uniform in dispersion are solved; the water flux is improved by regular pore channels of COFs, the membrane is endowed with strong hydrophilicity and electronegativity by carboxyl, the desalination rate and the pollution resistance are remarkably enhanced, and the COFs-based composite membrane has a wide application prospect in seawater desalination and high-salinity wastewater treatment.

The invention relates to the technical field of corrosion protection of petrochemical equipment, and particularly discloses an efficient neutralizing corrosion inhibitor and a preparation method thereof. The efficient neutralizing corrosion inhibitor is prepared from the following raw materials in parts by mass: 40-60 parts of a macromolecular corrosion inhibitor, 10-20 parts of a neutralizing agent, 10-15 parts of a surfactant, 5-10 parts of an auxiliary agent and water, the high-molecular corrosion inhibitor is formed by copolymerization of an alkenyl imidazoline quaternary ammonium salt monomer, an alkenyl sulfonate monomer and an alkenyl dicarboxylic acid monomer. The neutralizing agent comprises monoethanolamine and diethanolamine; wherein the use amount of the water meets the condition that the efficient neutralizing corrosion inhibitor is prepared into a solution with the solid content of 10%-12%, and at the moment, the pH value of the solution is 11.0-11.5. The high-efficiency neutralizing corrosion inhibitor prepared by the invention effectively realizes the synergy of low dosage and high corrosion inhibition rate.

The invention provides a repairing method suitable for an engine case connecting bolt. The method comprises the following steps that S1, chemical stripping and fine treatment are conducted on the connecting bolt, an old plating layer on the surface of the connecting bolt is removed, and the surface of the connecting bolt is evenly coarsened; s2, a nitric acid-phosphoric acid binary acid system is adopted to conduct soaking treatment on the connecting bolt treated in the step S1 at the normal temperature, and a passive film on the surface of the connecting bolt is removed; s3, the connecting bolt treated in the step S2 is subjected to chemical nickel plating; and S4, the connecting bolt treated in the step S3 is subjected to hot water stabilization and dehydrogenation treatment, and the repaired connecting bolt is obtained. The invention provides a set of process from old plating layer removal, passive film removal and chemical nickel plating to hydrogen brittleness avoidance, so that the whole repair process is highly controllable, the product quality is stable and repeatable, and the problem of batch scrapping caused by batch difference and process uncontrollability in the prior art is solved.

Disclosed are oral care compositions comprising: a tooth ligand mixture comprising a monocarboxylic acid, a dicarboxylic acid, and / or a tetracarboxylic acid; and a stannous ion source and a fluoride ion source, such as stannous fluoride. The oral care compositions show the ability to prevent and / or treat dental erosion and / or dental caries.

The invention discloses a preparation method of a modified lithium titanate battery negative electrode material. The preparation method comprises the following steps: S1, weighing zirconium chloride and benzoic acid, dissolving the zirconium chloride and benzoic acid in N, N-dimethylformamide, and mixing to obtain a first solution; s2, weighing 2, 2 '-bipyridine-5, 5'-dicarboxylic acid formic acid, dissolving the 2, 2 '-bipyridine-5, 5'-dicarboxylic acid formic acid into N, N-dimethylformamide, and mixing to obtain a second solution; s3, adding the first solution into the second solution, uniformly mixing, and reacting to obtain a third solution; s4, the third solution is subjected to suction filtration, washing and drying, and powdery UiO-bpy is obtained; s5, weighing lithium titanate powder and UiO-bpy, dissolving the weighed lithium titanate powder and UiO-bpy in ethanol to obtain a fourth solution, and drying the fourth solution to obtain an intermediate sample; and S6, heating the intermediate sample in a tubular furnace under the protection of Ar atmosphere, and cooling to obtain the battery negative electrode material UiO-bpy (LTO), thereby solving the problems of low electronic conductivity, poor rate capability and insufficient energy density of the lithium titanate (LTO) negative electrode material.

This application belongs to the technical field of grouting materials for tunnel engineering, specifically relating to a grouting material suitable for tunnel rock strata reinforcement and its preparation method. It includes component A and component B; by weight, component A comprises: 75-85 parts of a first base material, 10-20 parts of a coupling agent, and 2-5 parts of a catalyst; component B comprises: 70-80 parts of a second base material and 15-25 parts of a modifying accelerator; wherein, the first base material is a water glass solution, and the physicochemical properties of the water glass solution meet the following conditions: modulus > 2.5, Baume degree < 40°Bé; the second base material is composed of isocyanate compounds and glycidyl etheroxypropyl cage-like polysilsesquioxane in a weight ratio of 100:(11-23); the modifying accelerator includes polyvinylpyrrolidone and dicarboxylic acid alkyl ester compounds. The two base materials synergistically cure at low temperature to form a highly cross-linked organic-inorganic composite network, thereby significantly improving the compressive strength of the solidified body.

The present disclosure relates to providing a filter aid wherein the filter aid comprises: a first composition comprising inorganic particles, the inorganic particles comprising silicon; and a second composition comprising a dicarboxylic acid or a dicarboxylic acid polymer. The present disclosure also describes methods of preparation and filtration.

A process for production of both purified recycled aromatic dicarboxylic acid (rCA) and purified aromatic dicarboxylic acid (vCA), said process comprising:Producing a first stream comprising a recycled aromatic dicarboxylic acid by a first process, wherein the first process comprises the depolymerisation of a polymer feedstock comprising a polymer of said aromatic dicarboxylic acid in a first reaction system;Producing a second stream comprising the aromatic dicarboxylic acid by a second process wherein the second process comprises the oxidation of an aromatic hydrocarbon in a second reaction system;Purifying both the first stream and the second stream in a common purification system to thereby produce both purified recycled aromatic dicarboxylic acid (rCA) and purified aromatic dicarboxylic acid (vCA).The present invention also provides an apparatus for the production of both purified recycled aromatic dicarboxylic acid (rCA) and purified aromatic dicarboxylic acid (vCA),

The present disclosure pertains to improved methods of preparing high melting dicarboxylic acids or oxo-acids (e.g., carboxylic acid / aldehydes) by ozonolysis of their esters. For example, the present disclosure provides methods for preparing brassylic acid by way of the ozonolysis of erucic acid ester, the method comprising the steps of converting the erucic acid to an ester, performing ozonolysis on the ester, and converting the resulting brassylate ester product to brassylic acid.

The invention discloses a preparation system and method of 2, 5-furandicarboxylic acid. The preparation system comprises a sectional reactor, a raw material storage tank, an oxidizing agent storage tank, a pH value adjusting tank and a solid-liquid separator, the sectional reactor comprises a shell, a reaction area and a reaction liquid collecting cavity; the reaction liquid collecting cavity is arranged between the reaction area and the shell; the reaction zone comprises alternately arranged catalyst bed layers and mixing chambers, the axial center of the sectional reactor is provided with a first mixing chamber, and the alternately arranged outermost layer is the catalyst bed layer; inlets are formed in the tops of all the mixing chambers; a reaction liquid outlet is formed in the bottom of the shell. The method has the advantages of high reaction efficiency, mild reaction conditions, few byproducts, simplicity in operation, low reaction cost and the like.

The invention belongs to the technical field of medicines, and particularly relates to an aryl dicarboxylic acid compound, a preparation method and application of the aryl dicarboxylic acid compound as an antibacterial agent. The compound is shown as a formula (1), wherein R1, R2, R3, R4, R5, R6, R7, R8, R9 and R10 are independently selected from hydrogen and halogen. Two ends of the molecule are connected through an N-phenylpropanamide connecting arm, the molecule is a compound with a novel structure, and the series of compounds have a relatively strong inhibition effect on acinetobacter baumannii and are worthy of further research and development.

This invention relates to: an aliphatic polyester containing structural units (a1) derived from an aliphatic diol having alkyl branches and a main chain having 3 or more carbon atoms and structural units (a2) derived from an aliphatic dicarboxylic acid, and satisfying specific conditions; a resin composition comprising the aliphatic polyester and a molded article thereof; a method for manufacturing the aliphatic polyester satisfying the specific structure and conditions; a block copolymer satisfying the specific structure and conditions; a resin composition comprising the block copolymer and a molded article thereof; and a method for manufacturing the block copolymer satisfying the specific structure and conditions (the specific structures and conditions are as described in the specification).

The present disclosure relates to a co-polyester resin of a composition including dicarboxylic acid, wherein the composition includes C2-5 aliphatic diol and isosorbide in an amount of 70 mol to 97.5 mol and 2.5 mol to 30 mol, respectively, based on 100 mol of the dicarboxylic acid, and the dicarboxylic acid includes C2-6 aliphatic dicarboxylic acid and cyclic aromatic dicarboxylic acid.

Title: ANHYDROUS LIQUID COMPOSITION COMPRISING SQUALANE, ACID DIMER DERIVATIVES, PASTY COMPOUNDS, A MINERAL THICKENER AND METHOD FOR IMPLEMENTING IT The present invention relates to a liquid cosmetic composition comprising: * squalane; * at least one first compound selected from polyesters obtained at least from a dimer of mono- or polyunsaturated fatty acid; the fatty acid comprising from 16 to 22 carbon atoms; * at least one second compound, solid at room temperature, selected from vegetable butters, polyesters resulting from the condensation of a linear or branched C6-C10 dicarboxylic acid and an ester of diglycerol and monocarboxylic acids, possibly hydroxylated, linear or branched, in C6-C20; as well as mixtures thereof;* at least one non-volatile polar hydrocarbon oil, different from the first compound(s);* at least one mineral thickener;* possibly water at a content not exceeding 2% by weight, relative to the total weight of the composition. It also relates to a process for makeup and / or care of human keratinous materials, in particular of the lips, consisting of applying said composition.

Disclosed are a flux containing rosin, an active agent, and a solvent, the active agent containing an imidazole compound and two dicarboxylic acids, the two dicarboxylic acids being combined with malonic acid using one selected from succinic acid, adipic acid, and sebacic acid, and a method for preparing a joined body using the flux. Or the soldering flux contains rosin, an active agent and a solvent, the active agent contains an imidazole compound and two dicarboxylic acids, and the two dicarboxylic acids are combined with succinic acid and one selected from suberic acid, sebacic acid, methylsuccinic acid, malic acid and malonic acid. According to the present invention, it is possible to provide a flux capable of increasing the leg size and suppressing the occurrence of bridging during soldering.

A polyester-based polymer according to the present invention contains 30 mol% or more of cyclohexanedicarboxylic acid, dimethylcyclohexanedicarboxylate, or a combination thereof as a dicarboxylic acid component, and thus is environmentally friendly, has controlled softness, and has excellent quality and processability. In addition, the polyester-based polymer includes a linear C3-C6 alkanediol or the like as a diol component, thereby improving cold resistance, chemical resistance, and elasticity while having softness.

A curable composition for spray coating contains 100 parts by weight of a polyalkylene oxide-based polymer (A) having a reactive silicon group, 10 to 50 parts by weight of a hydrocarbon-based diluent (B), 30 to 90 parts by weight of a plasticizer (C) which is a dicarboxylic acid ester containing a cyclic hydrocarbon group, and 0.6 to 7 parts by weight of a polyamide-based rheology modifier (D). A cured film is produced by spraying the above curable composition on the surface of a substrate and curing it.

This polymer film 10 is characterized by comprising a first resin layer 11, a second resin layer 12, and a third resin layer, in that order. The polymer film is also characterized in that: the first resin film 11 forms one outermost layer of the polymer film 10; the first resin layer 11 includes a polyamide resin; the polyamide resin includes a copolymer polyamide that is a polycondensation product of diamine units and dicarboxylic acid units; the proportion of the number of aromatic diamine units to the total number of diamine units included in the polyamide resin that forms the first resin layer 11 is at least 75 mol%; the proportion of the number of isophthalic acid units to the total number of dicarboxylic acid units included in the polyamide resin that forms the first resin layer 11 is at least 22 mol%; the second resin layer 12 includes acid-denatured polypropylene; and the third resin layer 13 includes homopolypropylene.

The application discloses a rust-proof enhancer for PAG quenching liquid, and raw materials of the rust-proof enhancer include the following components in parts by weight: 40-45 parts of organic-inorganic rust-proof additive, 35-40 parts of pH regulator, 5-10 parts of non-ferrous metal rust-proof agent and 5-10 parts of antibacterial agent; the organic-inorganic rust-proof additive is a mixture of dicarboxylic acid, tricarboxylic acid, phytic acid, isomeric decanoic acid, fatty acid amide or fatty acid amine salt and sodium tungstate; the components synergistically generate a stable rust-proof film on the surface of metal, the rust-proof film has strong adhesion and can be firmly attached to the surface of metal, is less affected by the polarity of PAG, can effectively enhance the rust-proof performance of steel workpieces after quenching, and has no adverse effect on the properties such as the cloud point, viscosity, foam and cooling characteristics of the quenching liquid.