56 results about "Trimellitic acid" patented technology

The invention discloses self-adhesion-crosslinking double modified bamboo powder, a preparation method and application, and relates to the technical field of composites.The preparation method of the modified bamboo powder comprises the following steps that S1, bamboo powder, 2, 5-dihydroxyterephthalic acid, 4-aminobenzoyl hydrazine, N, N '-diisopropylcarbodiimide and tris (hydroxymethyl) aminomethane are mixed for a reaction; and S2, trimesic acid is added into the solution obtained after the reaction in the S1 for a reaction, filtering, washing and drying are conducted, and the self-adhesion-crosslinking double modified bamboo powder is obtained. The prepared modified bamboo powder is green and environmentally friendly, through a self-adhesion mechanism, a cross-linking mechanism, a branched-chain phenyl heterogeneous nucleation mechanism and the like, the interfacial compatibility of PBAT and the bamboo powder and the crystallinity of PBAT are improved, and therefore the mechanical property of PBAT / bamboo powder is enhanced.

The invention discloses Pseudomonas putida, a bacterial agent thereof and an application of the Pseudomonas putida in chemical wastewater treatment, the Pseudomonas putida is named as PH-20 and preserved in the China General Microbiological Culture Collection Center on March 17, 2025, and the preservation number of the strain is CGMCC No. 33831. The invention further discloses a preparation method of the Pseudomonas putida. The pseudomonas putida disclosed by the invention can be used for rapidly degrading polybenzoic acid such as terephthalic acid, phthalic acid, isophthalic acid, trimellitic acid, trimellitic acid and pyromellitic acid in wastewater under the conditions of high salt and low temperature, and the degradation effect is still excellent under the condition that various pollutants coexist.

This invention provides a method for recovering and utilizing distillation residue after solvent removal from homohydric anhydride, relating to the field of fine chemical technology. The method includes anhydride treatment, vaporization and sublimation, dissolution and recrystallization, distillation, and water washing. In this invention, the distillation residue is anhydride-treated under high temperature and negative pressure, followed by vaporization and sublimation under vacuum to separate mechanical impurities and high-boiling substances. Then, through dissolution and recrystallization, the difference in solubility between homohydric anhydride and metahydric anhydride in polar solvents is utilized to preferentially crystallize out the homohydric anhydride. The mother liquor is distilled to remove the solvent, and then colored impurities are removed by hot water washing and activated carbon adsorption. Finally, it is cooled and crystallized to obtain trimellitic acid. The homohydric anhydride obtained by this invention has a purity ≥95% and a yield of 84-89%, and the trimellitic acid has a purity ≥97% and a yield of 81-86%. This method achieves effective recovery of high-value-added components from distillation residue, demonstrating significant economic and environmental benefits and promising application prospects.

The present invention relates to the technical field of electrode foil pretreatment, and specifically to a pretreatment method for electrode foil, which comprises the following steps: S1, pickling of electrode foil; S2, organic liquid washing of electrode foil; S3, primary formation treatment; S4, treating the electrode foil with γ-methacryloxypropyltrimethoxysilane, polyvinylpyrrolidone, trimellitic acid, ethanol and deionized water; S5, secondary formation treatment; S6, tertiary formation treatment; S7, heating after drying. The electrode foil prepared by the present invention not only has low energy consumption and is convenient to process, but also has a high specific capacitance and a small leakage current for the prepared electrode foil.

An odontoblast proliferation / differentiation promoting agent contains a calcium salt of 4-(meth)acryloyloxyethyltrimellitic acid.

A plasticizer composition contains a compound of the formula (1)and at least one trialkyl trimellitate, where the three alkyl groups in the trialkyl trimellitate each have 8 or 9 carbon atoms.

The utility model discloses a kind of trimellitic acid trioctyl continuous method stripping dealcoholization process research and development device, it is related to trimellitic acid trioctyl continuous method stripping dealcoholization technical field, its technical scheme main point is: including stripping column, stripping column inside is connected with silk screen by multiple bolts, wherein, stripping column is located silk screen lower end and is provided with cleaning mechanism, for the impurity on silk screen is cleaned, the cleaning mechanism is provided with conveying mechanism, for the impurity on silk screen is transported after cleaning, stripping column is provided with receiving mechanism, for the impurity transported by conveying mechanism is concentrated and received, effect is thereby solve the problem in background art that need greater power to maintain gas flow, lead to energy consumption increases substantially, simultaneously, after silk screen aperture is blocked by impurity or by-product, originally designed droplet interception capacity will reduce.

The invention relates to the technical field of preparation of antibacterial materials, in particular to a two-dimensional nickel (II) coordination polymer as well as a preparation method and antibacterial application thereof. The preparation method comprises the following steps: mixing a dpb solution, a btc solution, a Ni (NO3) 2 solution, acetonitrile and water, carrying out a solvothermal reaction for 4-5 days, carrying out natural cooling crystallization, washing and drying to obtain [Ni3 (dpb) 2 (btc) 2 (H2O) 2] n, and according to the complex, nickel (II) has two coordination modes, and nickel (II) is coordinated with carboxyl oxygen atoms of two trimesic acid, oxygen atoms of two water molecules and nitrogen atoms of two ligands; nickel 2 (II) is coordinated with three nitrogen atoms of a ligand and three oxygen atoms of two trimesic acids to form a one-dimensional ladder-shaped chain structure, and the ladder-shaped chain is further bridged with the ligand to form a two-dimensional layered structure. The compound has very good thermal stability, has a good inhibition effect on staphylococcus aureus and escherichia coli, is non-toxic to human embryo kidney cells in 24 hours and 48 hours, and can be used as a bacteriostatic drug material carrier in the aspect of medicine.

The invention discloses a preparation method and application of benzenetricarboxylic acid isomer modified chitosan, and the preparation method comprises the following steps: step 1, respectively dissolving trimesic acid, trimellitic acid and trimellitic acid in a sodium hydroxide solution to obtain a benzenetricarboxylic acid solution; 2, dissolving chitosan with an acetic acid solution to obtain a chitosan mixed liquid; 3, slowly adding the benzenetricarboxylic acid solution obtained in the step 1 into the chitosan mixed liquid obtained in the step 2, and continuously stirring to react until a white gel material is formed; and 4, filtering the white gel material prepared in the step 3, washing to be neutral, and drying to obtain the adsorbent. The three adsorbents prepared by the invention all have unique space structures and surface chemical characteristics, and anionic polymer chains of the adsorbents are rich in carboxyl, carbon-carbon double bonds, carbonyl and other functional groups, so that high-selectivity adsorption of rare earth metal lanthanum ions can be realized, and the adsorbent is suitable for recognition, separation and recovery of lanthanum ions in water with complex components.

The present disclosure provides an air-repellent manganese-based adsorbent and a preparation method and chain-integrated application thereof, wherein the preparation method comprises the following steps: (1) mixing a manganese source and a lithium source with water to obtain a mixed solution; (2) mixing the mixed solution with a trimellitic acid solution for a hydrothermal reaction; (3) sintering the material obtained by the hydrothermal reaction to obtain the air-repellent manganese-based adsorbent. The present disclosure prepares an air-repellent manganese-based adsorbent by modification, and the adsorbent can avoid the accumulation and rupture of bubbles to produce a cavitation effect that damages its microstructure, thereby improving the stability of the adsorbent, and can also be directly used to synthesize MOF-coated lithium manganate positive electrode materials after lithium extraction fails.

The invention discloses a photovoltaic cable, and relates to the technical field of cables, and the photovoltaic cable comprises an insulating layer. The insulating layer comprises the following components in percentage by mass: 45%-48% of polyvinyl chloride resin with the polymerization degree of 2500, 20%-24% of a heat-resistant plasticizer, 5.7%-7% of a heat stabilizer, 1.13%-1.18% of an antioxidant, 12%-15.5% of a flame retardant, 6%-7.5% of a filler, 2.25%-2.4% of a processing aid, 0.5%-1.5% of a lubricant and 0.02% of a coloring agent; wherein the heat-resistant plasticizer is prepared from trioctyl trimellitate, tridecyl trimellitate and epoxidized soybean oil; or the heat-resistant plasticizer comprises trioctyl trimellitate and tridecyl trimellitate. The specific heat-resistant plasticizer, the flame retardant, the heat stabilizer, the antioxidant, the filler, the processing aid, the lubricant and the coloring agent are introduced according to a certain mass ratio on the basis of the high-polymerization-degree polyvinyl chloride, so that the photovoltaic cable has good heat resistance and flame retardance.

The application provides a sandwich-structured photocatalyst, which is constructed by TiO2 nanosheets and a Co-Fe / MOF with bimetallic activity, the TiO2 nanosheets are covered on the surface of the Co-Fe / MOF to form a layered sandwich structure, and the Co-Fe / MOF is a metal organic framework compound prepared from a precursor of uniform trimellitic acid, cobalt and iron. The precursor of cobalt and iron is stirred and dissolved in an organic solvent, the TiO2 nanosheets are dispersed and immersed in the precursor solution, then the uniform trimellitic acid is added into the immersion liquid to be stirred and ultrasonically dispersed, and then the reaction is carried out in an autoclave by heating, the reaction liquid is centrifuged, washed and vacuum dried to obtain the sandwich-structured photocatalyst TiO2NS@Co-Fe / MOF. The preparation method of the sandwich-structured photocatalyst is simple in reaction system and simple in preparation process, and is suitable for large-scale production. The photocatalyst prepared by the application combines the double functions of the TiO2 nanosheet photocatalysis and the Co-Fe / MOF heterogeneous Fenton interface catalysis, plays a synergistic effect, and can effectively degrade phenolic substances in wastewater.

The invention relates to the technical field of electrode foil pretreatment, in particular to an electrode foil pretreatment method which comprises the following steps: S1, acid pickling of an electrode foil; s2, washing the electrode foil with organic liquid; s3, performing primary formation treatment; s4, the electrode foil is treated through gamma-methacryloxy propyl trimethoxy silane, polypyrrolidone, trimesic acid, ethyl alcohol and deionized water; s5, performing secondary formation treatment; s6, performing third-stage formation treatment; and S7, heating after drying. The prepared electrode foil is low in energy consumption and convenient to process, and meanwhile the prepared electrode foil is high in specific volume and small in leakage current.

The present invention provides a method for preparing an ester-based material, the method including a step in which in a batch reactor, under a catalyst, at least one polycarboxylic acid selected from the group consisting of a terephthalic acid, a phthalic acid, an isophthalic acid, a cyclohexane dicarboxylic acid, a cyclohexane tricarboxylic acid, a trimellitic acid, and citric acid reacts with at least one mono-alcohol having 3 to 12 alkyl carbon atoms, wherein pressure in the reactor is configured such that the pressure at the early stage is 0.3 barg to 1.0 barg and the pressure at the latter stage is 0 barg to 0.5 barg, the pressure at the early stage being greater than the pressure at the latter stage, and the early and latter stages are divided based on any one of the time points when reaction conversion rate is 30% to 90%.

The present invention relates to a method for the supercritical fluid extraction of at least one plasticizer, in particular of phthalate and / or citrate and / or trimellitate type, contained in a solid polymer material, according to which fragments of said material are brought into contact, at least once, with said supercritical fluid for a given period of time, then said fluid is separated from said extracted plasticizer contained therein. Characteristically, said fragments are flakes that have a length greater than about 500 µm, in particular greater than or equal to about 700 µm and more particularly greater than about 710 µm and less than about 2000 µm.

A vinyl chloride resin composition contains (a) a vinyl chloride resin and (x) a plasticizer. The (x) plasticizer includes (b) a trimellitic acid ester and (c) a polyester including a structural unit derived from adipic acid and a structural unit derived from 3-methyl-1,5-pentanediol. The total content of the (b) trimellitic acid ester and the (c) polyester is 65 parts by mass or more per 100 parts by mass of the (a) vinyl chloride resin, and the proportion constituted by the content of the (c) polyester in the total content of the (b) trimellitic acid ester and the (c) polyester is more than 50 mass %.

The present application relates to a kind of quantitative determination electronic cigarette liquid trimellitic acid, p-phthalic acid, m-phthalic acid method, belong to electronic cigarette liquid component detection technical field, it is characterized in that: using to electronic cigarette liquid sample adds certain concentration of formic acid aqueous solution extraction and improves the acid-base environment of sample, further purify sample by vortex, filtration, using core-shell (surface porous) reversed-phase chromatographic column, realize the complete separation of three target objects, combined with liquid chromatography mass spectrometer technology, internal standard method quantitative, realize the accurate detection of trimellitic acid, p-phthalic acid, m-phthalic acid in electronic cigarette liquid.The present application has the advantages that simple operation, quantitative accurate, high sensitivity, target can be extracted from complex electronic cigarette liquid matrix and accurately quantified, can satisfy the accurate detection of trimellitic acid, p-phthalic acid, m-phthalic acid in electronic cigarette liquid.

The application discloses a kind of fabric whole core flame-retardant conveying belt rubber and plastic fiber flame-retardant covering gum and preparation method thereof, including the following components: FR-PVG powder, polyvinyl chloride, chlorosulfonated polyethylene rubber, magnesium oxide, epoxy resin, accelerator DM, accelerator TRA, conductive carbon black, trimellitic acid trioctyl ester, flame retardant, epoxy soybean oil, ammonium polyphosphate melamine, antimony trioxide, calcium-zinc composite stabilizer, coupling agent, PE wax, 10wt% sulfuric acid solution, methacrylic acid, dicumyl peroxide;The application utilizes FR-PVG as matrix to prepare rubber and plastic fiber flame-retardant covering gum, avoids environmental pollution problem caused by processing FR-PVG, realizes green recycling and high-value utilization of FR-PVG, and innovates a new way of high-value and efficient green recycling and utilization of waste rubber and plastic fabric whole core flame-retardant conveying belt.

The application discloses a sleeve material for heat-shrinkable terminals, which is prepared from the following raw materials in parts by weight: 100 parts of polyetherimide, 10-30 parts of polycarbonate, 20-40 parts of trizinc trimellitate, and 2-8 parts of nano-zinc stannate. The application also discloses a preparation method of the sleeve material for heat-shrinkable terminals and heat-shrinkable terminals prepared therefrom. The sleeve material for heat-shrinkable terminals has the characteristics of high strength and transparency, low water absorption, excellent high-temperature resistance and flame resistance, and good processability, and has better comprehensive performance.

The invention relates to an integrated preparation process of low-residue trioctyl trimellitate, which comprises the following steps: carrying out ring-opening reaction on trimellitic anhydride and 2-ethyl hexanol under the protection of inert gas; then adding a main catalyst to carry out first-stage esterification reaction; then adding a cocatalyst to carry out a second-stage esterification reaction, after the esterification reaction is finished, carrying out first treatment on the reaction liquid by using a 2-5% dilute sodium carbonate or sodium hydroxide solution, then adjusting the pH value of the reaction liquid subjected to the first treatment to 2-3 by using dilute sulfuric acid or hydrochloric acid, and carrying out countercurrent washing by using hot water; adding excessive organic acid into the reaction liquid for reaction to obtain esterification reaction liquid after the catalyst is recycled; and finally, sequentially adsorbing, filtering and refining to obtain the low-residue trioctyl trimellitate. According to the method, a multi-element catalyst system and a step-by-step esterification process are adopted, and esterification reaction liquid after reaction is treated in a three-step treatment mode, so that efficient recovery of a catalyst is realized, and residues of the catalyst in trioctyl trimellitate are effectively reduced.

The invention relates to the technical field of trimesic acid, and discloses a method for preparing trimesic acid, which comprises the following step: carrying out oxidation reaction on mesitylene in a liquid phase catalysis system containing a phase transfer agent and water to obtain trimesic acid. By adopting the method disclosed by the invention, the oxidation reaction of mesitylene can be carried out in water, so that the corrosion of the oxidation reaction of mesitylene to equipment is reduced, and the requirement on the equipment is reduced. By adopting the method disclosed by the invention, not only can the purity of the trimesic acid product be improved, but also higher yield of the trimesic acid product can be obtained.

To solve such a problem that polyamide imide particles produced with a conventional method have large particle sizes and when used as a binder material of a powdered paint such as a fluororesin, film thickness after coating is not uniform and particle size distribution is sharp, therefore gaps are produced between polyamide imide particles and the fluororesin, the fluororesin included in a powdered paint is brought into contact with a coating object (a metal or the like) such that the bond strength is lowered.SOLUTION: In producing a polyamic acid by making an acyl chloride derivative of trimellitic acid anhydride, 4,4'-diaminodiphenyl ether and m-phenylenediamine as raw materials react with one another in an organic polar solvent, the raw materials are added so as to be 20-23 wt.% based on the reaction mixture and the polyamic acid is obtained, and subsequently polyamide imide particles are produced by ring closure.SELECTED DRAWING: None

This invention provides a high-reliability halogen-free solder paste flux, its preparation method, and its application, relating to the field of soldering materials. The flux comprises a solvent, a film-forming agent, an activator, a thixotropic agent, and functional additives. The film-forming agent is composed of polymeric rosin, hydrogenated rosin glycerol ester, and trimellitic acid. Based on 100% of the total flux weight, the polymeric rosin content is 18%–26%, the hydrogenated rosin glycerol ester content is 10%–18%, and the trimellitic acid content is 0.5%–2%. The preparation method includes: uniformly mixing the raw materials under vacuum conditions, heating, high-speed shear emulsification treatment, and cooling. The high-reliability halogen-free solder paste consists of flux and alloyed tin powder, with the flux accounting for 9%–12% of the solder paste's mass. This invention ensures excellent soldering performance while completely eliminating halogen risks, significantly reducing post-soldering residues, and improving surface insulation resistance, meeting the stringent requirements of high-reliability electronic assembly.

The invention relates to a high-temperature-resistant PVC (polyvinyl chloride) color master batch and a preparation method thereof. The high-temperature-resistant PVC color master batch comprises the following components in percentage by weight: more than 52% of PVC resin, 6-7.5% of a lubricant and 1.9-2.85% of a heat stabilizer, 0%-20% of a coloring agent, 0.03%-0.06% of an antioxidant and a plasticizer gt; 12%, 0-3% of a filler; the heat stabilizer comprises the following components in percentage by weight: 1.2%-1.8% of an organic tin heat stabilizer, 0.6%-0.9% of a calcium-zinc composite heat stabilizer and 0.1%-0.2% of a phosphite ester auxiliary heat stabilizer, wherein the calcium-zinc composite heat stabilizer is premixed with 0.5% of beta-diketone; the plasticizer comprises one or more of trimellitates, polyesters and epoxidized fatty acid methyl esters, and when the plasticizer is a single component, the plasticizer is the trimellitates or the polyesters; when the plasticizer contains epoxidized fatty acid methyl ester, the addition amount of the epoxidized fatty acid methyl ester does not exceed 30% of the total amount of the plasticizer. The stable performance of the PVC color master batch in a high-temperature environment is realized, the quality is controllable in the preparation process, and the comprehensive use effect is excellent.

The application discloses a ZnIn2S4 / MOF-based S-type heterojunction composite photocatalyst and a preparation method and application thereof. The preparation method comprises the following steps: S1, preparing MOF-808: taking a zirconium salt as a metal source and a uniform trimellitic acid as an organic ligand, and performing an oil bath heating reaction in the presence of a control agent, and after the reaction is completed, centrifugal washing and drying treatment are performed to obtain the MOF-808; S2, in-situ growth of ZnIn2S4: dispersing the MOF-808 prepared in the step S1 in a mixed solvent, performing ultrasonic treatment to form a uniform suspension, sequentially adding a zinc source, an indium source and a sulfur source, and then performing a hydrothermal reaction after uniform stirring. The S-type ZnIn2S4 / MOF heterojunction structure constructed by the ZnIn2S4 / MOF-based S-type heterojunction composite photocatalyst and the preparation method and application thereof can reach a visible light degradation rate of 88.5% on tetracycline, and still maintains high activity and structural stability after multiple cycles, and exhibits good anti-interference ability and repeated use performance.

The invention relates to the technical field of trimesic acid, and discloses a catalyst for preparing trimesic acid and a method for preparing trimesic acid, the catalyst comprises cobalt salt, manganese salt, hafnium salt, lanthanum salt and alkali metal bromide; the method comprises the following step: in the presence of the catalyst, a solvent and an optional dispersing agent, carrying out oxidation reaction on mesitylene to obtain trimesic acid. The reaction is carried out under normal pressure, the reaction temperature is 80-100 DEG C, the reaction is easy to realize, the reaction condition is mild, the operation is facilitated, and the weight yield and the product purity of the trimesic acid are improved.

The present invention relates to a plasticizer composition containing a trimethyl ester of cyclohexane-1, 2, 4-tripropionic acid and a trialkyl trimellitate. The present invention relates to a plasticizer composition comprising a compound of formula (1) and at least one trialkyl trimellitate wherein the three alkyl groups in the trialkyl trimellitate each have 8 or 9 carbon atoms.

This invention relates to the field of fine chemicals technology, specifically to a method for preparing trimellitic acid triester. The method includes: (1) adding a catalyst and an alcohol to crude trimellitic acid, heating under reflux, and separating water to obtain a reactant; (2) mixing the reactant with water, separating the layers to obtain an oil phase; (3) removing the alcohol from the oil phase to obtain trimellitic acid triester; wherein the catalyst is selected from at least one of protic acids, Lewis acids, and solid polyacids; the alcohol is selected from at least one of C4-C10 alcohols; and the crude trimellitic acid product contains at least 5 wt% acetic acid. The residual acetic acid in the crude trimellitic acid product, in the presence of the catalyst, reacts with the alcohol to form acetate ester, which acts as a dehydrating agent. The acetate ester, alcohol, and water form a ternary azeotropic compound that removes water from the reaction system, increasing the conversion rate of esterification.

The invention relates to a method for extracting a trimellitic anhydride effective component in a trimellitic anhydride heavy component and preparing trioctyl trimellitate, which comprises the following steps: by taking the trimellitic anhydride heavy component and ethanol as raw materials, carrying out ethyl esterification under the action of a catalyst to generate triethyl trimellitate, and then distilling to obtain high-purity triethyl trimellitate. And carrying out transesterification on triethyl trimellitate to obtain a trioctyl trimellitate finished product. The trimellitic anhydride heavy component contains 20-30% of trimellitic anhydride effective component, trimellitic anhydride in the trimellitic anhydride heavy component is effectively extracted through ethyl esterification and distillation operation by utilizing the characteristic that the boiling point of triethyl trimellitate is low, and a trioctyl trimellitate finished product is prepared. According to the method, the trimellitic anhydride heavy component is effectively recycled, so that the waste treatment cost is reduced, and the raw material utilization rate is increased.

The utility model relates to the technical field of equipment for crystallizing to form anhydride, and particularly discloses continuous equipment for crystallizing trimellitic anhydride to form anhydride, which comprises a feeding section, a multi-stage crystallizing section, a blanking kettle and a plurality of layers of gas-phase pipelines, meanwhile, the conical flash plate and the inverted conical flash plate are in jacket design, and high-temperature hot water is introduced into the conical flash plate and the inverted conical flash plate to improve the light component removal crystallization efficiency; the multi-stage crystallization section comprises a plurality of sets of conical heating plates and inverted conical heating plates; high-temperature hot water and heat-conducting oil are respectively introduced into the heating plates and are used for light component removal crystallization of trimellitic acid; and the material enters the blanking kettle after the light crystal removal process and is heated and insulated through a jacket. The device is used for continuous production of trimellitic anhydride light component removal crystals, and has the advantages of simple structure, high heat exchange efficiency and good crystallization effect compared with the existing domestic equipment.