126 results about "Aromatic acid" patented technology

The invention provides a fluorine-containing aromatic acid ligand modified zirconium metal oxide nano-cluster photoresist material as well as a preparation method and application thereof. The preparation method of the fluorine-containing aromatic acid ligand modified zirconium metal oxide nano-cluster photoresist material comprises the following steps: mixing a Zr6O4 (OH) 4 (MAA) 12 solution and a fluorine-containing aromatic acid ligand compound solution, and carrying out reaction, rotary evaporation and drying to obtain the fluorine-containing aromatic acid ligand modified zirconium metal oxide nano-cluster photoresist material. The preparation method is simple, cheap and easily available in raw materials, low in cost and suitable for industrial production. The fluorine-containing aromatic acid ligand modified zirconium metal oxide nano-cluster photoresist material can be suitable for ultraviolet lithography, electron beam lithography and extreme ultraviolet lithography, and the formed photoetched pattern has the advantages of low line edge roughness, high resolution and the like, and has wide application prospects.

The invention relates to a decarboxylation coupling method catalyzed by N-heterocyclic carbene. Small organic molecule N-heterocyclic carbene is used as an organic catalyst, manganese is used as a reducing agent, aromatic acid or derivatives thereof and an electrophilic reagent are subjected to cross coupling, and multi-structure ketone is prepared. Small organic molecule N-heterocyclic carbene is used as an organic catalyst, manganese is combined as a reducing agent, cross coupling of aromatic acid or derivatives thereof and some cheap and easily available electrophilic reagents can be promoted, ketones with various structures can be provided at high yield, and the method is especially suitable for preparation of high-steric-hindrance ketone compounds and has wide application prospects. The method has the advantages of high yield, convenience in separation, high efficiency, mildness, low-cost economy and high industrial application value, and the requirement on transition metal catalysis can be reduced.

The invention relates to a method for preparing dimethyl terephthalate by catalyzing waste polyester in one step and dimethyl terephthalate. The invention relates to a method for preparing dimethyl terephthalate by catalyzing waste polyester in one step, which comprises the following steps: mixing a waste polyester material, a catalyst and a depolymerization solution for depolymerization reaction to obtain dimethyl terephthalate, the catalyst is selected from aromatic acid, aromatic acid alkali metal salt, a composition of aromatic acid and carbonate, a composition of aromatic acid and phosphate, a composition of aromatic acid and acetate, a composition of aromatic acid alkali metal salt and carbonate and a composition of aromatic acid alkali metal salt and phosphate; and a composition of aromatic acid alkali metal salt and acetate. The invention also provides the dimethyl terephthalate prepared by the method. The method provided by the invention solves the problems of low product purity and yield in the existing polyester waste chemical recovery method, and also solves the problems of high catalyst cost, harsh reaction conditions and easy secondary pollution to the environment in the existing recovery method.

The invention belongs to the technical field of catalysts, and particularly relates to a metal catalyst for oxidative depolymerization of industrial lignin as well as a preparation method and application of the metal catalyst. By controlling synthesis conditions, the alpha-Fe2O3 carrier with a small particle size and a high defect state is obtained, the specific surface area of the catalyst and the exposed number of surface active sites are effectively increased, and the reaction activity and reaction rate of the catalyst are remarkably enhanced. And secondly, Co / alpha-Fe2O3-D, Mn / alpha-Fe2O3-D and Cr / alpha-Fe2O3-D catalysts are prepared by adopting an atomic layer deposition method, so that the metal dispersibility and the interface synergistic effect are effectively improved, the catalysts are endowed with excellent structural stability and sulfur poisoning resistance, and the catalyst is suitable for desulfurization and efficient catalytic conversion of industrial lignin under harsh reaction conditions such as high temperature and high pressure. Experimental results show that after 8 hours of reaction, the depolymerization rate of lignin can reach 60%, the conversion rate of high-added-value products of aromatic aldehyde and aromatic acid exceeds 40%, and the overall performance is obviously superior to the existing similar technical level.

The present application relates to the field of textiles, and specifically discloses a kind of different shrinkage polyester low-elastic yarn and its preparation process, and its preparation process comprises the following steps: using aliphatic diol and aromatic acid as raw materials to carry out esterification reaction to obtain polyester raw materials; modifying the polyester raw materials with a regulator containing at least magnesium hydroxide whiskers and p-hydroxybenzoic acid to obtain primary modified polyester; mixing the primary modified polyester with apocynum fiber powder, modified organic bentonite and a compatibility promoter to carry out modification to obtain melt granulation to obtain modified polyester masterbatch; spraying the obtained modified polyester masterbatch and polyester chips from a convex-shaped spinneret hole, passing through an ultra-short windless zone under a spray washing plate, and then cooling and solidifying in a gradient-distributed uneven manner, and then undergoing low-temperature elasticization treatment to obtain different shrinkage polyester low-elastic yarn; the present application also discloses the different shrinkage polyester low-elastic yarn obtained by the above process, and the present application has the characteristics of having a far-infrared emission function on the basis of obtaining a single-component different shrinkage polyester low-elastic yarn.

The present invention provides a liquid crystal alignment agent, which can obtain a liquid crystal alignment film that has good resistance to AC afterimages or afterimages derived from residual DC and has good adhesion to a sealant, and can obtain a liquid crystal display element that suppresses the deviation of brightness within the surface during black display and has excellent contrast characteristics. The liquid crystal alignment agent is characterized in that it contains the following (A) components and (B) components. (A) component: a polymer (A) having a repeating unit represented by the following formula (1). (B) component: a polymer (B) having a repeating unit represented by the following formula (3). (In formula (1), R 1 ~R 4 is a hydrogen atom, a halogen atom, an alkyl group having 1 to 6 carbon atoms, etc., R 1 ~R 4 At least one of Y is a group other than a hydrogen atom as defined above. 1 is a divalent organic group having a partial structure represented by the following formula (H). 3 is a tetravalent organic group derived from an aromatic dianhydride, Y 3 is a divalent organic group having a partial structure represented by formula (m). 30 is a hydrogen atom or an alkyl group having 1 to 4 carbon atoms. 31 , Z 32 is a hydrogen atom, etc. )(Q 3 For - (CH 2 ) n -(n is 2 to 20), any -CH 2 - is optionally substituted by -O-. The oxygen atoms are not directly bonded to each other. Any hydrogen atom on the benzene ring is optionally substituted by a monovalent organic group. * represents a bond. )

The invention discloses a high-flux high-boron-removal reverse osmosis membrane and a preparation method thereof. The reverse osmosis membrane is prepared from the following raw materials: a solvent, a solute and a base membrane material, the solvent comprises a dipolar aprotic solvent / water mixed solvent and normal hexane; the solute comprises an aromatic acyl chloride monomer, an aromatic diamine monomer and an amino-modified natural polyhydroxy polymer; and the base membrane material is a polysulfone ultrafiltration membrane. The preparation method comprises the following steps: dissolving an aromatic acyl chloride monomer in n-hexane to obtain a solution A, dissolving an amino-modified natural polyhydroxy polymer in a dipolar aprotic solvent to obtain a solution B, then dissolving an aromatic diamine monomer in the solution B, then adding water to obtain a solution C, then immersing the base membrane in the solution C, and carrying out vacuum drying to obtain the composite membrane. After standing, removing the residual solution C on the surface of the base membrane, and immersing the base membrane into the solution A to carry out interfacial polymerization reaction; and carrying out post-treatment on the reacted membrane to obtain the reverse osmosis membrane. By adopting an organic-organic interface, the technical problem that the boron removal rate and flux of the existing polyamide reverse osmosis membrane are balanced is solved.

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.

The invention discloses amino-terminated hyperbranched polyamide acid as well as a preparation method and application thereof. The amino-terminated hyperbranched polyamide acid is formed by polymerizing an aromatic anhydride monomer, an aromatic triamine monomer and an aromatic diamine monomer; the mole numbers of the aromatic anhydride monomer, the aromatic triamine monomer and the aromatic diamine monomer are a, b and c respectively, a: (b + c) = 1: 1-1: 1.5, and the proportion of b to c is any proportion. The amino-terminated hyperbranched polyamide acid disclosed by the invention not only has abundant terminal amino groups, but also contains a large number of polar groups such as ether bonds, imidazole rings, amide groups and carboxyl groups in molecular chains. Therefore, a stable water-based colloid emulsion can be formed in the presence of water and a small amount of organic solvent, other auxiliaries are not needed, and the interface performance and the mechanical performance of the composite material can be greatly improved.

Provided is a novel compound that can achieve both dielectric properties and desmearability after curing. A radical polymerizable group-containing ester compound according to an embodiment comprises: an ester bond-containing molecule that consists only of one or more first units which each have a structure derived from a polyphenylene ether having hydroxy groups at both terminals, and one or more second units which each have a structure derived from a bifunctional or trifunctional aromatic acid halide and which are bonded to the first units by ester bonds; and a radical polymerizable group that is added to each molecular terminal of the ester bond-containing molecule.

We provide a water-based resin. [Solution] The aqueous resin is an ammonium salt formed by reacting an aromatic acid with an alkaline compound neutralization ring-opening intermediate compound. The alkaline compound neutralization ring-opening intermediate compound is formed by neutralizing the ring-opening intermediate compound with an alkaline compound, and the ring-opening intermediate compound is formed by carrying out a ring-opening reaction of a copolymer containing maleic anhydride using a tertiary amino alcohol. The chemical structures of the copolymer containing maleic anhydride, the tertiary amino alcohol, and the aromatic acid are as follows (wherein the formulas, the symbols are as defined in the specification). TIFF2026092659000036.tif25129

The invention discloses a room-temperature preparation method of ultra-small-size perovskite quantum dots, and belongs to the technical field of ultra-small-size perovskite quantum dots, and the method comprises the following steps: S1, placing CsBr, PbBr2 and aromatic acid powder in a container, adding a polar solvent, and stirring and mixing to obtain a transparent precursor solution; s2, adding an amine solution into the precursor solution to obtain a mixed solution, and adding the mixed solution into an anti-solvent to obtain a quantum dot coarse solution; s3, adding a metal salt solution into the quantum dot coarse solution, stirring, centrifuging, adding an organic solvent into supernate obtained by centrifuging, and centrifuging again to obtain quantum dot precipitates; and S4, dissolving the quantum dot precipitate in a mixed solution of toluene and DMF, and centrifuging again to obtain a clear and transparent quantum dot solution. The quantum dot interface is reconstructed through cooperation of FeBr3 and aromatic acid, so that the quantum dot obtains PLQY close to 100% and shows long-term stability.

The application discloses a modified phthalocyanine pigment, a liquid colorant and a preparation method and application thereof, and belongs to the technical field of pigments and colorants. The modified phthalocyanine pigment comprises the following components in percentage by weight: phthalocyanine pigment 90-99%, pigment derivative 1-10%. The pigment derivative is prepared by sulfonating the phthalocyanine pigment and then modifying the sulfonated phthalocyanine pigment by using a compound containing an amino group and a hydroxyl group and an aromatic acid. The pigment derivative has a benzoate structure. The liquid colorant comprises the following components in percentage by weight: carrier resin 55-90%, modified phthalocyanine pigment 10-40%, and functional additive 0-5%. The liquid colorant prepared by using the modified phthalocyanine pigment has small particle size, low viscosity and good storage stability. When the liquid colorant is applied to in-situ polymerization of polyester, the colored polyester fiber prepared has uniform color, and has good breaking strength, breaking elongation, soaping fastness and rubbing fastness.

The invention discloses a quinazoline-4-one compound containing 1,2,4-triazole [3,4-b] [1,3,4] thiadiazole, a preparation method thereof and antibacterial activity thereof. The compound is represented by general formula (I), and quinazoline-4-one, 1,2-dibromoethane, methyl 4-piperidinate, 80% hydrazine hydrate, potassium hydroxide, carbon disulfide and different aromatic acids are used as raw materials to prepare the target compound through a five-step reaction. The invention introduces an active 1,2,4-triazole [3,4-b] [1,3,4] thiadiazole unit into the quinazoline-4-one structure, and synthesizes a series of quinazoline-4-one compounds containing 1,2,4-triazole [3,4-b] [1,3,4] thiadiazole units, and the compounds have good antibacterial activity.

The invention discloses moisture-proof rust-proof powder for multiple metals. The moisture-proof rust-proof powder is prepared from the following raw materials in parts by weight: 5-15 parts of sulfonamide, 10-30 parts of fatty acid, 3-8 parts of triazole compounds, 2-4 parts of aromatic acid salt, 6-12 parts of fatty acid salt and 10-20 parts of auxiliaries. The triazole compound which has a good corrosion inhibition effect on nonferrous metals is used as a main corrosion inhibitor, substances which have no obvious accelerated corrosion effect on the nonferrous metals but have a good corrosion inhibition effect on black metals are added, and the ratio of all the components is adjusted, so that the purpose of having a good corrosion inhibition effect on the nonferrous metals and the black metals at the same time is achieved. The powder provided by the invention can form an effective protective layer on the surfaces of various metals, effectively inhibits the corrosion reaction of the various metals, and has excellent antirust ability. And all the raw materials used by the antirust powder are low-toxic or non-toxic, so that the antirust powder meets the green and environment-friendly requirements.

The invention provides POE (Polyolefin Elastomer) type refrigerating machine oil adaptive to an R32 refrigerant and a preparation method of the POE type refrigerating machine oil. The preparation method comprises the following steps: firstly, carrying out first-stage esterification reaction on pentaerythritol, aromatic acid, C14-C18 straight-chain fatty acid and a first part of C4-C8 branched-chain fatty acid under the action of a solid acid catalyst; and then adding a second part of C4-C8 branched chain fatty acid to carry out second-stage esterification reaction to obtain the POE type refrigerating machine oil, the molar ratio of the pentaerythritol to the aromatic acid to the C14-C18 straight-chain fatty acid to the first part of the C4-C8 branched-chain fatty acid is 1: (0.5-1.5): (0.5-0.8): (0.5-1.0); and the molar ratio of the pentaerythritol to the second part of C4-C8 branched chain fatty acid is 1: (1.2-2.2). The refrigerating machine oil has good intermiscibility with an R32 refrigerant.

The invention relates to the technical field of preparation of pesticide chemical intermediates, and relates to a co-production preparation method of nitryl-containing aromatic aldehyde and aromatic acid. Comprising the following steps: 1, carrying out a chlorination reaction on a methyl aromatic compound and chlorine to synthesize a mixture A; 2, carrying out nitration reaction on the mixture A and nitric acid to synthesize a mixture B; step 3, carrying out hydrolysis reaction on the mixture B to obtain a mixture C; 4, the mixture C is subjected to alkali washing and layering, the upper layer is subjected to aftertreatment to obtain nitryl-containing aromatic aldehyde, and the lower layer is subjected to pH adjustment to obtain nitryl-containing aromatic acid. The method belongs to a continuous process, and is safe and efficient; rectification separation of benzyl dichloride and benzyl trichloride is not needed, so that the energy consumption is greatly reduced; the nitryl-containing aromatic acid produced in the method is also a key intermediate of a pesticide product saflufenacil, the two intermediates can be separated only through layering, the operation is simple, the overall yield is greatly improved, and the raw material utilization rate is high.

This application relates to a corrosion inhibitor for coolants, a method for preparing the same, and a coolant. The corrosion inhibitor comprises: 1 wt% to 5 wt% fatty acid, 0.05 wt% to 0.5 wt% aromatic acid, 0.1 wt% to 1.0 wt% benzotriazole derivative, and 0.1 wt% to 1.0 wt% additives. The benzotriazole derivative has the structural formula shown in Formula I below. In Formula I, R1 to R4 are each independently selected from at least one of fluorine, substituted or unsubstituted C1 to C5 alkyl groups. When substituted, the substituent is selected from fluorine. The corrosion inhibitor for coolants provided in this application, comprising a benzotriazole derivative, can form stable coordination bonds with metal ions in the coolant, thereby reducing the flow resistance of the coolant while improving its corrosion inhibition performance.

This invention discloses a nickel oxide-doped manganese dioxide catalyst, its preparation method, and its application. The catalyst is prepared by in-situ growth of nickel oxide-doped manganese dioxide on a carbon felt substrate using a solvothermal method. In the application, the catalyst electrode is used as the anode, and an aromatic compound is dissolved in an acidic solution as the anolyte. A counter electrode is used in the cathode chamber, and an acidic solution is used as the cathode reaction solution. After the reaction, an aromatic aldehyde or aromatic ketone can be obtained through a post-treatment process. The catalyst of this invention has a high surface area and porous structure, which increases the specific surface area of ​​the electrode, providing a large number of reaction sites and active sites for the oxidation of the substrate. In addition, the doping of nickel oxide provides more active sites for manganese dioxide, promoting the formation of intermediates and also promoting the desorption of the aromatic aldehyde product, preventing the formation of aromatic acids due to over-oxidation. Furthermore, the nanorod-like three-dimensional structure of the catalyst is beneficial for mass transfer.

The present application provides a photosensitive resin composition, a photosensitive resin layer manufactured using the photosensitive resin composition, and a color filter including the photosensitive resin layer, wherein the photosensitive resin composition includes: (A) a colorant including a dye having a core-shell structure; (B) a binder resin; (C) a photopolymerizable compound; (D) a photopolymerization initiator; and (E) a solvent, wherein the core is an aromatic acid cyanine compound and the shell is represented by Chemical Formula 1. In Chemical Formula 1, each substituent is the same as defined in the specification. The present application can improve the durability of the color filter and have high brightness and high contrast ratio. [Chemical Formula 1]

The application discloses a C-19 modified isosteviol derivative and a preparation method and application thereof, aims to provide an isosteviol derivative with a heart protection activity, transforms a C-19 position of isosteviol, converts a C-19 position carboxyl into a primary amine or isocyanic acid by using a Curtius rearrangement, and further modifies the primary amine to introduce a fatty acid, aromatic acid fragment to convert into an amide fragment, or converts the isocyanic acid into a urea fragment, obtains a series of novel nitrogen-containing isosteviol derivatives by a strategy of reducing one carbon atom, and the nitrogen-containing isosteviol derivatives show good heart protection activity on a zebra fish model of myocardial injury, and can be used for preparing heart protection drugs, and the application relates to the technical field of medicines.

The invention discloses a catalyst for synthesizing dimethyl isophthalate as well as a preparation method and application of the catalyst, and belongs to the technical field of preparation of dimethyl isophthalate. The preparation method disclosed by the invention comprises the following steps: S1, adding a carbohydrate compound and a pore-forming agent into water, and carrying out rotary evaporation to obtain a mixed solid; s2, carbonizing the mixed solid to obtain a porous carbon-based carrier; s3, putting the porous carbon-based carrier, a sulfonating agent and water into a reaction kettle, and sulfonating to obtain the catalyst. When the catalyst obtained through the method is used for preparing dimethyl isophthalate, generation of by-products can be reduced, emission of waste water, waste gas and waste residues can be reduced, meanwhile, the strong acid corrosion risk is avoided, the green chemistry principle is met, and an environment-friendly solution is provided for production of aromatic acid ester compounds.

The invention relates to a synthesis method for preparing an alpha-deuterated amine compound in the technical field of medicines, and belongs to the technical field of chemical pharmacy. The invention particularly relates to a synthesis method of an alpha-deuterated amine compound shown as a formula I. The general formula of the alpha-deuterated amine compound is as shown in a formula I in the specification. The alpha-deuterated amine compound is generated by taking corresponding amine as a substrate, thiol as a catalyst, heavy water as a deuterium source, aromatic acid ester as an additive and esters as a reaction solvent under light irradiation. The compound can be used for drug development or synthesis of other types of deuterated molecules. # imgabs0 #

The present invention relates to a method for manufacturing a polyimide film and a polyimide film manufactured thereby. In one embodiment, the method for preparing a polyimide film includes: preparing a polyamic acid by polymerizing a mixture containing an aromatic diamine and an aromatic acid dianhydride: preparing a first composition containing the polyamic acid, an amine-based catalyst, an acid anhydride-based dehydrating agent, and a solvent; and forming a polyimide film at 150° C. or less using the first composition, wherein the first composition contains the amine-based catalyst and the acid anhydride-based dehydrating agent in a molar ratio of 1:2 to 1:5.

The invention belongs to the field of medicinal chemistry, and particularly relates to ligustrazine stilbene polyphenol aromatic acid ether compounds, pharmaceutically acceptable salts thereof, a preparation method thereof, a pharmaceutical composition and an application of the ligustrazine stilbene polyphenol aromatic acid ether compounds. The ligustrazine stilbene polyphenol aromatic acid ether compound and the pharmaceutically acceptable salt thereof have a remarkable anti-platelet aggregation effect, and can be used for preparing drugs for resisting platelet aggregation, preventing or treating cardiovascular diseases or treating or preventing thromboembolic diseases.

The present invention discloses a recyclable supramolecular nanofiber composite membrane and a preparation method and application thereof, belonging to the technical field of self-assembled nanomaterials. Specifically, the following steps are included: a nitrogen-containing heterocyclic compound is reacted with an aromatic acid to form a eutectic, and a heat-induced precursor crystallization method is used to self-assemble the powdered eutectic and the nanomaterial in a solvent to form a composite supramolecular nanofiber. The composite supramolecular nanofiber is a new type of flexible self-assembled structural material, which can be used for air purification after film formation, and can be closed-loop recovered and recycled by a convenient dissolution recrystallization method. The supramolecular nanofiber composite membrane of the present invention can also be used as a flexible substrate or a substitute for traditional nonwoven materials.

The present invention relates to a mixture, blend or combination, comprising at two, preferably at least three, chosen from the following compounds: (A) a pyrone derivative, (B) a tropolone derivative, (C) a phenylpropanoid, (D) a monoterpene or monoterpenoid, (E) an aromatic acid or salt, (F) a dipeptide, and (G) an alkanediol, and its use as chelating mixture.

The utility model discloses an oxidation reaction kettle for preparing aromatic acid by oxidizing aryl methyl. The oxidation reaction kettle comprises a kettle body, a stirring system, a cooling coil, an oxygen inlet system and a safety system, the oxygen inlet system comprises an oxygen inlet device, a nitric oxide detector and a control system; the control system is composed of a transmitter, a comparator, a controller and an actuator which are sequentially connected through wires. The transmitter is connected with the nitric oxide detector, and the actuator is connected with the air inlet valve; the safety system comprises a safety valve and a rupture disk device. According to the oxidation reaction kettle disclosed by the utility model, oxygen is introduced into the oxidation reaction kettle through the oxygen inlet system, so that the generated by-product gas nitric oxide is oxidized into nitrogen dioxide, and the nitrogen dioxide reacts with water to generate nitric acid, so that the utilization rate of the nitric acid is increased, the material consumption is reduced, and the production cost is reduced; and safety risks such as unstable temperature and pressure caused by frequent exhaust of a reaction system are reduced.

The invention provides a metallic nickel suspension and a preparation method thereof, a coating and an adhesive tape, and relates to the technical field of nickel suspensions. The metal nickel suspension liquid is prepared from the following raw materials in parts by weight: 100 parts of acrylate, 8 to 20 parts of nickel powder, 0.5 to 1 part of carboxyl aromatic acid compound and 0.5 to 1 part of halogenated alkyl bromide. A carboxyl aromatic acid compound and halogenated alkyl bromide (organic halide) are subjected to an electrophilic cross-coupling reaction under the action of nickel to prepare amphoteric macromolecules, an electrophilic group extends to a metal nickel phase, an electron donating group extends to an acrylate solution, so that the surface tension of nickel powder is reduced, and meanwhile, different micelles are kept relatively stable and independent; and the nickel powder can be integrally dispersed to form fine particle liquid drops, so that the nickel powder is stably suspended in the acrylate solution.