21 results about "Hydroxynaphthalenes" patented technology

This application relates to the field of polishing slurry technology, and in particular to cerium oxide polishing slurry, its preparation method and application. The cerium oxide polishing slurry includes a solvent and a solute. The solvent includes water, and the solute includes cerium oxide, 4-sulfonylcalix[6]arene, sodium 2,3-dihydroxynaphthalene-6-sulfonate, a lubricant, a zwitterionic dispersant and a pH adjuster. In the cerium oxide polishing slurry, the mass percentage of cerium oxide is 4.0%~13.0%, the mass percentage of 4-sulfonylcalix[6]arene is 0.3%~1.3%, the mass percentage of sodium 2,3-dihydroxynaphthalene-6-sulfonate is 0.1%~1.0%, the mass percentage of lubricant is 0.1%~0.55%, and the mass percentage of zwitterionic dispersant is 0.3%~1.3%. The pH value of the cerium oxide polishing slurry is 3.8~4.2. Using the cerium oxide polishing slurry provided in this application reduces the formation of Ce-Si-O that is difficult to clean during the polishing process and improves the cleaning yield and stability after polishing.

The invention provides a negative photosensitive resin composition which can obtain a cured film with high visible light shielding property even if a colorant such as carbon black is reduced. The invention also provides a cured film and a resist film. A negative photosensitive resin composition containing the following components (A)-(C): (A) a novolac phenolic resin in which the molar ratio [(a1): (a2): (a3): (a4)] of a structural unit (a1) derived from cresol, a structural unit (a2) derived from dihydroxynaphthalene, a structural unit (a3) derived from benzaldehyde, and a structural unit (a4) derived from salicylaldehyde is 1: (0.25-4.0): (0.25-4.0): (0.25-4.0); (B) a photosensitizer; and (C) an organic solvent.

This invention belongs to the technical field of drilling fluid filtration loss reducers, specifically relating to a hydroxynaphthalenesulfonic acid-modified cellulose drilling fluid filtration loss reducer, its preparation, and its application. The filtration loss reducer comprises hydroxynaphthalenesulfonic acid-modified cellulose; the cellulose is a carboxyl-modified cellulose; the monomeric structural formula of the hydroxynaphthalenesulfonic acid or hydroxynaphthalenesulfonate is shown below: The structural formula includes at least one -OH group at each position except for the sulfonic acid group. The filtration loss reducer exhibits excellent thermal stability, withstanding temperatures up to 200℃; strong resistance to salt and calcium / magnesium; effectively increasing drilling fluid viscosity, reducing filtration loss, and improving mud cake quality; inhibiting clay dispersion, controlling formation mud production, and ensuring drilling fluid cleanliness; reducing wellbore enlargement, which is beneficial for protecting oil and gas reservoirs. It is particularly suitable for seawater drilling fluid systems, and deep and ultra-deep well drilling fluid systems.

This invention provides a water nitrate detection reagent, its preparation method, and a method for detecting nitrates in water. The raw materials for preparing the water nitrate detection reagent include chromogenic particles, a reducing agent, a diazotizing reagent, and an acid reagent. The chromogenic particles comprise dihydroxynaphthalenesulfonic acid compounds coated with an outer membrane, and the reducing agent comprises Cu / MnO with a three-dimensional porous nanostructure. X Mixture, where x≤2, Cu / MnO X The purity of the mixture is ≥98%, Cu and MnO X The mass ratio is 1:2 to 6. The acid reagent is a weak organic acid. Using this water nitrate detection reagent for water sample testing offers wide applicability, a broad measurement range, strong anti-interference ability, simple operation, high accuracy, and stable storage. It is suitable for rapid on-site determination of nitrate content in most water samples, including surface water, drinking water, kitchen waste (domestic sewage), and food industry wastewater.

This invention relates to an abrasive article comprising at least one binder in at least one abrasive layer. The binder contains at least one resin N, wherein the resin N is produced by a polymer formation reaction of a starting monomer composition, specifically by polycondensation, wherein the starting monomer composition comprises at least one B monomer or at least one B monomer and at least one A monomer, wherein the at least one A monomer is selected from the group consisting of phenol, catechol, catechol-like compounds, resorcinol, resorcinol-like compounds such as 1,3,5-trihydroxybenzene and phloroglucinol, 2,6-dihydroxynaphthalene, 1,8-dihydroxynaphthalene, 1,5-dihydroxynaphthalene, and flavonoids, and wherein the at least one B monomer is selected from the group consisting of aromatic aldehydes.

The application discloses a preparation method of a heat-resistant high-filling epoxy copper-clad plate material and belongs to the technical field of copper plate materials. After mixing boron nitride and carbon nanotubes, ball milling is assisted to peel and modify the surface by using glycine to obtain amino acid modified hybrid fillers; a trifunctional bio-based epoxy resin is synthesized by using trans-resveratrol as raw material; a multifunctional benzoic acid ester type active ester curing agent is prepared by reacting 1,6-dihydroxynaphthalene with benzoyl chloride. The amino acid modified hybrid fillers, the trifunctional epoxy resin, the multifunctional benzoic acid ester type curing agent and 2-ethyl-4-methyl imidazole are prepared into a high-filling impregnation liquid, a low-dielectric glass fiber cloth is impregnated, pre-cured, and then heat-pressed and cured in a vacuum condition in multiple temperature rising stages to obtain the copper-clad plate. The application effectively solves the technical problems of insufficient heat dissipation and large signal loss in the high-frequency and high-speed application of the traditional epoxy copper-clad plate.

The utility model discloses a kind of purification device of 2-hydroxy-6-naphthalene carboxylic acid, including pretreatment box and evaporator;Pretreatment box is arranged at evaporator side, and is connected by discharge pipe and the feed inlet of evaporator, filter mechanism for filtering treatment to raw material is arranged in pretreatment box, and filtered raw material flows into evaporator by discharge pipe;Filter mechanism includes filter frame and pollution discharge mechanism;Pretreatment box top is opened, and is capped by cover plate, filter frame is detachably installed in pretreatment box, feed pipe is extended to filter frame after being set on cover plate, and pollution discharge mechanism is set in filter frame, for discharging impurity in filter frame.The utility model has the advantages compared with prior art in that: by setting filter frame and pollution discharge mechanism, large particle impurities and other suspended solids in raw material liquid can be effectively removed, the design of pollution discharge mechanism makes the impurities in filter frame can be discharged in time, avoids that impurities accumulate in filter frame.

The application belongs to the technical field of flame retardants, and particularly relates to a surface modified bromide flame retardant and a preparation method thereof. The surface modified bromide flame retardant is prepared by using tetrabromobisphenol A glycidyl ether and 2,7-dihydroxynaphthalene as raw materials, and reacting under the action of a catalyst benzyltriphenylphosphonium bromide to obtain a high molecular weight brominated epoxy resin flame retardant. Then, the high molecular weight brominated epoxy resin flame retardant is modified and grafted by using cyclotriphosphazene modifier to obtain a surface modified high molecular weight brominated epoxy resin flame retardant. The high molecular weight brominated epoxy resin flame retardant is synthesized by using tetrabromobisphenol A glycidyl ether and 2,7-dihydroxynaphthalene, the naphthalene group introduced can greatly improve the thermal stability of the flame retardant, meanwhile, the high molecular weight brominated epoxy resin flame retardant is surface grafted and modified by using cyclotriphosphazene modifier, the cyclotriphosphazene with high efficient charring capacity is introduced, and the carbon layer produced in the process of playing the flame retardant role can improve the smoke problem of the brominated epoxy resin flame retardant.

The application discloses an environment-friendly degradable packaging material and a preparation method thereof, and belongs to the technical field of environment-friendly polymer materials. The environment-friendly degradable packaging material comprises polylactic acid, a synergistically modified structural object, 2,6-dihydroxynaphthalene, thermoplastic starch, nano-cellulose, epoxy soybean oil, a lubricant, an antioxidant and a compatilizer and the like. The synergistically modified structural object is a composite structure formed by synergistic modification of a tannic acid-induced cellulose hydrogen bond restructured structure and a urea flexible crosslinking network. By constructing a multiple synergistic enhancement system, the interface bonding capacity and the flexible and stable performance of the material are improved, the environment-friendly degradable packaging material prepared has excellent mechanical properties, moisture resistance stability, tear resistance and thermal stability, and simultaneously has good environment-friendly degradation performance, and can be widely applied to the fields of food packaging and environment-friendly packaging.

This invention discloses a 2-hydroxy-3-pinene-difluoroborane complex-based fluorescent probe for detecting H2S, its preparation method, and its application. The invention uses 2-hydroxy-3-pinene as a raw material and reacts it with 6-hydroxy-2-naphthaldehyde via an aldol condensation reaction to obtain compound DQ; compound DQ undergoes a complexation reaction with boron trifluoride-diethyl ether to obtain compound DQTY; compound DQTY undergoes a substitution reaction with 2,4-dinitrofluorobenzene to obtain the fluorescent probe DQTY-HS. Probe DQTY-HS specifically recognizes H2S. Upon addition of H2S to a DMSO / PBS (1:9, v / v) solution of DQTY-HS, the fluorescence color of the solution changes from colorless to yellow under 365 nm ultraviolet light irradiation, with a response time of 30 s and a detection limit of 50 nM. This probe has many advantages, such as simple synthesis, good selectivity, high sensitivity, good biocompatibility, and low toxicity, and has good application prospects in environmental analysis and food fields.

The application discloses a 1,4-dihydroxy-2-naphthoic acid-polyisoprene transferase mutant, a construction method and application thereof, and belongs to the technical field of biology. Eight 1,4-dihydroxy-2-naphthoic acid-polyisoprene transferase mutants which are significantly superior to wild-type enzymes in catalytic efficiency are obtained through rational design and screening, and a recombinant Escherichia coli based on the mutants is constructed, so that the yield of vitamin K2 produced by the whole cell catalysis of the constructed recombinant bacteria is more than 30% higher than that of a wild-type strain. The excellent catalytic performance of the menA mutant provided by the application provides strong technical support for the industrialized production of vitamin K2, and has wide application prospect and market value.

This invention relates to a perovskite solar cell and its fabrication method, belonging to the field of photovoltaic cell technology. The perovskite solar cell of this invention comprises a conductive substrate, a hole transport layer, a perovskite light-absorbing layer, a passivation layer, an electron transport layer, and electrodes; the passivation layer comprises 3-hydroxy-2-naphthoic acid. This invention forms a passivation layer on the perovskite light-absorbing layer using 3-hydroxy-2-naphthoic acid as a passivating agent, reducing the surface defect density of the perovskite light-absorbing layer while improving the interfacial energy level matching between the perovskite and charge transport layers, reducing the tolerance of the perovskite solar cell to external environmental factors, and improving the efficiency and stability of the solar cell.

This utility model relates to the field of reactor stirring technology, and more particularly to a bubbling stirred reactor for 2-hydroxy-3-naphthoic acid, comprising: a reactor body, a protective shell fixedly installed on the upper side of the reactor body, a control motor fixedly installed on the upper side of the protective shell, a reducer fixedly installed at the output end of the control motor, a rotating shaft fixedly installed at the output end of the reducer, three axial flow stirrers fixedly connected to the outer side of the rotating shaft, and a filling port fixedly connected to the upper side of the reactor body. This utility model utilizes a scraping structure to enable the scraping plate to scrape away coking material from the inner wall of the reactor body with the power of the rotating shaft, and a cleaning structure to clean the surface of the scraping plate during rotation.

The invention relates to a method of preparation of at least one monomer (MArx) from a product (P), wherein said monomer is selected in the group consisting of dihydroxybiphenyl (MAr1), 6-hydroxy 2-naphthoic acid (MAr2) and 4-hydroxybenzoic acid (MAr3) and / or a combination of (MAr2) with (MAr3) and wherein product (P) comprises at least one polyester (PE) and is based on a sequence of precipitations.

This invention discloses an outdoor signage energy-storage self-luminous material and its preparation method in the field of energy-storage self-luminous material technology. The energy-storage self-luminous material is a three-layer board, including a top layer, a middle layer, and a bottom layer. The raw materials, by mass percentage, include: 5%-45% dual-mechanism heat-sensitive luminescent powder; 50%-90% thermoplastic matrix; 0.1%-0.5% intelligent photothermal response additive; 4.0%-4.5% reinforcing filler; and 1.2%-2.5% weather-resistant protective component. The dual-mechanism heat-sensitive luminescent powder is composed of SrAl2O4:Eu... 2+ ,Dy 3+ Long afterglow powder and NaYF4:Yb 3+ Er 3+ After mixing with SiO2 upconversion powder, the mixture undergoes sequential chelation with 3-hydroxy-2-naphthoic acid-boronate, inorganic silicon-oxygen copolymerization, and fluorosilane crosslinking, followed by drying and curing. This invention, through the synergistic effect of multiple structures and components, comprehensively optimizes the luminescent properties, weather resistance, mechanical stability, and intelligent adaptability of outdoor signage materials, providing reliable technical support for the upgrading of outdoor signs such as road safety signs, highway signs, and tunnel emergency signs.

The application discloses a preparation method of 4-chloro-1-naphthol and belongs to the technical field of organic synthesis. 1-naphthol is used as a raw material to react with a deprotonation reagent, then reacts with a borate ester, and after acidification, 1-hydroxynaphthalene-2-boronic acid is generated; then, the 1-hydroxynaphthalene-2-boronic acid reacts with a chlorination reagent to obtain 4-chloro-1-hydroxynaphthalene-2-boronic acid; finally, the 4-chloro-1-hydroxynaphthalene-2-boronic acid reacts with an organic base under the action of copper sulfate to remove the boronic acid and generate 4-chloro-1-naphthol. In the application, 1-naphthol is used as a starting raw material, a boronic acid group is first introduced at the 2-position, so that chlorination reaction is positioned at the 4-position in the later stage, generation of ortho-position, polychlorinated by-products is effectively inhibited, the route is short, the operability is good, and the overall yield is high.

This invention belongs to the field of adsorption-photocatalytic materials technology, specifically relating to a dihydroxynaphthalene-type adsorption-photocatalytic covalent organic framework material, its preparation method, and its application. An imine-linked COF is synthesized using 4,4',4'',4'''-([9,9'-bicarbazol]-3,3',6,6'-tetramethyl)tetraphenylamine (BCTA) and 2,3-dihydroxynaphthalene-1,4-dicarboxymethyl (DDPD). The obtained dihydroxynaphthalene-type COF (BCTA / DDPD) exhibits good crystallinity and porosity, and can efficiently adsorb and photocatalytically reduce uranium in groundwater and seawater under visible light irradiation, achieving efficient separation and extraction of uranium.

The application discloses a synthesis method of 2-hydroxy-6-naphthalene carboxylic acid, and aims to solve the problems of low conversion rate of naphthol, harsh reaction conditions such as high temperature and high pressure and the like in the prior synthesis method of 2-hydroxy-6-naphthalene carboxylic acid. The synthesis method comprises the following steps: firstly, mixing beta-naphthol, isopropyl chloride, a first catalyst and an organic solvent to obtain 2-isopropoxy naphthalene; secondly, dissolving aluminum chloride in an organic solvent, adding chloromethane to obtain an alkylating agent; adding the alkylating agent into a 2-isopropoxy naphthalene solution to react at-10~0 DEG C to obtain an organic phase; thirdly, adding a second catalyst into the organic phase, and then introducing chlorine to carry out a photocatalytic reaction to obtain a reaction liquid; and fourthly, adding water into the reaction liquid, and heating to react to obtain a product. The beta-naphthol is used as a starting material, and 2-hydroxy-6-naphthalene carboxylic acid is synthesized through the processes of hydroxyl protection, methylation, photo-reaction chlorination and hydrolysis, the conversion rate is greater than 99%, and the reaction condition is mild.

The application discloses 1,5-dihydroxynaphthalene and a preparation method and application thereof. The application remarkably improves the efficiency of the 1,5-dihydroxynaphthalene through bentonite nucleation induction, and reduces the generation of by-products, and the purity of the obtained product can be up to 99.6%, and the yield reaches 90%. The method effectively solves the problems of difficult nucleation, many by-reaction products and the like in a traditional process. The application has a wide application prospect in the fields of dyes, medicines and high-performance materials and the like, and has the advantages of mild process conditions, simple operation and good repeatability, and is suitable for industrial production.