98 results about "M-aminophenol" patented technology

The invention belongs to the technical field of sensors, and relates to an array sensor based on cerium-based metal organic framework nano-enzyme and detection application of perfluoroalkyl compounds. The array sensor is a Ce-MOF triple enzyme activity array sensor and is provided with a plurality of mutually independent sensing channels; the sensing channel contains a Ce-MOF nano enzyme and a chromogenic substrate; the chromogenic substrates comprise a first chromogenic substrate, a second chromogenic substrate and a third chromogenic substrate, the first chromogenic substrate comprises 3, 3 ', 5, 5'-tetramethyl benzidine, the second chromogenic substrate comprises 2, 4-diaminophenol and 4-aminoantipyrine, and the third chromogenic substrate comprises xanthine, purine oxidase and nitrogen blue tetrazole. The MOF nano-enzyme array sensor constructed by the invention has relatively high sensitivity and selectivity in identification and distinguishing of PFASs compounds, not only can accurately distinguish single PFASs compounds, but also can perform quantitative detection, and has good response to PFASs with different concentrations.

This invention discloses a weather-resistant, high-hardness composite anti-corrosion coating and its preparation method, belonging to the field of anti-corrosion coating technology. The preparation method includes: firstly, synthesizing an epoxy resin containing dynamic disulfide bonds by reacting dithiodibenzoic acid and epichlorohydrin in an alkaline aqueous phase; secondly, constructing a low surface energy siloxane network using hydroxyl-terminated polydimethylsiloxane and methyltriethoxysilane; subsequently, introducing chlorzoxazone and N-acetyl-p-aminophenol as composite organic corrosion inhibitors, blending them with the resin to obtain a composite base material; finally, adding graphene, carbon nanotubes, and inorganic anti-corrosion fillers, and cross-linking and curing to form a film using a polyamine curing agent. This invention suppresses microcracks through the dynamic stress relief of disulfide bonds, combined with the weather-resistant barrier of the siloxane network, the active interface passivation of the heteroatom corrosion inhibitor, and the three-dimensional synergistic mechanical bonding of carbon-based nanomaterials, achieving a perfect unity of ultra-strong corrosion resistance, excellent weather resistance, and high mechanical hardness in the coating.

The invention discloses a synthesis method of 5-nitro-2-aminophenol, which comprises the following steps: by using 2-chloro-4-nitroaniline as a raw material, providing an amino protecting group by using di-tert-butyl dicarbonate ester to obtain a compound 3; carrying out hydrolysis reaction in an alkaline environment to hydrolyze chlorine groups on benzene rings into hydroxyl groups to obtain a compound 4; and removing an amino protecting group under an acidic condition to obtain the 5-nitro-2-aminophenol. According to the method, 2-chloro-4-nitroaniline is used as a starting raw material, compared with expensive ortho-aminophenol, the cost of the raw material can be remarkably reduced, use of expensive catalysts in the hydrolysis process is avoided through amino protection, generation of the byproduct 2-amino-4-nitrophenol is effectively reduced, and the yield of the 2-chloro-4-nitrophenol is increased. And the synthesized 5-nitro-2-aminophenol has relatively high purity (99.5%) and relatively high yield (-86%). The method has the advantages of conventional production steps and conventional process equipment, and has a good application prospect.

The invention provides a catalyst component for olefin polymerization, a preparation method and application of the catalyst component, a catalyst containing the catalyst component and used for olefin polymerization and application of the catalyst. The catalyst component comprises a reaction product of a sulfur-containing magnesium compound as shown in a formula (I), a titanium compound and an internal electron donor compound, in the formula (I), R1 is selected from C1-C8 alkyl groups or C3-C8 cycloalkyl groups; r2 and R3 are the same or different and are independently selected from hydrogen or C1-C5 alkyl groups, and hydrogen on the alkyl groups can be optionally substituted by halogen atoms; x is halogen, preferably chlorine or bromine; m ranges from 0.1 to 1.9, n ranges from 0.1 to 1.9, and m + n = 2, 0lt; q < = 0.5; the internal electron donor compound comprises a 1, 3-diether compound and an aminophenol compound. When the catalyst component for olefin polymerization provided by the invention is used for olefin polymerization, the hydrogen regulation sensitivity is relatively low, the stable control of the melt index of the product is facilitated, and the melting point of the prepared polymer product is lower.

The present invention is a preparation method and application of N-Carbon@Ag-void@SiO2 egg yolk-eggshell structure nanocatalyst. The method first prepares 3-aminophenol formaldehyde resin microspheres@SiO2 core-shell structure nanoparticles, and then, the Ag in the medium + Through the SiO2 shell, it contacts with the amino groups on the surface of 3-APF and converts Ag into + The Ag nanoparticles are then in situ reduced to Ag nanoparticles and fixed to the 3-APF surface. Finally, the Ag-loaded 3-APF@Ag@SiO2 core-shell nanoparticles are carbonized. Due to the coordination between the Ag nanoparticles and the nitrogen atoms on the core, the Ag nanoparticles migrate as the core shrinks during carbonization, ultimately forming the N-Carbon@Ag-void@SiO2 yolk-eggshell nanocatalyst. This method eliminates the complex template removal process, resulting in a simple, low-cost method suitable for large-scale preparation.

The invention relates to the field of optical fiber ribbons, and discloses a high-fiber-density windable optical fiber ribbon and a preparation method thereof.The high-fiber-density windable optical fiber ribbon comprises a plurality of optical fibers arranged side by side and a photocuring product of a bonding resin composition, the bonding resin composition comprises modified epoxy acrylate, a photoinitiator, a reactive diluent and a modified multi-walled carbon nanotube; the modified epoxy acrylate is prepared by polymerizing a hydroxyl-terminated intermediate prepared by reaction of 4-hydroxy-3-trifluoromethyl benzaldehyde and 4-aminophenol with a silicon-containing epoxy group intermediate to prepare hyperbranched epoxy resin, and introducing acrylic acid for reaction; the silicon-containing epoxy group intermediate is prepared by reacting phenyl tri (dimethyl siloxane) silane with allyl glycidyl ether; and the modified multi-walled carbon nanotubes are prepared by carrying out chemical silver plating on the multi-walled carbon nanotubes by adopting a silver ammonia method. The optical fiber ribbon prepared by the invention has good mechanical properties, high-temperature and high-humidity resistance, antistatic property and flame retardance.

The invention relates to the technical field of electrochemical materials, and particularly discloses Mo2C loaded N and P co-doped carbon nanospheres as well as a preparation method and application thereof. The preparation method comprises the following steps: by taking 3-aminophenol-formaldehyde phenolic resin nanospheres as a carbon precursor, forming a uniform Mo-EDTA (Ethylene Diamine Tetraacetic Acid) complex by utilizing a polydentate coordination effect of EDTA on Mo ions; when one-step carbonization is carried out in an inert atmosphere, EDTA serves as a molecular cage to inhibit Mo2C nano-particle agglomeration and realize monodisperse anchoring, and N and P sources are released in situ to complete double-heteroatom uniform doping. The catalyst shows excellent catalytic performance in a water electrolysis hydrogen production performance test: in a 1M KOH electrolyte, when the current density is 10mA / cm < 2 >, the overpotential is less than or equal to 80mV, and the Tafel slope is 95-105mV / dec. The long-term stability is good, hydrogen evolution is continuously conducted for 23 h under the current density of 50 mA / cm < 2 >, and the current retention rate is larger than or equal to 90%.

The application discloses an acid-resistant non-noble metal catalyst and a preparation method and application thereof, and particularly relates to the field of acid-resistant metal catalysts, and the preparation method of the acid-resistant non-noble metal catalyst comprises the following steps: step 1, preparation of a carrier; step 2, modification of the carrier; step 3, preparation of an impregnation solution; step 4, preparation of an unactivated catalyst; step 5, activation of the catalyst; and step 6, functionalization of the catalyst. The acid-resistant non-noble metal catalyst prepared by the application can be applied to the synthesis of p-aminophenol from nitrobenzene. The catalyst has good acid resistance and stability, and when applied to the process of preparing p-aminophenol by rearrangement of nitrobenzene hydrogenation, the catalyst has high activity and high selectivity of p-aminophenol under relatively mild reaction conditions, the production conditions are improved, the production cost is reduced, and the product quality is improved.

The invention belongs to the technical field of electrolytic synthesis, and particularly relates to a method for synthesizing p-aminophenol and persulfate. According to the application, a cathode electrocatalytic reduction synthesis process of p-aminophenol and an anode electrocatalytic oxidation synthesis process of persulfate are innovatively coupled, and the cathode current efficiency in the preparation process of p-aminophenol is effectively improved by regulating and controlling anode electrocatalytic temperature parameters. Performance test results show that the cathode current efficiency can reach 81.3%-89.82%, and compared with the cathode current efficiency of 80% or below in a conventional p-aminophenol preparation process, the technical breakthrough exceeding the expectation is achieved, and the unexpected technical effect is shown.

The invention relates to the technical field of laboratory waste treatment, in particular to a method for preparing alumina-based magnesium aluminate spinel by recycling laboratory waste. The waste recycling device is used for solving the problems of environmental pollution and resource waste caused by waste materials generated in existing laboratories. The method comprises the following steps of: settling and drying the waste material, grinding the waste material, high bauxite, biphenyl aminophenol aldehyde epoxy resin and niobium pentoxide, and calcining to form alumina-based magnesium aluminate spinel; the preparation method comprises the following steps: carrying out nucleophilic substitution reaction on 4, 4 '-biphenyl dimethyl dimethyl ether and 4-aminophenol to prepare an intermediate product 1, and carrying out nucleophilic ring opening and polymerization reaction on the intermediate product 1 and epoxy chloropropane to generate the biphenyl aminophenol aldehyde epoxy resin. According to the method, environmental pollution caused by direct discharge of waste materials is avoided, the production cost is reduced, cyclic utilization of resources is realized, ecological damage caused by raw material exploitation can be reduced, and the method has a remarkable environmental protection effect.

The invention discloses 2-((4-aminopyridine-2-yl) amino)-4-methylphenol as well as a synthesis method and application thereof, 2-bromo-4-methylphenol and 4-nitropyridine-2-amine are taken as raw materials, and an intermediate 4-methyl-2-((4-nitropyridine-2-yl) amino) phenol is obtained through condensation reaction; and reducing the intermediate under the action of ammonium formate and a catalyst to obtain the 2-((4-aminopyridine-2-yl) amino)-4-methylphenol. The method is simple and convenient to operate, mild in operation condition and high in reaction rate, the obtained product is high in purity and yield, the dispersity and antistatic performance of the insoluble sulfur can be improved, and the method is suitable for industrial mass production.

The invention discloses a production method of a high-temperature-resistant lithium battery base membrane. The lithium battery base membrane is prepared from PA6, PA10T / 66, magnesium hydroxide, glass fibers, zinc borate, an antioxidant, silane coupling agent modified silicon dioxide and a DOPO-triglycidyl p-aminophenol reaction product. The high-temperature-resistant lithium battery base membrane designed by the invention not only has excellent high-temperature resistance, but also has good mechanical properties.

The invention provides an olefin polymerization catalyst carrier as well as a preparation method and application thereof. The olefin polymerization catalyst carrier comprises a composition shown in a formula (I), and in the formula (I), R1 is selected from C1-C14 alkyl groups or C3-C14 cycloalkyl groups; r2 and R3 are the same or different, and are respectively and independently selected from H, C1-C5 alkyl or C1-C5 halogenated alkyl; x is selected from halogen; m is 0.1-1.9, n is 0.1-1.9, and m + n = 2; c1 is selected from aminophenol compounds, 0 lt; q < = 0.5. The carrier is good in morphology, particles are not adhered, the carrier is in a good spherical shape, the particle size of the particles is small, and the particle size distribution is narrow. The catalyst prepared by adopting the carrier to carry out titanium loading has better catalytic activity and ethylene copolymerization capability when being used for olefin polymerization, is sensitive to hydrogen response, and can be used for preparing polymer products with higher bulk density.

Combination for Dyeing Keratin Fibers and its Use. The present invention relates to a dye combination comprising: A) a dye composition a), comprising: I) a coloring composition i), comprising: i) at least one oxidizing dye; wherein the oxidizing dye comprises one or more oxidizing bases selected from the group consisting of para-phenylenediamines, bis(phenyl)alkylenediamines, para-aminophenols, meta-aminophenols, ortho-aminophenols, and addition salts thereof, and mixtures thereof; and / or wherein the oxidizing dye comprises one or more couplers selected from the group consisting of meta-phenylenediamines, meta-aminophenols, and addition salts thereof, and mixtures thereof; and B) a pyrazolidine-3,5-dione compound of formula (1): (1). Figure for abstract: None

The invention relates to the technical field of fluorescent dye preparation, in particular to an organic fluorescent dye and a preparation method thereof.The preparation method comprises the following steps that m-diethylaminophenol and Meldrum's acid are catalyzed in an ethanol-water solvent through a supported catalyst and stirred to react in an oil bath, and an intermediate is obtained through acidification crystallization after cooling; and heating the intermediate, anhydrous potassium carbonate and ethyl iodoacetate in N, N-dimethylformamide under the protection of nitrogen to carry out alkylation reaction, and carrying out recrystallization, saponification hydrolysis and purification on the reaction liquid to obtain the organic fluorescent dye coumarin 343. The supported catalyst prepared by the invention shows good catalytic performance, stability and recoverability in the preparation reaction of the organic fluorescent dye.

Polymers formed by the condensation of bis(hydroxycarbyl)-aminophenol compounds with aldehydes are disclosed. The condensation polymers include one or more repeating units having bis(hydroxycarbyl)amino functionality. The polymers are useful as antifouling agents, polymerization inhibitors, rheology modifiers, dehaze agents, polymerization retarders, surfactants, or combinations thereof in one or more industrial process streams.

The invention discloses 4, 4 '-(propane-2, 2-diyl) bis (2-((4-aminopyridine-2-yl) amino) phenol) as well as a synthesis method and application of the 4, 4'-(propane-2, 2-diyl) bis (2-((4-aminopyridine-2-yl) amino) phenol). The preparation method comprises the following steps: by taking 4, 4 '-(propane-2, 2-diyl) bis (2-bromophenol) as a raw material, carrying out step-by-step substitution reaction to obtain an intermediate 4, 4'-(propane-2, 2-diyl) bis (2-((4-nitropyridine-2-yl) amino) phenol), and reducing the intermediate under the action of a catalyst and hydrazine hydrate to obtain the 4, 4 '-(propane-2, 2-diyl) bis (2-((4-aminopyridine-2-yl) amino) phenol). The method is high in production efficiency, short in production period, environment-friendly, simple and convenient to operate, high in product purity and high in yield, the solvent is convenient to recycle, the dispersity and the antistatic property of the insoluble sulfur can be improved, and the method is suitable for industrial mass production.

The application relates to application of a solid acid catalytic catalyst in preparation of p-aminophenol through nitrobenzene hydrogenation. The application comprises the following steps: adding a solid acid catalyst, cetyltrimethylammonium bromide, deionized water and nitrobenzene into a high-pressure reactor, and reacting under magnetic stirring for 0-24 hours at 25-150 DEG C to obtain the product p-aminophenol. The activated carbon for preparing the solid acid catalyst is coconut shell activated carbon, the series of activated carbon has the advantages of large specific surface area, rich micropores and strong adsorption capacity, and the coconut shell activated carbon solid acid with different acidities is prepared to catalyze the nitrobenzene hydrogenation reaction. The application avoids using traditional liquid acid sulfuric acid to provide the acidic active sites required by the reaction, greatly alleviates the problems of equipment corrosion, environmental unfriendliness, catalyst and product separation difficulty and the like. The catalyst used has good performance, the conversion rate of nitrobenzene is up to 100%, and the yield of p-aminophenol is up to 81.17%.

The invention relates to the technical field of photocatalysts, in particular to a nonmetal plasmon heterojunction material, a preparation method and application thereof and a method for preparing p-aminophenol through reduction of p-nitrophenol. The nonmetal plasmon heterojunction material provided by the invention comprises a C3N4 nanosheet and a WO3-x nanoplate (x is 0.1 to 0.3) positioned on the surface of the C3N4 nanosheet. The WO3-x local surface plasmon characteristic can effectively expand the spectral response range of the non-metal plasmon heterojunction material in a visible region to a near-infrared region, and the light absorption efficiency of the non-metal plasmon heterojunction material is remarkably enhanced. The nonmetal plasmon heterojunction material provided by the invention can realize efficient reduction of p-nitrophenol based on the synergistic effect of an interface heterojunction, a built-in electric field and oxygen vacancies, is high in selectivity, has excellent photocatalytic activity for reduction of p-nitrophenol, and is excellent in photocatalytic activity stability.

The application belongs to the technical field of sensors and relates to an array sensor based on cerium-based metal organic framework nanoscale enzyme and detection application of perfluoroalkyl compounds. The array sensor is a Ce-MOF triple enzyme activity array sensor and has multiple independent sensing channels. The sensing channels contain Ce-MOF nanoscale enzyme and chromogenic substrate. The chromogenic substrate includes first, second and third chromogenic substrates. The first chromogenic substrate includes 3,3',5,5'-tetramethylbenzidine. The second chromogenic substrate includes 2,4-diamino phenol and 4-aminoantipyrine. The third chromogenic substrate includes xanthine, xanthine oxidase and nitrogen blue tetrazolium. The MOF nanoscale enzyme array sensor constructed by the application has high sensitivity and selectivity in the identification and differentiation of PFASs compounds. The array sensor can not only accurately distinguish single PFASs compounds but also quantitatively detect the compounds, and has good response to PFASs with different concentrations.

The invention discloses water-soluble red light carbon dots (RCDs), a preparation method thereof and application of the water-soluble red light carbon dots in ammonia gas detection. The RCDs are prepared by taking 2, 4-diaminophenol hydrochloride as a single precursor, synthesizing through a one-step hydrothermal method and then dialyzing and purifying. The method is simple and low in cost. The particle size of the obtained RCDs is about 1.6 nm, the water solubility is good, and the emission wavelength is 610 nm. RCDs are loaded on filter paper to prepare the paper-based sensor, and after the sensor is in contact with ammonia gas, the fluorescence color (or R / G intensity ratio) of the sensor can generate specific change. According to the invention, the sensor is utilized to realize visual and quantitative detection of ammonia gas in a range of 1-100 [mu] M, and the anti-interference capability is strong. The whole detection process does not need complex instruments, and the method is suitable for on-site rapid detection of environmental monitoring, food freshness evaluation and the like.

The application discloses a synthesis method of a quick recovery photo-induced phase change imine compound, which is synthesized by a two-step method: in the first step, 4-amino phenol and 4-hydroxy-3-methyl benzaldehyde are used as raw materials, and a product obtained by a reductive amination reaction is used as a raw material for a second step reaction; in the second step, the reductive amination reaction product and 1-chloro undecane are used as reactants, and an alkyl substitution reaction is carried out to obtain 4-undecyloxy-N-[(3-methyl-4'-undecyloxyphenyl) methylene] aniline. The imine compound can realize a quick liquid-solid recovery process without any auxiliary means after photo-induced solid-liquid phase change, and the response capacity of the material is significantly improved.

The present disclosure provides for latent curing accelerators as well as compositions containing such a latent curing accelerator with a substance to be cured (e. g., an epoxy resin). The latent curing accelerators comprise an aminophenol and an encapsulant system having a polyphenol resin and optionally an acrylic resin. Methods of making and use are further provided.

This invention belongs to the field of sodium-ion battery technology, specifically relating to a nitrogen-doped hard carbon material, its preparation method and application, a sodium-ion battery anode, and a sodium-ion battery. This invention uses aminophenol as a dopant, which introduces nitrogen (N) into the hard carbon material, increasing the interlayer spacing and facilitating sodium ion intercalation. Simultaneously, the introduction of N can regulate the defect structure of the hard carbon material, enriching sodium storage sites. Based on these reasons, the specific capacity and cycle performance of the final hard carbon material are improved.

The invention provides a preparation method of a non-foaming agent dependent type foaming material, which adopts a Schiff base product (HB-AP) as a precursor, and realizes the integration of foaming and material preparation through a high-temperature self-crosslinking reaction. The preparation method comprises the following steps: taking 4-hydroxybenzaldehyde and 4-aminophenol as raw materials, and reacting to obtain HB-AP; then, under the precise temperature control condition of 240-300 DEG C, the inherent high-temperature self-crosslinking characteristic of HB-AP is utilized, and the foaming material with a porous structure can be directly obtained without adding any chemical foaming agent. The method breaks through the dependence of a traditional foaming technology on a foaming agent, in-situ control of the foaming process is achieved through molecular design, the preparation process is simplified, and the environmental problem caused by foaming agent residues is avoided. The obtained material has a uniform pore structure and high thermal stability, and has remarkable application advantages in the fields of thermal insulation and the like.

The application discloses a kind of wastewater treatment processes for p-aminophenol production, belong to p-aminophenol wastewater treatment technical field.First by graphene, anion exchange resin and hyperbranched polyether amine as raw material, prepared adsorption material, to wastewater is first step processing, reduce the content of TOC and metal ion, then through Fenton process second step processing, make hydrogen peroxide and ferrous ion reaction produce strong oxidizing hydroxyl radical, to attack difficult degradation organic matter chemical bond, and reduce COD in wastewater, reduce the harm to environment, finally into ceramic membrane filtration, ceramic membrane has good performance in wastewater treatment, by cross-flow filtration mode, can long-term stable in wastewater separation pollutant, complete p-aminophenol production wastewater treatment process.

The invention belongs to the technical field of nuclear pollution decontamination, and particularly discloses a strippable decontamination material with a uranium developing and tracing function as well as a preparation method and application of the strippable decontamination material with the uranium developing and tracing function. The strippable decontamination material is prepared by taking polyvinyl alcohol (PVA) and the like as film-forming base materials and 2-(5-bromo-2-pyridylazo)-5-diethylaminophenol (Br-PADAP) as a developing indicator; and an amphiphilic block copolymer PEA-b-PAA prepared by RAFT polymerization is innovatively adopted as a dispersing agent, so that the technical problems that Br-PADAP is poor in dispersity and easy to agglomerate in a water-based system are effectively solved. The material can be subjected to complexation reaction with uranium pollutants in the decontamination process, color change visible to naked eyes is generated, and visual tracing of a polluted area is achieved; meanwhile, the film-forming property is excellent, complete stripping can be achieved after curing, the decontamination rate on the surfaces of various base materials is all higher than 90%, and the detection limit on uranium can reach 0.81 * 10 <-6 > mol / cm < 2 >. The method is easy and convenient to operate, environmentally friendly and particularly suitable for rapid identification and removal of large-range uranium pollution in nuclear facility decommissioning and accident emergency.

The present application provides a polymer conductive paste which can obtain a conductor layer with high reliability even in a high humidity environment. The polymer conductive paste of the embodiment of the present application contains a conductive metal powder, a binder resin which is a polyvinyl butyral resin, an organic solvent, and a specific additive which is one or two or more selected from stearic acid, lauric acid, octadecenyl succinic acid, benzoic acid, acetylamino phenol, aminophenol, catechol, and N,N-bis(2-hydroxyethyl) cocoyl amine, and contains the specific additive in a range of 0.01 parts by mass or more and 3.0 parts by mass or less with respect to 100 parts by mass of the conductive metal powder.

The invention discloses sound-absorbing anti-electromagnetic wave glass and a preparation method thereof, and relates to the technical field of glass. The preparation method comprises the following steps: firstly, enabling 4-amino-2-ethoxy-5-nitrobenzoic acid, sodium nitrite, 2-tert-butyl-4-aminophenol and 2-amino-5-chlorobenzaldehyde to react to prepare an anti-ultraviolet agent, absorbing ultraviolet light energy by utilizing opening and closing of a chelate ring structure, and converting the ultraviolet light energy into heat energy to be released, so that the glass has an anti-ultraviolet effect; then preparing an anti-electromagnetic wave layer from the aminated indium tin oxide fibers, an anti-ultraviolet agent, pyromellitic dianhydride and 5-aminothiophene-2-formaldehyde, and enabling the glass to have an anti-electromagnetic wave effect through a multi-level electromagnetic loss structure and intensifying multiple reflection of electromagnetic waves; and compounding the anti-electromagnetic wave layer, the polyvinyl butyral film and the two layers of toughened glass to prepare the sound-absorbing anti-electromagnetic wave glass. The glass prepared by the invention has anti-electromagnetic wave and anti-ultraviolet effects.