138 results about "M-aminophenol" patented technology

The invention discloses a fluorescence ratio type carbon dot hydrogel sensor, a preparation method thereof and application of the fluorescence ratio type carbon dot hydrogel sensor in rapid detection of doxorubicin hydrochloride. The invention discloses a fluorescence ratio type carbon dot hydrogel sensor which is characterized in that 3-aminophenol is used as a carbon source, absolute ethyl alcohol is used as a solvent, carbon dots are prepared through a one-step solvent method, the carbon dots have green fluorescence, agarose is dissolved in a mixed solution of deionized water and a phosphate buffer solution to be fully dissolved, and then the carbon dots are prepared into the fluorescence ratio type carbon dot hydrogel sensor. And adding the carbon dots into the mixed solution, fully dispersing, and cooling to obtain the fluorescence ratio type carbon dot hydrogel sensor. The sensor disclosed by the invention has the characteristics of high selectivity and high sensitivity when being used for detecting doxorubicin hydrochloride, and also has the characteristics of convenience, visibility, rapidness, portability, easiness in operation and the like.

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.

The invention discloses a method for synthesizing p-aminophenol through electrolytic reduction, which comprises the following steps: carrying out electrolysis by adopting a diaphragm electrolytic cell and taking an oxidation reaction of hydrogen as an anode reaction, taking a reduction reaction of nitrobenzene as a cathode reaction, taking a sulfuric acid aqueous solution as an anode liquid and taking an aqueous solution containing nitrobenzene and sulfuric acid as a cathode liquid, and recycling an electrolysis product in the cathode liquor to obtain the p-aminophenol. According to the invention, the oxidation reaction of hydrogen is used as the anode reaction, a membrane electrode or a gas diffusion electrode is preferably used as the anode, and an iridium oxide anode and a lead anode are not used, so that the cost is effectively reduced or pollution is avoided; the electrolytic reaction is carried out under the condition that the pressure intensity of the anode chamber is not lower than that of the cathode chamber, the electrolytic voltage is reduced by about 1.6-2.3 V (compared with an iridium oxide anode), the energy consumption is obviously reduced, and the yield of p-aminophenol is improved by about 10%.

The invention relates to the technical field of building materials, in particular to a method for preparing high-strength flow-state solidified soil by utilizing industrial solid waste, which comprises the following steps: taking industrial solid waste mixed materials such as steel slag, mineral powder, ardealite, carbide slag and the like as a curing agent, taking redundant soil as raw material soil, taking modified coconut fiber as a reinforcement material, and introducing a composite tackifier to prepare the high-strength flow-state solidified soil. The preparation method comprises the following steps: firstly, epoxidizing coconut shell fibers, and then performing one-pot reaction on the epoxidized coconut shell fibers, branched polyethyleneimine and triglycidyl p-aminophenol to obtain amino-terminated hyperbranched coconut shell fibers serving as modified coconut shell fibers; vinyl-terminated epoxy organic silicon, isopentenol polyoxyethylene ether, N, N-dimethylacrylamide and acrylic acid are used as raw materials to synthesize the composite tackifier, so that the durability of the fluid-state solidified soil is greatly improved.

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 utility model discloses a p-aminophenol catalyst circulating device, and particularly relates to the technical field of catalyst circulating production, which comprises a fixed box, a heating mechanism is arranged in the fixed box, a feeding box is arranged at the top of the fixed box, a feeding cylinder is arranged at the top of the feeding box, and a discharging cylinder is arranged at the bottom of the fixed box. A feeding mechanism is arranged in the feeding cylinder and comprises a feeding pipe arranged at the top of the feeding cylinder, a filter screen is arranged at the bottom of the feeding cylinder, a motor is arranged on one side of the feeding box, the output end of the motor is coaxially in transmission connection with a rotating shaft, and the rotating shaft is sleeved with a movable plate. Wherein a sealing ring is arranged on the surface of the movable plate, a sealing ring is arranged on one side of the movable plate, and an infrared sensor is arranged at the top of the sealing ring. According to the utility model, cyclic utilization of a catalyst and accurate control of reaction conditions can be realized, so that a powerful guarantee is provided for long-term stable operation of the device.

Compositions comprising oils of plant or animal origin, such as fatty acid alkyl esters, are stabilized against oxidation using oxidized aminophenol antioxidants. The aminophenol includes one or two carbon-containing groups including hydroxyl groups and / or ether groups separated from an N atom by one or more carbon atoms. The oxidized aminophenol antioxidants effectively control oxidation in moderate and even low amounts, can be used in a variety of different oil and fatty acid methyl ester formulations, and are effective at elevated temperatures, and exhibit significantly superior performance to conventional antioxidants.

Disclosed are a resin substrate-based iron oxyhydroxide desulfurizing agent and a preparation method therefor, falling within the technical field of gas purification and treatment. In the present disclosure, sodium percarbonate is used as a raw material to prepare iron oxyhydroxide. Sodium percarbonate serves both as an alkaline precipitant and as an oxidant. P-aminophenol and formaldehyde are subjected to condensation polymerization to form linear phenolic resin, which is then modified with terephthalyl alcohol to connect into a cross-linked network structure resin. The resin is used as a substrate to obtain the resin substrate-based iron oxyhydroxide desulfurizing agent. The preparation method of the present disclosure is simple and achieves a larger sulfur capacity and desulfurization efficiency, making it suitable for the removal of hydrogen sulfide from waste gas.

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.

This invention provides a polymer type conductive paste that can provide a highly reliable conductive layer even in high humidity environments. The polymer type conductive paste in accordance with the embodiment of the present invention contains conductive metal powder, binder resin, organic solvent, and specific additives, wherein said binder resin is polyvinyl butyral resin, wherein said specific additives are one or more selected from the group consisting of stearic acid, lauric acid, octadecyl butanedioic acid, benzoic acid, acetamidophenol, aminophenol, catechol, and N,N-bis(2-hydroxyethyl) coco alkylamine, and wherein said specific additives are contained at the content of not less than 0.01 parts by mass and not more than 3.0 parts by mass per 100 parts by mass of said conductive metal powder.

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%.

To provide a method for producing a pultruded molding, capable of reducing the pultrusion force both before and after curing in a mold, and yielding a pultruded molding with excellent appearance and dimensional precision.SOLUTION: A method of producing a pultruded molding, the method including curing a material that contains components (A)-(D) and meets conditions (I) and (II). [Components] (A) carbon fiber; (B) an epoxy base agent selected from bisphenol A type and bisphenol F type; (C) an epoxy base agent selected from aminophenol type, novolac type, and aliphatic ether type; (D) at least one epoxy curing agent selected from cyanamide type and alicyclic amine type. [Conditions] (I) the volumetric expansion ratio V80 / V25, when the mixture of (B) and (C) is heated from 25°C to 80°C, satisfies a predetermined relational expression; (II) the viscosity increase ratio of the mixture of (B), (C), and (D) after 90 minutes at 25°C is 1.80 times or less.SELECTED DRAWING: None

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.