340 results about "M-aminophenol" patented technology

A lubricant composition suitable for fuel injected two-stroke cycle engines includes an oil of lubricating viscosity, an amount, sufficient to reduce or prevent piston scuffing, of a mixture of (A) at least one phenol selected from (A-1) an aminophenol and (A-2) a reaction product of a nitrophenol and an amino compound, and (B) at least one Mannich dispersant, amine dispersant, nitrogen-containing carboxylic dispersant, or ester dispersant. The composition further includes an amount, sufficient to reduce degradation of the lubricant composition upon exposure to oxygen or oxides of nitrogen, of a nitrogen-containing inhibitor, a hindered phenol inhibitor, or a sulfur-containing organic inhibitor.

The invention relates to a method for preparing a porous spherical manganese oxide / carbon compound. The method comprises the steps of: 1) adding a manganese oxide precursor of a certain concentrationinto a dispersion liquid of m-aminophenol formaldehyde resin spheres, stirring the mixture for several hours and then carrying out centrifugal separation on the mixture to obtain a m-aminophenol formaldehyde resin sphere / manganese oxide precursor compound; 2) placing the m-aminophenol formaldehyde resin sphere / manganese oxide precursor compound obtained in the step 1) into an oven, allowing it tostand for a period of time and then carrying out heat treatment thereon; 3) subjecting the m-aminophenol formaldehyde resin sphere / manganese oxide precursor compound after heat treatment to high temperature carbonization in a nitrogen atmosphere to obtain the porous spherical manganese oxide / carbon compound. Compared with the prior art, the method is simple and mild, the content of manganese oxidein the compound and the size of pores in the compound can be adjusted by changing the concentration of the manganese precursor, the equipment and process are simple, the cost is low, the cycle is short, and the yield is high.

The invention relates to a preparation method and application of a nanometer Cu-organic complex crystal, belonging to the technical fields of metal organic complexes, material science, nano-materials, chemical industry, catalysis and the like. According to the invention, cupric nitrate and 5-aminoisophthalic acid are used as main raw materials, and a metal organic complex gel method is employed to prepare the nanometer Cu-organic complex crystal. The preparation method has the advantages of low cost for raw materials, easy process and operation and low energy consumption. The nanometer Cu-organic complex crystal can realize high-efficiency catalytic reduction of 4-nitrophenol into 4-aminophenol and has good application prospect in heterogeneous catalytic reduction.

Disclosed is related to a thermosetting resin composition which comprises a polyimide resin (A) having a phenolic hydroxyl group, preferably a polyimide resin (A) produced from an aminophenol (a), a diamino compound (b) and a tetrabasic acid dianhydride (c), and an epoxy resin (B); and a cured product thereof. The resin composition is excellent in storage stability, and gives a cured product excellent in flame retardancy and heat resistance. Furthermore, when the cured product is in a film form, the product has sufficient flexibility and excellent folding endurance.

The invention discloses a preparation method of a nitrogen and phosphorus fire retardant, a nitrogen and phosphorus fire retardant and an application thereof. The preparation method comprises the following steps of: carrying out condensation reaction on aromatic dicarboxaldehyde and 4-aminophenol, then carrying out addition reaction with DOPO and obtaining a nitrogen and phosphorus fire retardant molecule. The obtained nitrogen and phosphorus fire retardant molecule has amino and phenolic active groups, and further can react with substances containing epoxy functional groups, so that the defects of low thermal decomposition temperature, poor compatibility with polymer matrix and easy mobility of the traditional small-molecular flame retardant are overcome. After the nitrogen and phosphorus fire retardant is added into an epoxy resin system, the formed cured matter has good flame retardant performance, and the limit oxygen index is greatly improved. The method is simple and easy, does not need to use a catalyst and gas protection, is easy to control, good in repeatability, simple in after-treatment process and high in yield and is suitable for enlarged production.

The invention relates to a modified cured rubber compound which comprises (i) the rubber components of natural rubber or synthetic rubber, (ii) methano donator, (iii) aralkyl resorcin-aldehyde resin as the methano acceptor, which is modified by m-aminophenol. The inventive methano acceptor has lower smoke degree than R-80 and higher vulcanizing speed than Penacolite B-20-S. The tension and tearing tests prove that the rubber added with the aralkyl resorcin-aldehyde resin modified by m-aminophenol has better performance than R-80 and B-20-S.

The invention discloses a phosphorus-nitrogen type flame retardant containing an active double bond as well as a preparation method and an application thereof. The preparation method comprises the following steps: carrying out Mannich reaction on 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide, p-aminophenol and paraformaldehyde in the presence of a solvent to obtain a product and washing the product with methanol to obtain a phenolic intermediate compound; reacting the phenolic intermediate compound with methacryloyl chloride in the presence of a solvent and an acid binding agent, filtering to remove acid binding agent salts generated in the reaction to obtain a crude product, purifying the crude product by virtue of washing, carrying out spin evaporation and drying to obtain the phosphorus-nitrogen type flame retardant containing the active double bond. The phosphorus-nitrogen type flame retardant containing the active double bond can be applied in preparation of flame-retardant polymer materials. The raw materials are easily available and the cost is low; the reaction conditions are mild and the yield is high; the purification and separation operations of the product are simple and the phosphorus-nitrogen type flame retardant is easily industrialized and complies with environmental requirements; the flame-retardant effect is good and the application range is wide.

The invention relates to a novel method for preparing loading type nanometer nickel catalyst; the method takes a carrier loaded with a revulsant as a precursor to induce hydrazine hydrate to reduce a nickel salt solution; the crystal grains of the formed nanometer nickel is directionally deposited on the surface of the carrier with no aggregation; the loading type nanometer nickel catalyst prepared by the method has the advantages of high loading of activating components, small grain diameters, good dispersibility and high activity as well as being suitable for catalytic hydrogenation reaction.

The invention discloses a method for preparing a 2-substituted benzoxazole compound. According to the method, a benzylamine compound or a benzaldehyde compound or a benzyl alcohol compound, and o-toluidine-N-methyl-o-phenylenediamine, ortho-aminophenol and o-aminobenzenethiol serve as raw materials, metals palladium, platinum or ruthenium serves as a catalyst, and N,N-dimethylformamide, N,N-dimethylacetamide or N-methylpyrrolidone serves as a solvent. The method comprises the following preparation steps: (1) mixing the raw materials; (2) reacting; (3) separating and extracting; and (4) drying and concentrating. An oxidant and a hydrogen acceptor are not required in the whole preparation process, and the used partial catalysts can be recycled. The method is high in atom economy, simple in aftertreatment and mild in reaction conditions and has a certain industrial application prospect.

The invention discloses a preparation method of a Ni-based catalyst modified by an aid Pt supported by multi-wall carbon nanotubes as a carrier and application. The preparation method comprises the following steps: firstly, performing acid modification on multi-wall carbon nanotubes by using nitro-sulfuric acid; by taking the multi-wall carbon nanotubes as a carrier, putting precursor salts of platinum and nickel according to the multi-wall carbon nanotubes to hexachloroplatinic acid hexahydrate and nickel nitrate hexahydrate according to a mass ratio of (5-10):(0.1-0.5):(5-10); further addingdeionized water, performing ultrasonic stirring, drying, and performing roasting and reduction, thereby finally obtaining an expected catalyst Pt-Ni / MWCNT. The catalyst prepared by using the method is low in cost, economic and effective, good in universality, good in environmental-friendliness, free of equipment corrosion and good in circulation property, and is relatively high in activity and relatively high in p-aminophenol selectivity under a relative gentle reaction condition in a process that p-aminophenol is prepared from nitrobenzene through one-step hydrogenation rearrangement, the production conditions can be improved, the production cost is reduced, and the product quality is improved.

The present patent application relates to an agent for oxidative coloring of keratin fibers, containing a combination of 2-amino-5-ethylphenol and at least one m-aminophenol of general Formula (I) wherein R1=H or C2H4OH; R2=CH3 or C2H5, and R3=H or CH3; wherein R2 is not equal to CH3, if R1 and R3 equal H; or physiologically compatible, water-soluble salts thereof.

The invention discloses a method for preparing high-efficiency concrete water reducer of aromatic amino sulfonic acid through condensation reaction of waste water from synthesis process of p-aminophenol with sulfanilic acid and formaldehyde. The molar ratio of the materials of phenolic compound, sulfanilic acid and formaldehyde for condensation reaction during the preparation process is controlled to be 1:(0.5-1):(1.5-2.5); the molar ratio of phenol added to the sulfanilic acid is controlled to be (0-1):1; the reaction temperature and the pH value of the reaction solution are controlled on a segmental basis; and after the reaction is finished, the reaction solution is condensed under vacuum condition to obtain the high-efficiency water reducer liquid of aromatic amino sulfonate with the mass ratio of 40%. Not only is the environment pollution problem in the production process of p-aminophenol solved, but also the high-efficiency concrete water reducer of aromatic amino sulfonic acid with low cost can be prepared.

The invention provides an in-situ nitrogen-doped hollow carbon ball and a preparation method thereof and a preparation method and application of an electrode material and relates to the technical field of electrochemistry energy materials. According to the in-situ nitrogen-doped hollow carbon ball, the SiO2 ball is used as a rigid membrane plate, formaldehyde is used as a carbon source, and one ormore of p-acetamidophenol, 2-acetamidophenol, p-aminophenol and m-aminophenol are used as a nitrogen source; the rigid membrane plate, the carbon source and the nitrogen source are placed in a reaction system of ethyl alcohol, water and ammonium hydroxide; through a sol-gel process, the SiO2 ball is wrapped by phenolic resin prepared through an aldol condensation reaction, the SiO2 / phenolic resinball with a core-shell structure is prepared, and the nitrogen-doped hollow carbon ball is obtained through carbonization and silicon removal. The prepared nitrogen-doped hollow carbon ball has the advantages of being small in nanoscale, even in shape, high in specific surface area and the like and has wide application prospects in the aspects such as energy storage, catalysis and adsorption.

The invention discloses a method for preparing a flexible substrate-based sensitive membrane material of a sensor for detecting gases. The method comprises the following steps of: cleaning a flexible substrate, coating a photoresist on the flexible substrate and then performing photoetching development so as to etch off partial photoresist, thereby forming an electrode pattern; orderly forming a Cr layer and a Au layer on the flexible substrate with the electrode pattern formed thereon, and peeling off the two layers to form a Cr / Au electrode; and then depositing a layer of carbon nano-tube doped poly-m-aminophenol film on the substrate on which the Cr / Au electrode is formed already by methods such as dip-coating, screen printing and the like. According to the flexible substrate-based sensitive membrane material provided by the invention, the doping of the carbon nano-tubes completely takes the place of a concentrated strong acid traditionally doped in poly-m-aminophenol; in addition, the doping of the carbon nano-tubes also improves the sensitivity of the poly-m-aminophenol material to the detection of alcohols and ammonia at the normal temperature, and also realizes operability on the flexible substrate.

The present invention relates to a preparation method and applications of a functional coordination polymer, and belongs to the technical fields of material science, nanometer materials, catalysis and the like. According to the present invention, polyvinylpyrrolidone, silver nitrate and 3-ethyl-1,2,4-triazole are adopted as main raw materials to prepare Ag@MOF, and a porous titanium dioxide shell layer is coated on the surface to prepare the functional coordination polymer Ag@MOF@TiO2. The polymer has the excellent performance of catalytic reduction of 4-nitrophenol into 4-aminophenol and catalytic oxidation of styrene into styrene oxide, and has good application prospects in heterogeneous catalytic reduction and oxidation reactions.

A preparing method and uses of a hydrogenation catalyst are provided. The method includes (1) loading cerium oxide that is adopted as a carrier with a metal nickel salt, and performing calcination in an air atmosphere to obtain nickel oxide loaded by the cerium oxide; (2) fully mixing the compound obtained in the step (1) with ethanediamine and carbon tetrachloride and refluxing and reacting the mixture in xylene to obtain a nitrogen-containing polymer clad catalyst precursor, or mixing the compound obtained in the step (1) with glucose and a nitrogen-containing compound to obtain a catalyst precursor; and (3) subjecting the catalyst precursor to high-temperature calcination at 500-1000 DEG C in an inert atmosphere to obtain the nitrogen-doped carbon-clad metal nickel hydrogenation catalyst. The catalyst is used for catalyzing hydrogenation of nitrobenzene to synthesize p-aminophenol, and the conversion ratio of the nitrobenzene and selectivity of the p-aminophenol can all reach 100%.

The invention relates to a preparation method of a molybdenum disulfide coated titanium dioxide hollow core-shell structure composite photocatalyst, and application of the photocatalyst. The problems that the composite photocatalyst synthesized by the existing method is expensive and has bad 4-nitrophenol treatment effect are solved. According to the method, MoS2 grows on the surface of hollow TiO2 in situ by a hydrothermal method, the specific surface of the composite photocatalyst is increased, and the interfacial charge transfer rate is increased; furthermore, the preparation method has the advantages of simple, green and efficient synthesis method. The molybdenum disulfide coated titanium dioxide hollow core-shell structure composite photocatalyst is used for performing photocatalytic reduction on 4-nitrophenol into 4-aminophenol.

The method for simultaneously dyeing and permanent shaping of hair includes dividing the hair into strands an winding the strands onto curlers: mixing a hair shaping component (A) containing from 6 to 15 percent by weight of a keratin-reducing substance with a dye component (B) to form a dyeing and shaping composition prior to application on the hair; treating the hair with the dyeing and shaping composition and then allowing it to act on the hair for an acting time sufficient for the permanent shaping; after that, treating the hair with a fixing composition; allowing the fixing composition to act on the hair from 1 to 40 minutes and then subsequently rinsing the hair. The dye component (B) contains at least one oxidative coupler compound and at least one oxidative dyestuff selected from a group consisting of certain 4,5-diamino-pyrazole derivatives and certain aminophenol derivatives.

This invention relates to very specific oxyalkylene-substituted aminophenol compounds as intermediates for the production of poly(oxyalkylene)-substituted xanthene (or other type) colorants. Such an inventive intermediate compound is produced in a single step by reacting an oxyalkylene oxide having from 3 to 12 carbon atoms (branched or unbranched), glycidol, or a glycidyl directly with aminophenol without the use of a catalyst and at a relatively low temperature. Propylene oxide and m-aminophenol are the preferred reactants. The propylene oxide selectively reacts with the amine group on the m-aminophenol without propoxylating the phenolic hydroxyl group. Such a specific method thus does not require extra time- and cost-consuming steps of protecting the phenolic hydroxyl group from attack. After production, this intermediate may be reacted with suitable compounds to ultimately form any number of different colorants, including xanthenes, oxazines, coumarins, and the like. The resultant oxypropylene groups may subsequently be reacted with electrophile compounds to produce any number of different colorants. Resultant colorants produced through the reaction of the inventive intermediate are also contemplated within this invention.

The invention relates to a synthetic method of 2-aminophenol-4-sulfonamide. The synthetic method comprises the steps of chlorosulfonation, ammoniation, hydrolysis, acidification and reduction, wherein the chlorosulfonation comprises the following two steps: (a) adding chlorosulfonic acid into p-nitrochlorobenzene which serves as a raw material, and carrying out sulfonation reaction to obtain 4-chloro-3-nitrobenzene sulfonic acid; and (b) adding sulfoxide chloride into 4-chloro-3-nitrobenzene sulfonic acid obtained in the step (a), and carrying out chlorination to obtain 4-chloro-3-nitrobenzenesulfonyl chloride. According to the synthetic method, a chlorosulfonation process is improved, and the chlorosulfonation is carried out in two steps, namely p-nitrochlorobenzene is taken as the raw material, is firstly sulfonated by chlorosulfonic acid and is then chloridized by sulfoxide chloride, so that the consumption of chlorosulfonic acid is reduced, the unnecessary wasting is reduced, the production cost is saved, and the yield of products is increased to reach up to 96.88%.

Treating or preventing inflammatory processes and diseases in dogs associated with the activity of inducible cyclo-oxygenase-2 (COX-2), while at the same time reducing or eliminating undesirable side effects associated with simultaneous inhibition of the activity of constitutive cyclo-oxygenase-1 (COX-1) by selectively inhibiting COX-2 activity with reference to COX-1 activity, wherein the selectivity ratio or COX-2:COX-1 activity inhibition is at least 3:1 based on ex vivo inhibition levels measured in whole blood; the inhibitor is a member selected from the group of anti-inflammatory compounds consisting essentially of salicylic acid derivatives, p-aminophenol derivatives, indole and indene acetic acids, heteroaryl acetic acids, arylpropionic acids, anthranilic acids, enolic acids, and alkanones; the inhibitor in particular is comprised of (+)(S)-enantiomer of 6-chloro-alpha-methyl-9H-carbazole-2-acetic acid.

An oxidative dyeing composition comprising a 1-hexyl-4,5-diaminopyrazole compound or a 1-heptyl-4,5-diaminopyrazole compound of formula (I) in combination with a 2-aminophenol compound of formula (II):wherein R1, R2, R3, R4, R5, R6 and R7 are as defined herein and a=1 or 2.The composition provides good hair color intensity together with good wash and bleeding fastness.

The invention relates to the technical field of organic synthesis and bulk pharmaceutical chemical intermediate preparation, in particular to a preparation method of cystic fibrosis treatment new drug ivacaftor key intermediate 2,4-ditertbutyl-5-aminophenol. The method comprises the steps of 1, acetylation, wherein (A) m-aminophenol or (B) acetic anhydride or acetyl chloride is used as a raw material, and a reaction is carried out to prepare N-(3-hydroxyphenyl)acetamide; 2, tertiary butyl substituting, wherein N-(3-hydroxyphenyl) acetamide and tert butyl alcohol are catalyzed by concentrated sulfuric acid to prepare N-(2,4-ditertbutyl-5-hydroxy phenyl)acetamide; 3, deacetylation, wherein the N-(2,4-ditertbutyl-5-hydroxy phenyl)acetamide is hydrolyzed by acid or alkali to obtain 2,4-ditertbutyl-5-aminophenol. According to the synthesis process, raw materials are easy to obtain, reaction conditions are mold, postprocessing is easy and convenient, amplified preparation is promoted, and the yield is high.

The present invention is aniline-m-aminophenol copolymer as one kind of conductive polymer and its synthesis. Inside an electrolytic bath with Pt electrode or C electrode, aniline, m-aminophenol and sulfuric acid or hydrochloric acid are electrolyzed to obtain the conductive polymer, aniline-m-aminophenol copolymer, which is washed with dilute hydrochloric acid solution and dried. The conductive polymer has excellent characteristic similar to that of polyaniline, and capacity of maintaining high chemical activity in strong acid solution and pH 1.0-11.0 sodium sulfate solution. When the pH value of the copolymer raises from 5.0 to 11.0, it has chemical activity lowered to 58.3 %. The copolymer has wide application potential range,(-0.2 to 0.80 Vú¼vs.SCE), conductivity of 0.8-1.4S / cm, and lower dependence on pH value.

The invention discloses a cosmetic oxidative hair dye detection method, which aims at five target objectives: p-phenylenediamine HCl, P-aminophenol, toluene-2,5-diamine sulfate, resorcinol, and m-aminophenol. The detection method comprises the following steps: step A, pre-treating a sample; step B, preparing a standard stock solution; step C, preparing a standard work solution; and step D, setting the analysis conditions. The dye components has the characteristics of strong polarity, low volatility, and instability, and the provided detection method can effectively control the uncertain factors and is capable of successfully and precisely finishing the detection.

The method for simultaneously dyeing and permanent shaping of hair includes winding hair strands onto curlers; mixing a dye component (B) containing 1 to 10 percent by weight of one or more dye compound and an amount of a keratin-reducing substance with a shaping component (A) containing from 6 to 15% by weight of the keratin-reducing substance in a weight ratio of from about 1:1 to 1:10 to form a dyeing and shaping composition, which necessarily contains from 5 to 18% by weight of the keratin-reducing substance; then allowing the hair with the dyeing and shaping composition to act on the hair for an acting time sufficient for permanent shaping; after that, allowing a fixing composition to act on the hair for 1 to 40 minutes and then subsequently rinsing the hair. The dye component (B) contains 4,5-diaminopyrazole derivatives and certain aminophenol derivatives.

The invention provides an autocatalysis preparation method of a copolymer benzoxazine-resin polymer sphere and belongs to the technical field of polymers. According to the method, on the condition that no catalyst is added, m-aminophenol and formaldehyde are dissolved in a solvent, and after a polymerization reaction, the copolymer benzoxazine-resin polymer sphere is obtained; the solvent is a mixed solution of water and alcohol compounds. The invention further provides a preparation method of a copolymer benzoxazine-resin-based carbon sphere; the method comprises the step that the obtained copolymer benzoxazine-resin polymer sphere is sintered to obtain the corresponding carbon sphere. The obtained copolymer benzoxazine-resin polymer sphere and carbon sphere have the high monodispersity, the size of the resin sphere can be adjusted in a wide range, and the application of the resin sphere is facilitated. The copolymer benzoxazine-resin polymer sphere prepared through the method has the high concentration in a unit reaction system.

The invention relates to a method for preparing unsymmetrical rhodamine. The method comprises the following steps of: reacting N,N-diethyl m-aminophenol with phthalic anhydride to prepare an intermediate ketonic acid; reacting the ketonic acid with the corresponding binaphthol structure under the action of a catalyst to generate the unsymmetrical rhodamine; directly performing ethyl esterification on the crude products and performing column chromatography; and recrystallizing to obtain unsymmetrical rhodamine dye which meets the requirements and has different structures. Compared with the prior art, the method has the advantages of low requirement on equipment, low production cost and high production efficiency and is easy to operate. The obtained novel rhodamine has good fluorescence property and high stability and can be widely applied.

The invention provides a method for preparing m-aminophenol by the catalytic hydrolysis of m-phenylenediamine, which comprises the following steps: under the condition of the existence of inorganic acid catalysts, m-phenylenediamine is hydrolyzed at the temperature of 180 DEG C to 230 DEG C and the pressure of 0.9 to 3.0 MPa for 2 to 10 hours; a solvent is adopted to extract hydrolysis products to respectively obtain m-dihydroxybenzene extraction liquid, m-phenylenediamine extraction liquid and m-aminophenol extraction liquid according to different pH values, and then the m-phenylenediamine extraction liquid is processed to be used as raw material for hydrolysis next time; the m-aminophenol extraction liquid is processed by vacuum distillation after being processed by exsolution, and then active carbon is decolourized and recrystallized to obtain m-aminophenol whose purity is more than 99 percent; and the m-dihydroxybenzene extraction liquid is processed by vacuum distillation after being processed by exsolution to obtain the m-dihydroxybenzene whose purity is 99 percent. The method for preparing m-aminophenol by catalytic hydrolysis of m-phenylenediamine is adopted, and proper technological conditions are controlled in the reaction process. The method has the advantages of low cost of raw material and high product yield.

The object of the present patent application are agents for the oxidative coloring of keratin fibers, particularly hair, based on a developer substance-coupler substance combination, characterized in that they contain at least one meta-aminophenol derivative of general formula (I)whereinR1 denotes hydrogen, a C1-C6 alkyl group, a C2-C4 hydroxyalkyl group, a C2-C4 dihydroxyalkyl group, a C1-C4 alkoxy group or a halogen atom; and R2 denotes hydrogen, a hydroxy group, a carboxylic group, an aminocarbonyl group or a hydroxymethyl group.