6 results about "Meta-aminophenol" patented technology

The application discloses a water coal slurry additive prepared by using industrial by-products, which comprises the following raw material components in parts by weight: amino benzene sulfonic acid 10-20 parts, meta-amino phenol 10-20 parts, sulfite 5-15 parts, a basic adjusting agent in an appropriate amount and water 50-70 parts. The water coal slurry additive is prepared by directly using industrial by-products, realizes resource recycling, and has high slurry concentration, low viscosity, good fluidity and stability.

The present invention provides a first-agent hair dye composition that dyes light-colored hair a vivid primary red color, exhibiting high red color saturation and excellent colorfastness. [Solution] A first hair dyeing agent composition containing one or more selected from (A) 1-hydroxyethyl-4,5-diaminopyrazole, (B) 2,6-diaminopyridine, and (C) 5-(2-hydroxyethylamino)-2-methylphenol or m-aminophenol, wherein the mass ratio of component (C) to component (B) [(C) / (B)] is 0.10 to 0.80.

The invention discloses a synthesis process of a thermosensitive color developing agent 3, 3 '-benzenesulfonyloxy diphenyl urea, and belongs to the technical field of organic synthesis. According to the process, m-aminophenol, benzene sulfonyl chloride and triphosgene are used as raw materials, 1, 2-dichloroethane is used as a solvent, triethylamine is used as an acid-binding agent, a one-pot method is adopted to construct a two-step continuous reaction through sulfonylation and urea bonds, then acidification, liquid separation, extraction, spin-drying and methanol crystallization are performed to obtain a target product, and no intermediate needs to be separated in the whole process. According to the invention, parameters such as reaction temperature and feed ratio are optimized, the problems of tedious preparation process and low yield in the prior art are solved, the reaction condition is mild, the operation is convenient, the raw material is a conventional analytically pure reagent, the product yield is 72-76%, the purity is greater than 99.5%, the raw material utilization rate is high, the industrial application prospect is good, and the product can be widely used as a thermosensitive color developing agent.

The invention relates to a method for green and efficient preparation of 3-amino-4 '-nitrodiphenyl ether, and belongs to the technical field of organic synthesis. The method for preparing 3-amino-4 '-nitrodiphenyl ether comprises the following steps: S1, reacting a hydrogen bond acceptor and a hydrogen bond donor under a heating condition to prepare DES; and S2, adding parachloronitrobenzene and m-aminophenol into the DES prepared in the step S1, heating to carry out etherification reaction, and carrying out water washing and solid-liquid separation treatment on the reaction liquid to obtain the 3-amino-4 '-nitrodiphenyl ether product. The hydrogen bond receptor is at least one of choline chloride and betaine; the hydrogen bond donor is at least one of polyethylene glycol, urea and thiourea. The method for preparing the 3-amino-4 '-nitrodiphenyl ether has the advantages of mild reaction conditions, environmental friendliness and the like, and the 3-amino-4'-nitrodiphenyl ether product with high yield and high purity can be directly obtained.

The invention discloses a nitrogen-phosphorus / nitrogen-sulfur-doped hierarchical pore carbon material for a supercapacitor and a preparation method, and belongs to the technical field of preparation of carbon materials of supercapacitors. The technical problems that in the prior art, a hierarchical pore carbon material is poor in pore structure and impurity element doping coordination, and hierarchical pore regulation and control precision is insufficient are solved. The method comprises the following steps: firstly, preparing a soft template; the preparation method comprises the following steps: adding a prepolymer formed by m-aminophenol, formaldehyde and resorcinol or phloroglucinol into a soft template; wherein the pore-enlarging agent and the segmented copolymer form a supramolecular aggregate, and the supramolecular aggregate and the prepolymer are assembled through hydrogen bonds to obtain the phenolic resin gel. Adding an activating agent KOH into the phenolic resin gel for grinding; carrying out one-step carbonization activation reaction on the ground material to obtain an in-situ nitrogen-doped hierarchical porous carbon material; and finally, adding a doping agent into the in-situ nitrogen-doped hierarchical pore carbon material for grinding, and then putting into a ball milling tank for mechanical doping. No solvent is used in the operation process, so that the method is green and environment-friendly.

The invention belongs to the technical field of fine chemical processes, and particularly relates to a preparation method of N, N-dibutyl m-aminophenol. According to the method, three technologies of catalytic hydrogen borrowing N-alkylation of sodium m-aminophenol and n-butyl alcohol, sulfur dioxide acidification and reduced pressure distillation purification are combined, so that the technical bottlenecks that the N-alkylation reaction is difficult to regulate and control and a large amount of high-salinity wastewater is difficult to treat in the existing production method of N, N-dibutyl m-aminophenol are effectively solved; the rectification purification operation of m-aminophenol is avoided. Compared with the prior art, the method has the advantages of high economic benefit, small environmental burden, high catalytic efficiency, simplicity and convenience in operation and the like, meets the requirements of a green chemical process, and is easy for large-scale application.