9 results about "O-aminophenol" patented technology

The utility model relates to the technical field of o-phenylphenol, in particular to an o-aminophenol production buffer tank convenient to fix, which comprises a buffer tank, a plurality of groups of supporting legs are fixedly mounted at the bottom of the buffer tank, universal wheels are mounted at the bottom of each group of supporting legs, and positioning mechanisms are arranged at the bottoms of the supporting legs. The fixing mechanisms are matched with the positioning mechanisms and need to be poured in the ground, each positioning mechanism comprises a guide column capable of ascending and descending, a chain is fixedly installed at the bottom of each guide column, each fixing mechanism comprises a fixing sleeve which is vertically arranged, and the inner diameter of each fixing sleeve is consistent with that of each guide column; according to the buffer tank convenient to fix and used for ortho-aminophenol production, the buffer tank can be conveniently positioned, displacement and shaking of the buffer tank in the production process are avoided, and the stability of ortho-phenylphenol production is further improved.

This invention relates to a method for identifying and detecting urinary biomarkers of whole-grain wheat intake. These biomarkers include glycine conjugates of 3,5-dihydroxybenzoic acid, sulfate conjugates of o-aminophenol, sulfate conjugates of 2-acetaminophen, sulfate conjugates of 3,5-dihydroxyphenylvaleric acid, glucuronic acid conjugates of o-aminophenol, or glucuronic acid conjugates of 2-acetaminophen. The invention also relates to a high-throughput screening method for urinary biomarkers of whole-grain wheat intake. A whole-grain wheat dietary intervention experiment was designed, and through comparative analysis of human urinary metabolic profiles, non-targeted metabolomics technology was used to screen for urinary metabolic biomarkers of whole-grain wheat, providing a method for accurately assessing whole-grain wheat intake.

The invention relates to an environment-friendly stripping agent of photosensitive ink for electroplating shielding, and belongs to the technical field of stripping agents. The preparation method comprises the following steps: carrying out nucleophilic addition on phosphorous acid and diethylene glycol monobutyl ether to obtain a modified precursor containing a phosphoester structure, carrying out Michael addition on the modified precursor and ortho-aminophenol to obtain a modified monomer, carrying out diazotization reaction on the modified monomer and ortho-nitroaniline, and then reducing to obtain the 2-(2-nitrophenyl)-1, 2, 4-thiadiazole. And finally, compounding the modified corrosion inhibitor with a stripping agent system, so as to obtain the environment-friendly stripping agent for the photosensitive ink for electroplating shielding. The environment-friendly stripping agent of the photosensitive ink for electroplating shielding has the advantages of environment friendliness, no toxicity, high stripping efficiency, broad-spectrum corrosion inhibition and few surface residues.

The application provides a preparation method of high-quality 2,2-bis(3-amino-4-hydroxyphenyl)propane, which comprises the following steps: uniformly stirring o-aminophenol, 2,2-dichloropropane and a catalyst, increasing the temperature, and performing heat preservation reaction; after the reaction is completed, the temperature is reduced, white solids are precipitated, filtration is performed, a filtrate and solids are obtained, and the solids are washed, filtered and vacuum-dried to obtain 2,2-bis(3-amino-4-hydroxyphenyl)propane. The preparation method adopts a new process system, raw materials and a catalyst are low in price, environment-friendly, safe in operation, and high in product quality, and is suitable for large-scale production.

This invention provides a method for preparing benzoxazine film-forming resin precursor materials and their applications, belonging to the fields of organic synthesis and semiconductor photoresist technology. The method uses substituted o-aminophenol as a starting material and proceeds through four steps: nucleophilic substitution cyclization, regioselective bromination, amide-selective reduction, and reductive amination, to prepare N-substituted brominated dihydrobenzoxazine compounds. This invention achieves specificity of the sequential reaction sites through differences in reactivity and control of process parameters, resulting in products with high purity and ultra-low or even no metal ion residue. The N-substituted brominated dihydrobenzoxazine compounds prepared by this invention have low curing temperatures, high crosslinking activity, and possess both bromine atom active sites and a rigid benzoxazine framework, making them suitable as precursor materials for film-forming resins in photoresists.

The invention discloses a preparation method of 5-nitro-2-aminophenol, which comprises the following specific steps: dispersing raw materials of halogenated nitroaniline and a catalyst in a sodium hydroxide aqueous solution, reacting for 12-22 hours under the conditions that the reaction temperature is 80-120 DEG C and the pressure is 0.3-1.5 MPa, hydrolyzing the halogenated nitroaniline to obtain a crude product of 5-nitro-2-aminophenol, and purifying the crude product of 5-nitro-2-aminophenol to obtain the 5-nitro-2-aminophenol. And after the reaction is finished, cooling to room temperature, carrying out suction filtration, washing with water, and drying to obtain the pure product 5-nitro-2-aminophenol. Compared with an industrial ortho-aminophenol method, the method has the advantages that halogenated nitroaniline is used as a raw material, three-step reaction is shortened into one-step reaction, reaction operation is simple, raw materials are cheap and easy to obtain, the yield is high, the production cost is reduced by 20%, and economic benefits of enterprises are greatly improved.

The application relates to the technical field of organic silicon materials, in particular to a high-temperature-resistant coupling agent and application of the high-temperature-resistant coupling agent in a polyphenyl ether base material circuit board, wherein the high-temperature-resistant coupling agent has a structure shown in formula I. The high-temperature-resistant coupling agent is prepared by coupling reaction of an o-aminophenol compound and p-phenyloxy iodobenzene to obtain an intermediate, and then reacting the intermediate with chlorosilane in the presence of alkali. The high-temperature-resistant coupling agent contains an aromatic ring structure, a siloxane group and a polar adaptive site at the same time, has high matching degree with polyphenyl ether resin, benzoxazine resin, inorganic fillers and metal foils, can significantly improve the interface bonding force between copper foils and polyphenyl ether base materials, is synthesized by a two-step method, has mild reaction conditions, simple post-treatment, stable yield and less waste, and is suitable for large-scale industrial production.

The invention discloses a method for preparing ortho-aminophenol through continuous catalytic hydrogenation, which comprises the following steps: premixing a raw material solution containing ortho-nitrophenol with hydrogen, feeding into a tubular reactor filled with a specific composite catalyst, carrying out catalytic hydrogenation reaction, separating the reaction effluent through an online membrane separation unit to obtain a product penetrating fluid, and carrying out continuous catalytic hydrogenation on the product penetrating fluid to obtain the ortho-aminophenol. Meanwhile, trapped fluid containing unreacted materials and the catalyst is returned to the system for circulation; wherein the process parameters are dynamically adjusted by the intelligent control system according to parameters such as product concentration and flow monitored on line. Through system integration of catalyst design, reaction-separation coupling and intelligent control, high-efficiency and high-selectivity production under lower pressure is realized, the yield and purity of ortho-aminophenol are greatly improved, and the system is stable and controllable in operation and has the outstanding advantages of safety, energy conservation and high product quality.