573-07-9

Usage

InChI:InChI=1/C10H9NO4S/c11-8-5-4-6-7(10(8)12)2-1-3-9(6)16(13,14)15/h1-5,12H,11H2,(H,13,14,15)

Upstream product

• 117-59-9 1-hydroxynaphthalene-5-sulphonic acid 
• 23253-13-6 2-nitroso-1-naphthol-5-sulfonic acid 
• 7647-01-0 hydrogenchloride 

Downstream Products

• 606-41-7 2-amino-1-naphthol 
• 94386-30-8 1,2-Naphthochinon-2-diazid-5-sulfonsaeure 

Relevant academic research and scientific papers

Method for preparing amino-naphthol sulfonic acid with transfer hydrogenation method

The invention provides a method for preparing amino-naphthol sulfonic acid with a transfer hydrogenation method. The method is used for preparing amino-naphthol sulfonic acid by performing transfer hydrogenation reduction on nitroso or nitro-naphthol sulfonic acid and comprises the following steps: S110: sequentially adding the nitroso or nitro-naphthol sulfonic acid, an inert solvent, a catalyst and a hydrogen source in a reaction vessel, and performing transfer hydrogenation reduction at the temperature ranging from 20 DEG C below zero to 120 DEG C, wherein the hydrogenation reaction time is 0.5-10h; and S120: after reaction is complete, performing solid-liquid separation, and after concentrating separated liquid, performing acidification and product separation to acquire the required amino-naphthol sulfonic acid. By adopting a process for preparing the amino-naphthol sulfonic acid with the transfer hydrogenation method, operation is simple and convenient; the quality of a product is good; and a product is obtained by filtering and separating the catalyst after the reaction is finished, the catalyst and the solvent can be recycled after being simply treated, so that the pollution problem is solved, and the process is an environment-friendly green production process.

Method for preparing amino-naphthol-sulfonic acid through catalytic hydrogenation

The invention discloses a method for preparing amino-naphthol-sulfonic acid through catalytic hydrogenation, belonging to the technical field of organic synthesis. The method is characterized by using Raney nickel, Pt/C or Pd/C as a catalyst and carrying out catalytic hydrogenation reaction at a temperature of 50-120 DEG C and a pressure of 0.5-4MPa for 0.5-5 hours, thus preparing amino-naphthol-sulfonic acid, wherein the amount of the added catalyst is 0.5-8% of the mass of added nitroso group or nitro-naphthol-sulfonic acid. The product has liquid chromatography content of more than 98% and yield of more than 90%. The method has the advantages that the process is simple and convenient to operate and avoids equipment corrosion; the product obtained after reaction is completed can be directly used in the next reaction, without after-treatment, and does not generate any solid or liquid waste, thus avoiding the problems of difficulty in solid waste treatment and pollution in sodium hyposulfite processes; the product obtained by applying the process has good quality; and the production process is environment-friendly and green.

Unsymmetrical 1:2-chromium complexes containing an azo compound and an azomethine compound

Compounds of the formula: STR1 WHICH ARE EMINENTLY SUITABLE FOR DYEING NATURAL AND SYNTHETIC POLYAMIDES AND FOR COLORING SURFACE COATINGS. Dyeings on textile material are distinguished by very good lightfastness and very good fastness to wet treatments, for example fastness to water, perspiration, sea water and washing.