Description
Anthraquinone dyes are the second largest class of dyes after azo dyes, and 1-aminoanthraquinone is an important intermediate for the synthesis of anthraquinone dyes. It is the main raw materials of amino acid and pyrazole anthraquinone occupy an extremely important position in the dye industry.
Chemical Properties
deep brown crystalline powder
Uses
1-Aminoanthraquinone(82-45-1) is the most important intermediate for manufacturing acid, reactive, disperse, and vat dyes.
Application
1-Aminoanthraquinone(82-45-1) has the ability to increase the solubility of anthraquinone derivatives in supercritical carbon dioxide. It is widely used in the preparation of various anthraquinone dyes. It also bridges Pt nanoparticles on carbon nanotubes as efficient electrocatalysts.
Preparation
1-Aminoanthraquinone (1-AAQ,82-45-1) is synthesized by the condensation of 2-substituted benzoic acid and xylene to yield 2-substituted-dimethylbenzophenone, subsequent oxidation of the methyl groups, ring closure to form a 1-substituted anthraquinone carboxylic acid, replacement of the 1-substituent with ammonia, and decarboxylation.
Biochem/physiol Actions
1-Aminoanthraquinone has the ability to increase the solubility of derivatives of anthraquinone in supercritical carbon dioxide.
Synthesis
Anthraquinone is sulfonated with nicotinic sulfuric acid in the presence of a small amount of mercury salt to generate anthraquinone-1-sulfonic acid, which is then neutralized with potassium hydroxide to form anthraquinone sulfonic acid potassium salt. Under high temperature and high pressure, ammonia and anthraquinone sulfonic acid potassium The salt action generates 1-aminoanthraquinone, and the generated sulfite reacts with the product again and the quality of the product decreases. Therefore, nitrobenzene sulfonate is usually used as an oxidant to oxidize sulfite to sulfate, which itself is reduced to m-aminobenzenesulfonic acid.
