Hydrochloric Acid → HCID 131710449, compound

Participants

Reaction Steps

110 Parts sodium anthraquinone-1,5-disulphonate are heated together with 44 parts sodium m-nitrobenzene-sulphonate, 13 parts magnesium oxide, 1.3 parts copper sulphate. 5 H2O, 386 parts of water and 43.6 parts of sec. butylamine in an autoclave at 130° for 48 hours while stirring. After cooling, the reaction mixture is acidified with hydrochloric acid, the product is filtered off with suction and washed with a 2% sodium chloride solution until neutral. The moist filter cake is dissolved hot in 2700 parts of 2.5% hydrochloric acid. The solution is filtered off with suction while hot and the filtrate mixed with 50 parts sodium chloride. After cooling, the mixture is suction-filtered, the filtrate washed with a 2% sodium chloride solution until neutral, and dried. There are thus obtained 76.8 parts sodium 1-sec. -butylamino-anthraquinone-5-sulphonate containing about 92% of pure product.

Provenance & Evidence