Nitric Acid → 1-Nitroanthraquinone

Participants

Reaction Conditions

Reaction Steps

A mixture of 208 g of anthraquinone and 2,550 g of 99% strength nitric acid (molar ratio 1:40) is stirred for 10 minutes at 20°C and then diluted with 302 ml of water to an acid content of approx. 88% by weight. 1,350 g of 98% strength nitric acid are then distilled off in vacuo, resulting, in the sump, in a molar ratio of approx. 18:1 and an acid content of 78%. The precipitate which has separated out is filtered off, washed until neutral and dried. The product is subjected to a fractional vacuum distillation at 10 mm Hg, and a head temperature of 281°C. 181 g of 99.2% pure 1-nitroanthraquinone (71% of theory) are obtained as the distillate.

Provenance & Evidence