1-Nitroanthraquinone → 1-Aminoanthraquinone

Participants

Reaction Conditions

Reaction Steps

A mixture of a wet cake of crude 1-nitroanthraquinone (A) (solid content, 28.6 %) (35 parts) and a naphthalenesulfonic acid salt-formalin condensation product (1 part) is finely pulverized by the aid of a wet type pulverizer using stainless steel balls (3 mmφ). The resultant finely pulverized wet cake (36 parts) is charged into a reaction vessel, a 10.8 % aqueous solution of sodium sulfite (28 parts) is added thereto, and the mixture is stirred at 100° C. for 9 hours. After the mixture is cooled to 45° C., sodium sulfide flakes (purity, 60 %) (9.4 parts) are added, and the mixture is treated in the same manner as in Example 7 to obtain 1-aminoanthraquinone with high purity (6.3 parts). The composition is as shown in Table 1.

Provenance & Evidence