Process for producing 1,4-diaminoanthraquinone-2-sulfonic acid

Details Process for producing 1,4-diaminoanthraquinone-2-sulfonic acid Process for producing 1,4-diaminoanthraquinone-2-sulfonic acid

1983-07-27

1985-04-09

Hollrah, Glennon H.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

C07C143665

Patent

active

045100870

ABSTRACT:
A process for the production of 1,4-diaminoanthraquinone-2-sulfonic acid or a salt thereof is disclosed, comprising reacting 1-amino-4-bromoanthraquinone-2-sulfonic acid or its salt with liquid ammonia in the presence of a copper catalyst wherein the reaction is carried out in the presence of an inert organic solvent, e.g., n-heptane and cyclohexane. In this process, crystals of the desired product do not substantially deposit on reactor walls, and distillation recovery of ammonia can be performed easily without causing deterioration of the desired product. 1,4-Diaminoanthraquinone-2-sulfonic acid or salt thereof is a useful intermediate for the preparation of, e.g., anthraquinone dyes.

REFERENCES:
patent: 2842564 (1958-07-01), Bloom
Barnett, Anthracene and Anthraquinone, 1921, pp. 194-197.

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