Process for the preparation of 1,4-diamino-anthraquinone-2-sulph

Details Process for the preparation of 1,4-diamino-anthraquinone-2-sulph Process for the preparation of 1,4-diamino-anthraquinone-2-sulph

1984-03-16

1985-06-04

Hollrah, Glennon H.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

C07C143665

Patent

active

045213410

ABSTRACT:
1,4-Diamino-anthraquinone-2-sulphonic acid is obtained in a simple manner, in good yield and good purity, by reacting 1-amino-4-bromo-anthraquinone-2-sulphonic acid with ammonia in water in the presence of copper catalysts at an elevated temperature, under a partial pressure of ammonia of at least 5 bar.

REFERENCES:
patent: 3234242 (1966-02-01), Basel et al.
patent: 3507850 (1979-04-01), Cohen et al.
patent: 4042605 (1977-08-01), Hartwig
patent: 4294769 (1981-10-01), Krock et al.
E. de Barry Barnett, Anthracene and Anthraquinone, 1921, Van Nostrand Co., New York, N.Y., p. 196.

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