Process for the preparation of 1,4-diaminoanthraquinone-2,3-disu

Details Process for the preparation of 1,4-diaminoanthraquinone-2,3-disu Process for the preparation of 1,4-diaminoanthraquinone-2,3-disu

1979-10-09

1981-07-21

Garvin, Patrick

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

260377, C07L143665

Patent

active

042798256

ABSTRACT:
1,4-Diaminoanthraquinone-2,3-disulphonic acid, which is a valuable dyestuff intermediate product, is obtained in a simple manner when 1,4-diamino-2,3-dichloroanthraquinone is reacted by itself with boric acid, that is to say without the condensation agents which are otherwise customary, such as phenol, sulphuric acid or acetic anhydride, and the reaction product is treated with alkali metal sulphites in a known manner.
The new process is more economical and pollutes the environment to a lesser extent than the processes known hitherto.

REFERENCES:
patent: 1975386 (1934-10-01), Baumann
patent: 2008056 (1935-08-01), Baumann
patent: 2025370 (1935-12-01), Baumann
patent: 2628963 (1953-02-01), Laucius et al.
Chemical Abstract vol. 40, #32456, Noboru et al., "1,4,Diamino-2,3-dicyanoanthraquinone", 1975.

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