Process for producing disperse dyes

Details Process for producing disperse dyes Process for producing disperse dyes

1980-05-09

1981-12-08

Douglas, Winston A.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

260380, C07C 9725

Patent

active

043047254

ABSTRACT:
A process for producing disperse dyes starting with anthraquinone compounds of the formula I ##STR1## in which one X is bromine and the other X is methylamine, or with mixtures thereof, which process comprises reacting these compounds with sulfuric acid, optionally containing SO.sub.3, in the presence of boric acid, at a temperature of between 100.degree. and 150.degree. C., to give compounds of the formula II ##STR2## in which one Y is hydroxyl and the other Y is methylamine, and n is 0.5 to 2.0, or mixtures thereof.

REFERENCES:
patent: 4045457 (1977-08-01), Gehrke et al.

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