Process for the preparation of 1-amino-4-bromoanthraquinone-2-su

Details Process for the preparation of 1-amino-4-bromoanthraquinone-2-su Process for the preparation of 1-amino-4-bromoanthraquinone-2-su

1978-09-05

1980-07-22

Douglas, Winston A.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

C07C14363

Patent

active

042139104

ABSTRACT:
A process for preparing 1-amino-4-bromoanthraquinone-2-sulphonic acid or an alkali metal salt thereof which comprises contacting 1-amino-anthraquinone at a temperature in the range of 90.degree. to 150.degree. C. with an SO.sub.3 -containing sulphuric acid (oleum) and thereafter treating the resultant sulphonated 1-amino-anthraquinone with at least 0.5 molar equivalent of bromine, relative to 1 mol of 1-amino-anthraquinone, at temperatures in the range from 60.degree. to 100.degree. C.

REFERENCES:
patent: 1841997 (1932-01-01), Weinand
patent: 2413790 (1947-01-01), Seymour et al.
Chemical Abstract, vol. 82, #31183; "1-Amino-4-bromoanthraquinone" Nakahara 7/24/74.

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