Process for separating off 1-amino-4-bromoanthraquinone-2-sulpho

Details Process for separating off 1-amino-4-bromoanthraquinone-2-sulpho Process for separating off 1-amino-4-bromoanthraquinone-2-sulpho

1978-08-31

1981-01-20

Garvin, Patrick

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

C07C143665

Patent

active

042461804

ABSTRACT:
A process for separating off 1-amino-4-bromoanthraquinone-2-sulphonic acid from the reaction mixture formed by the bromination of 1-aminoanthraquinone-2-sulphonic acid in sulphuric acid, which process comprises adjusting the sulphuric acid concentration of the reaction mixture under the prevailing conditions of temperature and pressure to effect precipitation of 1-amino-4-bromoanthraquinone-2-sulphonic acid as the sulphate and thereafter separating the resultant sulphate precipitate from the reaction mixture.

REFERENCES:
patent: 2413790 (1947-01-01), Seymour et al.
Chemical Abstract vol. 82 #31183; "1-Amino-4-bromoanthraquinone" Nakahara 7/24/74.
Chemical Abstract vol. 78 No. 1-3 #15915m "Purification of 1-amino-4-bromo-2-anthraquinone sulfonic acid" Thuering 9/21/72.
Chemical Abstract vol. 69 No. 22-24 #96343n "1-Amino-4-haloanthraquinone 2-sulfonic acid dye intermediates" Hruska 3/15/67.

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