Title:
【発明の名称】2↓-アミノ↓-3↓-プロムアントラキノンの製法
Document Type and Number:
Japanese Patent JPS6042787
Kind Code:
B2
Abstract:
In a process for the manufacture of 2-amino-3-bromoanthraquinone by heating 2-aminoanthraquinone with bromine (in the molar ratio of 1:1) in sulfuric acid, while mixing, the improvement wherein crude 2-aminoanthraquinone, in sulfuric acid of from 60 to 90 percent strength by weight, which contains from 10 to 15% by weight of an alkanecarboxylic acid of 3 or 4 carbon atoms or a mixture of such acids, is heated with from 1 to 1.05 moles of bromine per mole of 2-aminoanthraquinone at from 130 to 150 DEG C. The 2-amino-3-bromoanthraquinone which is isolated may be used for the manufacture of dyes. It is at least as pure as that obtained from purified 2-aminoanthraquinone by the process of the prior art.
Inventors:
WARUTAA SHUETSUKENDEIIKU
HAINRITSUHI HIRAA
RAINHORUTO KOORUHAUPUTO
HAINRITSUHI HIRAA
RAINHORUTO KOORUHAUPUTO
Application Number:
JP1254878A
Publication Date:
September 25, 1985
Filing Date:
February 08, 1978
Export Citation:
Assignee:
BASF AG
International Classes:
C09B1/22; C07C225/34; C09B1/16; C09B1/20; (IPC1-7): C07C97/24; C09B1/20
Attorney, Agent or Firm:
Masao Kobayashi
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