Process for purifying crude monochloro- and monobromoanthraquino

Details Process for purifying crude monochloro- and monobromoanthraquino Process for purifying crude monochloro- and monobromoanthraquino

1983-11-23

1985-03-26

Hollrah, Glennon H.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

260694, C07C 5024

Patent

active

045072400

ABSTRACT:
A process for purifying crude monochloro- or monobromoanthraquinone is described. In this process, monochloro- or monobromoanthraquinone which contains by-products as impurities is mixed with a hot non-polar aliphatic solvent in such a ratio that more than half of the crude product goes into solution and the remainder which contains the impurities forms a second lower phase, said eutectic melt is separated, and the saturated solution is allowed to cool, and the monochloro- or monobromoanthraquinone, which precipitates in pure form, is isolated.

REFERENCES:
patent: 1969044 (1934-08-01), Shaw et al.
patent: 2587093 (1952-02-01), Belshaw et al.

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