Chemistry of carbon compounds – Miscellaneous organic carbon compounds – C-metal
Patent
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.
Regli Johann
Somlo Tibor
Ciba-Geigy AG
Covington Raymond
Hollrah Glennon H.
Mansfield Kevin T.
Roberts Edward M.
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