Process for the purification of crude nitroanthraquinone

Details Process for the purification of crude nitroanthraquinone Process for the purification of crude nitroanthraquinone

1974-12-16

1976-10-12

Demers, Arthur P.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

C07C 7936

Patent

active

039857786

ABSTRACT:
The present invention relates to a process for the purification of crude 1-nitroanthraquinone in particular to a process for separating anthraquinone and 2-nitroanthraquinone from crude 1-nitroanthraquinone by treating the crude 1-nitroanthraquinone with a mixture of concentrated nitric acid and an inert organic solvent whereby a 1-nitroanthraquinone substantially free from anthraquinone and 2-nitroanthraquinone is obtained.

REFERENCES:
patent: 3766222 (1973-10-01), Hartwig et al.
patent: 3786073 (1974-01-01), Frey et al.

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