Process for the preparation of pure 1-nitroanthraquinone

Details Process for the preparation of pure 1-nitroanthraquinone Process for the preparation of pure 1-nitroanthraquinone

1973-11-16

1976-01-06

Weinberger, Lorraine

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

C07C 7937

Patent

active

039312526

ABSTRACT:
Process for the manufacture of pure 1-nitroanthraquinone, characterised in that a nitroanthraquinone mixture obtained by nitration of anthraquinone in the presence of inorganic acids and, optionally, lowering the molar fraction of the acids in the reaction mixture after isolation of the reaction products which have precipitated and, optionally, further measures, is subjected to a rectification.

REFERENCES:
patent: 2874168 (1959-02-01), Graham et al.
patent: 3766222 (1973-10-01), Hartwig et al.
patent: 3798243 (1974-03-01), Toth
patent: 3798244 (1974-03-01), Mueller et al.

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