Process for the preparation of 1-nitroanthraquinone

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

1975-07-09

1976-05-25

Shaver, Paul F.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

C07C 7910, C07C 7936, C09B 100

Patent

active

039593177

ABSTRACT:
Process for the preparation of 1-nitroanthraquinone by nitration of anthraquinone in the presence of highly concentrated nitric acid, characterised in that nitration is carried out at temperatures of 20.degree. to 80.degree.C, the reaction is terminated by lowering the nitric acid molar fraction in the reaction mixture to .ltoreq.0.85 by distilling off concentrated nitric acid and 1-nitroanthraquinone is precipitated by subsequently adjusting the nitric acid molar fraction to .ltoreq.0.7 to 0.4 and is separated off in a manner which is in itself known.

REFERENCES:
patent: 3766222 (1973-10-01), Hartwig et al.
patent: 3798243 (1974-03-01), Toth
patent: 3836601 (1974-09-01), Frey et al.

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