Process for the manufacture of 1,4-diamin O-5-nitroanthraquinone

Details Process for the manufacture of 1,4-diamin O-5-nitroanthraquinone Process for the manufacture of 1,4-diamin O-5-nitroanthraquinone

1975-11-05

1976-08-31

Shaver, Paul F.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

260369, C07C 9712, C07C 9724

Patent

active

039780945

ABSTRACT:
A process for the manufacture of 1,4-diamino-5-nitroanthraquinone from 1,4-diaminoanthraquinone by nitration with mixed nitric and sulphuric acid, before which nitration a masking of the two amino groups to form 1,9-4,10-anthraauinone-disulphonimide takes place, this intermediate being in turn split by hydrolysis after the nitration, which process comprises carrying out the masking of the 1,4-diaminoanthraquinone to form 1,9-4,10 anthraquinone-disulphonimide in concentrated sulphuric acid which can optionally contain dissolved SO.sub.3, or in concentrated phosphoric acid using liquid sulphur trioxide.

REFERENCES:
patent: 3235549 (1966-02-01), Broussalian
patent: 3818052 (1974-06-01), Hohmann
Bios. Final Report No. 1484, p. 20.

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