Process for the manufacture of 1,4-diamino-5-nitroanthraquinone

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

1975-11-05

1976-08-31

Shaver, Paul F.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

C07C 9712, C07C 9724

Patent

active

039780953

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-anthraquinone 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 the 1,9-4,10-anthraquinone-disulphonimide with liquid sulphur trioxide and carrying out the entire nitration process by using liquid solvents which are inert towards the reactants.

REFERENCES:
patent: 2570866 (1951-10-01), Sargent et al.
patent: 3235549 (1966-02-01), Broussalian
patent: 3646071 (1972-02-01), Frey et al.
patent: 3654319 (1972-04-01), Neff
patent: 3818052 (1974-06-01), Hohmann
BIOS Final Report, No. 1484, p. 20.

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