Process for the partial reduction of polynitrated diaryl compoun

Details Process for the partial reduction of polynitrated diaryl compoun Process for the partial reduction of polynitrated diaryl compoun

1980-04-14

1982-09-07

Chan, Nicky

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

260509, 260510, 564416, 564417, 564307, 564315, C07C14329

Patent

active

043483356

ABSTRACT:
Polynitrated diaryl compounds of the formula given in the description are reduced with 1-2 mols of sulphides, or compounds which donate sulphide ions, per mol of nitro group in the presence of 0.5-10 mols of ammonia per mol of starting compound at 30.degree.-110.degree. C. to give nitroamino-diaryl compounds, for example 4,4'-dinitro-dibenzyl-2,2'-disulphonic acid is reduced to 4-nitro-4'-amino-stilbene-2,2'-disulphonic acid.

REFERENCES:
patent: 2149474 (1939-03-01), Straub et al.
patent: 2649479 (1953-08-01), Zickendraht
patent: 2669584 (1954-02-01), Lowe
patent: 4115652 (1978-09-01), Linhart et al.
Sarbort et al., Chem. Abstract, 86, 155,368a (1977) (Abstract of Czechoslovakian Patent 165,231).
Grundlegende Operation en der Farbenchemie, pp. 109-110 (1952).

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