Process for the joint production of aromatic amines and iron oxi

Details Process for the joint production of aromatic amines and iron oxi Process for the joint production of aromatic amines and iron oxi

1977-11-17

1979-03-20

Douglas, Winston A.

Compositions: coating or plastic

Materials or ingredients

Miscellaneous

423632, 423633, 423634, 260580, C09C 124

Patent

active

041452283

ABSTRACT:
Aromatic amines and iron oxide pigment are produced by reacting a ferrous salt, a reduceable aromatic nitrogen compound chosen from nitroderivatives with a single nitro-group or with two nitro-groups and azoderivatives, and a basic compound, chosen from hydroxides and carbonates of ammonium, alkali metals and alkaline earth metals, operating at 25.degree.-200.degree. C. in an aqueous medium. The color of the pigment can be varied from yellow to black by increasing the reaction temperature and the molar ratio between ferrous salt and aromatic nitrogen compound.

REFERENCES:
patent: 1793941 (1931-02-01), Laux
patent: 1849428 (1932-03-01), Laux
patent: 2866686 (1958-12-01), Bennetch
patent: 3619137 (1971-11-01), Ratcliffe

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