Process for manufacturing aromatic diamines

Details Process for manufacturing aromatic diamines Process for manufacturing aromatic diamines

1975-07-09

1977-01-25

Demers, Arthur P.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

252430, 260580, C07C 9326, C07C 8511

Patent

active

040051439

ABSTRACT:
Aromatic diamines having the formula ##STR1## wherein R is alkyl or alkoxy having up to 6 carbon atoms are prepared by treating dinitro compounds having the formula ##STR2## wherein R is as previously defined, with hydrogen in the presence of one or more noble metals from the platinum or palladium groups as catalysts, optionally on catalyst supports, and in the presence of optionally substituted aniline as the solvent.
The catalyst is generally used in amounts of 0.0005 to 0.1% by weight based on the amount of dinitro compound employed.

REFERENCES:
patent: 1793941 (1931-02-01), Laux
patent: 2164154 (1939-06-01), Henke et al.
patent: 2292879 (1942-08-01), Kise
patent: 2894036 (1959-07-01), Graham
patent: 3232989 (1966-02-01), Graham

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