Catalytic hydrogenation of di (4-aminophenyl) methane

Details Catalytic hydrogenation of di (4-aminophenyl) methane Catalytic hydrogenation of di (4-aminophenyl) methane

1981-06-01

1983-07-19

Doll, John

Organic compounds -- part of the class 532-570 series

Organic compounds

Amino nitrogen containing

564450, C07C 8524

Patent

active

043945236

ABSTRACT:
The present invention relates to an improved process for the catalytic hydrogenation of di(4-aminophenyl) methane to a liquid di(4-aminocyclohexyl) methane mixture containing from 15 to 40% by weight of the trans, trans isomer. The invention resides in the use of a ruthenium-on-alumina catalyst, the use of an aliphatic alcohol during hydrogenation and the use of ammonia during hydrogenation, with the hydrogenation being conducted under specific process conditions. The hydrogenation reaction is conducted for no more than about sixty minutes at a temperature of from 150.degree. to 217.degree. C. and at a hydrogen pressure of at least 500 psi.

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