Catalytic hydrogenation of di(4-aminophenyl)methane

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

B - Operations, Transporting

01

J

260/605.7

B01J 23/46 (2006.01)

Patent

CA 1190566

CATALYTIC HYDROGENATION OF DI(4-AMINOPHENYL)METHANE ABSTRACT OF THE DISCLOSURE The present invention relates to an improved process for the catalytic hydrogenation of di(4-amino- phenyl)methane to a liquid di(4-aminocyclohexyl)- methane mixture containing from 15 to 40% by weight and preferably from 18.5 to 23.5% by weight, of the trans, trans isomer. The invention resides in the use of an unsupported ruthenium dioxide catalyst under specific process conditions. During the hydrogenation reaction, a pressure of at least 2500 psi and a temperature of from 150 to 210°C must be maintained.

400861

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