Hydrogenation of methylenedianiline to produce bis...

Details Hydrogenation of methylenedianiline to produce bis... Hydrogenation of methylenedianiline to produce bis...

C - Chemistry, Metallurgy

07

C

260/605.7

C07C 211/54 (2006.01) B01J 23/46 (2006.01) C07C 65/24 (2006.01) C07C 209/68 (2006.01)

Patent

CA 1271491

ABSTRACT This invention relates to an improved hydrogenation process wherein methylenedianiline is reduced to form bis(para-aminocyclohexyl)methane (PACM). The process contemplates contacting methylenedianiline and hydrogen in the presence of a two component metal catalyst comprising rhodium and ruthenium under mild hydrogenation conditions. Use of the mixed metal catalyst system allows one to obtain a preselected isomer ratio having from about 5-40% by weight, typically 14-28% by weight of the trans,trans- configurational isomer.

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