Patent ID: 9233908
Filing Date: 2016-01-12
CPC Classification: C07C

Claim Text:
1. A process for producing cycloaliphatic diamines comprising the steps of: feeding one or more cycloaliphatic cyanoaldehydes selected from the group consisting of 3-cyanocyclohexane-1-carboxaldehyde, 4-cyanocyclohexane-1-carboxaldehyde, mixtures thereof, and combinations thereof, hydrogen, and ammonia into a reductive amination reactor system; contacting said one or more cycloaliphatic cyanoaldehydes, hydrogen, and ammonia with each other in the presence of one or more heterogeneous metal based catalyst systems at a temperature in the range of from 80° C. to about 160° C. and a pressure in the range of from 700 to 3500 psig, wherein said catalyst system has a space velocity in the range of from 0.1 to 5.0 per hour, wherein space velocity is defined as the ratio of the mass of the mixture of one or more cycloaliphatic cyanoaldehydes to the mass of catalyst per hour; thereby forming one or more cycloaliphatic diamines, wherein said one or more cycloaliphatic diamines are diamines selected from the group consisting of 1,3-bis(aminomethyl)cyclohexane, 1,4-bis(aminomethyl)cyclohexane, combinations thereof, and mixtures thereof.