Patent ID: 7060857
Filing Date: 2006-06-13
Classification: B01J,C07C

Abstract:
1. A process for preparing 3-aminome-thyl-3,5,5-trimethylcyclohexylamine (isophoronediamine, IPDA) having a cis/trans isomer ratio of at least 70/30 from 3cy-ano-3,5,5-trimethylcyclohexanone (isophotonenitrile, IPN), NH 3 and H 2 in presence of a hydrogenation catalyst comprising from 55 to 98% by weight of cobalt, from 0.2 to 15% by weight of phosphorus and from 0.2 to 15% by weight of manganese, in each case calculated as oxide referring to the total weight of the catalyst, at a temperature of from 50 to 200° C. and a pressure of from 50 to 300 bar, wherein the hydrogenation catalyst has an alkali metal content of ≦0.03% by weight, calculated as alkali metal oxide referring to the total weight of the catalyst.