Hydrogenation of aromatic amines to produce their ring hydrogenated counterparts

摘要

This invention relates to an improved hydrogenation process wherein aromatic amines are hydrogenated to their ring hydrogenated counterparts. These aromatic amines are presented by the formulas: <IMAGE> I <IMAGE> II wherein R is hydrogen or C1-6 aliphatic, R1 and R2 are hydrogen or C1-6 aliphatic, A is C1-4 or NH; n is 0-2, x is 1-3 and y is 1 to 2 except the sum of the y groups in Formula I may be 1. The improvement resides in the utilization of a catalyst comprising rhodium carried on a support of kappa, theta or delta alumina.