Hydrogenation of aromatic amines to produce their ring hydrogena

Details Hydrogenation of aromatic amines to produce their ring hydrogena Hydrogenation of aromatic amines to produce their ring hydrogena

1993-06-25

1994-11-01

Hollrah, Glennon H.

Organic compounds -- part of the class 532-570 series

Organic compounds

Amino nitrogen containing

564452, 564450, 564306, 502325, 502326, C07C20972, C07C21126, B01J 2340, B01J 2104

Patent

active

053609344

ABSTRACT:
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: ##STR1## wherein R is hydrogen or C.sub.1-6 aliphatic, R1 and R2 are hydrogen or C.sub.1-6 aliphatic, A is C.sub.1-4 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.

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