Patent ID: 6462220
Filing Date: 2002-10-08
Classification: C07C

Abstract:
A process for the coproduction of 6-aminocapronitrile and hexamethylenediamine starting from adiponitrile, which comprises the steps ofa) hydrogenating adiponitrile in the presence of a catalyst comprising an element of the eight transition group as catalytically active component, to obtain a mixture comprising 6-aminocapronitrile, hexamethylenediamine adiponitrile and components having a boiling point above that of adiponitrile, b) distillatively removing hexamethylenediamine from the mixture comprising 6-aminocapronitrile, hexamethylenediamine, adiponitrile and components having a boiling point above that of adiponitrile, and either c1) distillatively removing 6-aminocapronitrile, and then d1) distillatively removing adiponitrile, or c2) simultaneously distillatively removing 6-aminocapronitrile and adiponitrile into separate fractions, steps d1) or c2) carried out at base of column temperature below 185Â° C.