Process for - co-production of 6-aminocapronitrile and hexamethylenediamine from adiponitrile

摘要

A process for coproduction of 6-aminocapronitrile and hexamethylenediamine starting from adiponitrile comprises(1) partially hydrogenating adiponitrile in the presence of a catalyst to obtain a mixture comprising 6-aminocapronitrile, hexamethylenediamine and adiponitrile,(2) removing 6-aminocapronitrile and hexamethylenediamine from the mixture,(3) adding to the portion comprising essentially adiponitrile from 0.01 to 10% by weight of an acid, based on adiponitrile, or an acidic ion exchanger and removing the adiponitrile from the mixture, and(4) recycling the adiponitrile into step (1).