Patent ID: 7816551
Filing Date: 2010-10-19
Classification: C07C

Abstract:
1. A process for preparing adiponitrile and methylglutaronitrile, characterized by the following process steps: (a) reacting a reactant stream comprising pentenenitriles with hydrogen cyanide in the presence of at least one catalyst and of at least one promoter to obtain a reaction stream which comprises pentenenitriles, the at least one nickel(0)-phosphorus ligand complex as a catalyst, catalyst degradation products, the at least one Lewis acid as a promoter, adiponitrile and methylglutaronitrile, (b) distilling the reaction stream to obtain a stream (c) extracting the stream (d) adding 3-pentenenitrile to the stream (e) distilling the stream (f) distilling the stream wherein the stream (g) distilling the stream (h) distilling the stream