Patent ID: 7687655
Filing Date: 2010-03-30
Classification: C07C

Abstract:
1. A process for the production of dinitrile compounds by double hydrocyanation of a mixture of hydrocarbons containing at least one diolefin, which comprises: conducting a first hydrocyanation of the diolefins by reaction between the mixture of hydrocarbons and hydrocyanic acid in the presence of a catalytic system comprising a metal in the zero oxidation state and an organophosphorus ligand, separating the linear unsaturated nitriles from the reaction medium to form a first stream PN conducting, on this first stream PN separating from the reaction medium, by distillation, the unconverted unsaturated nitriles to form a second stream PN separating, in the reaction medium, the dinitrile compounds formed from the catalytic system by a liquid/liquid extraction with a solvent to form a first stream of dinitriles DN jointly feeding the said streams PN feeding the bottom fraction Q feeding the bottom fraction Q