Patent ID: 8278474

Claim:
A process for separating mixtures of isomeric pentenenitriles, in which at least one isomer is depleted from the mixture, which comprises effecting the separation of the mixtures of isomeric pentenenitriles selected from the group consisting of mixtures comprising 2-methyl-3-butenenitrile and 3-pentenenitrile, mixtures comprising 2-methyl-3-butenenitrile and (Z)-2-methyl-2-butenenitrile, mixtures comprising cis-2-pentenenitrile and 3-pentenenitrile and mixtures comprising (E)-2-methyl-2-butenenitrile and 3-pentenenitrile by distilling under a pressure of from 0.001 to 1 bar without the addition of a liquid diluent.