Process for removing cations from an isophoronenitrile product mixture

A process for removing a cation from an isophoronenitrile product mixture, said process comprising:

• exchanging a cation other than hydrogen in said isophoronenitrile product mixture with a hydrogen cation, to obtain a purified product;
• wherein said isophoronenitrile product mixture is from the preparation of isophoronenitrile from isophorone and hydrocyanic acid in the presence of a cation-containing catalyst in homogeneous phase in a reactor;
• wherein said cation is from the cation-containing catalyst;
• wherein said exchanging of the cation of the catalyst takes place by a cation exchanger without prior neutralization of the catalyst.