Patent ID: 6559333
Filing Date: 2003-05-06
Classification: C07C

Abstract:
A process for the purification of aminonitrile, comprising subjecting aminonitrile to hydrogenation with molecular hydrogen in the presence of a catalyst comprising at least one metal selected from the group consisting of palladium, platinum, ruthenium, osmium, iridium and rhodium, and wherein said catalyst comprises one or more promoter elements selected from the group consisting of gold, silver, copper, chromium, molybdenum, tungsten, germanium, tin, lead, boron, gallium, indium, thallium, phosphorus, arsenic, antimony, bismuth, sulphur, selenium, tellurium, manganese, rhenium, vanadium, titanium and zinc or said catalyst is subjected to a preconditioning stage which comprises bringing the catalyst into contact with a selectivating agent before or at the beginning of the hydrogenation reaction.