METHOD FOR PURIFICATION OF ALIPHATIC AMINONITRILES Russian patent published in 2004 - IPC

FIELD: organic chemistry, chemical technology. SUBSTANCE: invention relates to method for purification of aliphatic aminonitriles, in particular, 6-aminocapronitrile that is necessary for preparing caprolactam as the parent material for polyamide-6. Aminonitrile is subjected for hydrogenation with molecular hydrogen in the presence of a catalyst taken among the group including: (1) metal-containing catalysts taken among palladium, platinum treated preliminary by contacting with agent improving selectivity before or at onset of hydrogenation reaction; (2) catalysts containing at least one metal taken among ruthenium, osmium, iridium, rhodium; (3) catalysts containing at least one metal taken among palladium, platinum, ruthenium, osmium, iridium, rhodium and one or some promoters, such as gold, silver, copper, chrome, molybdenum, tungsten, germanium, tin, lead, boron, gallium, indium, thallium, phosphorus, arsenic, antimony, bismuth, sulfur, selenium, tellurium, manganese, rhenium. EFFECT: improved purification method. 14 cl, 1 tbl