Process for purifying the oximes containing carbonyl and chlorinated

摘要

This invention concerns a process for purifying crude oximes, particularly crude n-paraffinone oximes containing carbonyl and/or chlorine contaminants, consisting essentially of treating said crude oximes with urea or thiourea, in the presence of water and lower alkanol, heating to decompose thermally unstable contaminants, filtering off the insoluble urea (or thiourea) carbonyl complexes formed, leaving a purified oxime which can be further purified by conventional purification methods such as vacuum distillation.