PURIFICATION PROCESS FOR CRUDE N-PARAFFINONE OXIMES

摘要

PURIFICATION PROCESS(D#71,963-F)ABSTRACT OF THE DISCLOSUREThis invention concerns a process for purifyingcrude oximes, particularly crude n-paraffinone oximes con-taining carbonyl and/or chlorine contaminants, consistingessentially of treating said crude oximes with urea orthiourea, in the presence of water and lower alkanol,heating to decompose thermally unstable contaminants,filtering off the insoluble urea (or thiourea) carbonylcomplexes formed, leaving a purified oxime which can befurther purified by conventional purification methods suchas vacuum distillation.I