Chlorohydrocarbon treatment with phos- - phites or phosphonates

摘要

Organic phosphite ester of b.pt. above 120 degrees C or phosphonate R-P(=O)(Or')(OR") (where R is alkyl or aryl and R' and R" are identical or different alkyl or aryl groups) is added to the Fe-contaminated chlorohydrocarbon in an amount such that weight ratio ester:Fe is over 5:1, and chlorohydrocarbon is distilled off. Treatment prevents tar and resin formation.