PROCESS FOR THE SEPARATION OF CIS- AND TRANS-1,2-DICHLOROETHYLENE FROM 1,1-DICHLOROETHANE BY ILLATION AND ISOMERIZATION PROCESS FOR PREPARING 1,1,1-TRICHLOROETHANE AND METHOD FOR THE REMOVAL OF CIS- AND TRANS-1, CHLOROETHYLENE FROM 1,1-DICHLOROETHANE BY SELECTIVE CHLORINATION

摘要

Methylchloroform is prepared by reacting ethylene and hydrogen chloride in the presence of AlCl3 to producc ethyl chloride, which is then reacted with Cl2 and ethyl chloroform at 400-550.degree.C; this reaction mixture is cooled to produce a gaseous fraction and a liquid fraction; a minor portion of the liquid fraction is returned to the cooling zone and the remainder ie mixed with the gaseous fraction and hydrochlorinated to form low boiling materials and polychlorinated ethanes; the low boiling materials are removed, and then sequentially there are separated 1,1-dichloroethane, cis- and trans-1,2-dichloroethylenes and methylchloroform.