Patent ID: 9126886
Filing Date: 2015-09-08
Classification: B01D,C07B,C07C

Abstract:
1. A method for removing a tertiary chlorinated hydrocarbon impurity from 1,3-dichloro-1-propene, comprising: providing a first mixture comprising 1,3-dichloro-1-propene and a tertiary chlorinated hydrocarbon impurity; contacting the first mixture containing the tertiary chlorinated hydrocarbon impurity with a dehydrochlorination catalyst effective to catalyze a conversion of the tertiary chlorinated hydrocarbon impurity to a corresponding unchlorinated or less-chlorinated unsaturated hydrocarbon and hydrogen chloride; and distilling the 1,3-dichloro-1-propene to separate and recover a purified cis-1,3-dichloro-1-propene fraction and a purified trans-1,3-dichloro-1-propene fraction; wherein the tertiary chlorinated hydrocarbon impurity comprises an impurity selected from the group consisting of 2-chloro-2-methylpentane, 2-chloro-2,3-dimethylbutane, 4-chloro-4-methyl-1-pentene and mixtures thereof.