Process for the purification of 1,2-dichloroethane

Details Process for the purification of 1,2-dichloroethane Process for the purification of 1,2-dichloroethane

C - Chemistry, Metallurgy

07

C

202/76, 260/663.

C07C 17/38 (2006.01) C07C 19/045 (2006.01)

Patent

CA 1279658

Abstract of the disclosure A process for the purification of 1,2-dichloroethane is described, in which the crude product, containing not more than 3% by weight of high-boilers, is distilled in a first column at 125 to 180°C in such a way that the bottom product contains not more than 7% by weight of high- boilers. The purified, gaseous 1,2-dichloroethane dis- charged at the head of this column is used to heat pro- duct streams containing 1,2-dichloroethane. The bottom product from the first column is distilled in a second column, advantageously at a pressure of 5 to 40 kPa, to- gether with a feed composed of gaseous 1,2-dichloroethane obtained from the reaction of ethylene with chlorine. The process makes it possible to purify 1,2-dichloroethane with a saving in energy.

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