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

1986-05-27

1988-05-31

Bascomb, Wilbur

Distillation: processes, separatory

And recovering heat by indirect heat exchange

Utilizing recovered heat for heating feed

203 25, 203 29, 203 73, 203 87, 203DIG9, 570216, 570262, B01D 314, C07C 1738

Patent

active

047479140

ABSTRACT:
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.degree. to 180.degree. C. in such a way that the bottom product contains not more than 7% by weight of high-boilers. The purified, vaporous 1,2-dichloroethane discharged at the head of this column is used to heat product 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, together with a feed composed of vaporous 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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