Method for purifying 1,2-dichloroethane

Details Method for purifying 1,2-dichloroethane Method for purifying 1,2-dichloroethane

1982-09-28

1985-03-26

Sever, Frank

Organic compounds -- part of the class 532-570 series

Organic compounds

Halogen containing

203 51, 203 67, B01D 334

Patent

active

045075140

ABSTRACT:
An improvement of a method for purifying 1,2-dichloroethane by passing through a distillation column a crude 1,2-dichloroethane produced by oxychlorination of ethylene with at least one of a crude 1,2-dichloroethane produced by direct chlorination of ethylene and a crude uncracked 1,2-dichloroethane recovered in thermal cracking of 1,2-dichloroethane, the improvement which comprises feeding the oxychlorination-produced 1,2-dichloroethane to an upper plate of the distillation column which is above a plate of the column to which at least one of the direct chlorination-produced 1,2-dichloroethane and the uncracked 1,2-dichloroethane is fed, and recovering 1,2-dichloroethane as a bottom product. The purification method is very useful in the production of vinyl chloride by thermal cracking of 1,2-dichloroethane since carbon tetrachloride effective as a thermal cracking catalyst is recovered in concentrations stabilized within the range of .+-.500 p.p.m. with 1,2-dichloroethane, while removing other low boiling impurities, and since the method is economically practiced.

REFERENCES:
"Vinyl Chloride", in Hydrocarbon Processing, Nov. 1975, at p. 216.

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