Production of 1,2-dichloroethane

Details Production of 1,2-dichloroethane Production of 1,2-dichloroethane

1979-04-27

1981-05-05

Douglas, Winston A.

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

Organic compounds

Halogen containing

C07C 1702

Patent

active

042658373

ABSTRACT:
The invention provides a process for making 1,2-dichloroethane by subjecting ethylene to an oxychlorination reaction with hydrogen chloride and a gas containing molecular oxygen, in gas phase, at elevated temperature and in contact with a fluidized bed catalyst of copper-II-chloride on a carrier, wherein the reaction gases are cooled under pressure in two condensation stages, condensed 1,2-dichloroethane and water are removed, the bulk of unreacted starting gas and inert gas are recycled, the reaction gases coming from the second condensation stage are delivered to a third condensation stage, cooled therein under pressure down to a temperature within the range 5.degree. to 18.degree. C. and to the extent necessary to retain in the recycle gas 0.5 to 3 volume % of 1,2-dichloroethane, and the recycle gas is admixed, directly upstream of the reactor, with a quantity of pure oxygen necessary to replace consumed oxygen. The present process provides more specifically for preheated hydrogen chloride to be wholly or partially introduced into the recycle gas heated to 150.degree. to 200.degree. C. and for the latter to be then admixed with pure oxygen, the oxygen being admitted at a point lying between the hydrogen chloride feed point and the feed point of the recycle gas into the reactor.

REFERENCES:
patent: 3637895 (1972-01-01), Riegel et al.
patent: 4028427 (1977-07-01), Tsao
patent: 4071572 (1978-01-01), Amato et al.

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