C - Chemistry – Metallurgy – 07 – C
Patent
C - Chemistry, Metallurgy
07
C
260/660.3
C07C 19/045 (2006.01) C07C 17/156 (2006.01)
Patent
CA 1113507
PRODUCTION OF 1,2-DICHLOROETHANE ABSTRACT OF THE DISCLOSURE: The invention provides a process for making 1,2-dichlo- roethane by subjecting ethylene to an oxychlorination reac- tion with hydrogen chloride and a gas containing molecular oxygen, in gas phase, at elevated temperature and in con- tact 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-dichlo- roethane and water are removed, the bulk of unreacted star- ting 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 pressu- re down to a temperature within the range 5 to 18°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 in- to the recycle gas heated to 150 to 200°C and for the lat- ter 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.
325612
Legutke Gunter
Scholz Harald
Schuchardt Kurt
Fetherstonhaugh & Co.
Hoechst Aktiengesellschaft
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