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 1114402
ABSTRACT OF THE DISCLOSURE 1,2-dichloroethane is made by subjecting ethylene to an oxychlorina- tion reaction with hydrogen chloride and air in gas phase, at a temperature in the range of from 200 to 250°C and in contact with a fluidized bed copper- II-chloride catalyst on a carrier, wherein the reaction gases are cooled under pressure in two condensation stages, condensed 1,2-dichloroethane and water are removed and the bulk of unreacted starting gas and inert gas are recycled. More specifically the reaction gases are delivered to a third con- densation stage and cooled therein under pressure down to a temperature within the range 5 to 18°C and to the extent necessary for the recycle gas to contain 0.5 to 3 volume % of 1,2-dichloroethano. Next, the recycle gas is directly admixed upstream of the reactor, with a quantity of pure oxygen necessary to replace consumed oxygen and re-establish an oxygen content of 12 to 25 volume % therein.
300922
Holler Ernst
Legutke Gunter
Liesenfelder Gunther
Rechmeier Gerhard
Scholz Harald
Fetherstonhaugh & Co.
Hoechst Aktiengesellschaft
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