Production of 1,2-dichloroethane
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United States of America Patent
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Jan 12, 1982
Grant Date -
N/A
app pub date -
Apr 24, 1978
filing date -
Apr 28, 1977
priority date (Note) -
Expired
status (Latency Note)
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Abstract
1,2-dichloroethane is made 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 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 condensation stage and cooled therein under pressure down to a temperature within the range 5.degree. to 18.degree. C. and to the extent necessary for the recycle gas to contain 0.5 to 3 volume % of 1,2-dichloroethane. 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.
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