Process and apparatus for recovering 1,2-dichloroethane from off

Details Process and apparatus for recovering 1,2-dichloroethane from off Process and apparatus for recovering 1,2-dichloroethane from off

1987-07-27

1988-11-29

Mars, Howard T.

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

Organic compounds

Halogen containing

570245, 570212, 55162, 422116, C07C 1715, C07C 1738

Patent

active

047883596

ABSTRACT:
1,2-dichloroethane is continuously and completely removed and recovered from the off-gas obtained during the production of 1,2-dichloroethane by subjecting ethylene to an oxychlorination reaction with hydrogen chloride and oxygen. The off-gas is initially contacted with active carbon, then incinerated at temperatures higher than 900.degree. C. and ultimately freed from hydrogen chloride and chlorine, and the active carbon is freed from 1,2-dichloroethane and regenerated by treating it with hot steam. More particularly, the off-gas loaded with the 1,2-dichloroethane and having a temperature of 1.degree. C. to 10.degree. C. is heated to a temperature at least 20.degree. C. higher than the respective dew point of water and contacted with the active carbon.

REFERENCES:
patent: 3186144 (1965-06-01), Dow
patent: 3238701 (1966-03-01), Holt
patent: 4310713 (1982-01-01), Legutke et al.

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