Process for removing and recovering still full of 1,2-dichloroethane from the waste gases formed in the preparation of 1.2 - dichloroethane by oxicloracao of ethylene with hydrogen chloride and oxygen and device for its implementation

摘要

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 DEG 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 DEG C. to 10 DEG C. is heated to a temperature at least 20 DEG C. higher than the respective dew point of water and contacted with the active carbon.