Abstract: A method for separating vinyl chloride, which comprises cooling a cracked gas obtained by cracking 1,2-dichloroethane by a thermal cracking furnace, firstly in a heat exchanger, then further cooling it in a quenching tower and then distilling it, wherein the cracked gas is cooled in the heat exchanger to at least 350.degree. C., the quenching tower is controlled so that from 80 to 98 wt % of the cracked gas introduced is withdrawn as an overhead product and the rest of from 20 to 2 wt % of the cracked gas is withdrawn as a bottom effluent, and they are respectively sent to the subsequent steps, and formed coke is discharged together with the bottom effluent.

Abstract: The present invention provides a method for removing an organic compound in water at a high efficiency by separating an organic compound, particularly such an organic chlorine compound as 1,2-dichloroethane, carbon tetrachloride and chloroform dissolved in water or forming two liquid phases with water from a water phase, by the steps of:(i) charging water containing an organic compound into a first distillation column for conducting distillation or steam distillation to take the organic compound and water out of the top of the first distillation column and to obtain a bottom liquor containing the organic compound at a lower content from the bottom of the first distillation column, and(ii) charging the bottom liquor of the first distillation column into a second distillation column operated at a pressure lower than that in the first distillation column for conducting distillation, preferably flashing under reduced pressure, to take a gas distillate containing a large amount of the organic compound out of the t