| abstract |
1. A method of recovering hydrogen chloride and organic chlorinated derivatives, formed from the chlorination of ethylene, a mixture of chlorine and hydrogen chloride, further containing carbon tetrachloride and perchlorethylene, using absorption, characterized by a stream of liquid reaction products consisting of 1,2-dichloroethane, carbon tetrachloride , perchlorethylene and hydrogen chloride at a temperature of 20 to 80 ° C, at a pressure of up to 0.5 MPa, is combined with a liquid stream consisting of 1,2-dichloroethane, carbon tetrachloride, perchlorethylene and hydrogen chloride flowing from the bottom of the absorption column and combined streams it goes to the top of the desorption column, whereby liquid chlorine derivatives of 1,2-dichloroethane, carbon tetrachloride and perchlorethylene are discharged from the bottom of the desorption column at 90 to 120 ° C, and simultaneously from the top of the desorption column at a temperature of Gaseous 1,2-dichloroethane and hydrogen chloride are collected at a pressure of up to 0.5 MPa at 50 to 80 ° C and It is poured into an absorption column sparged in countercurrent with 1,2-dichloroethane at -15 to -25 ° C, then pure hydrogen chloride gas is withdrawn from the top of the absorption column and combined with hydrogen chloride from the reactor. PL |