METHOD FOR ISOLATION OF FINE DISPERSED, GUMMY AND HIGH BOILING BY-PRODUCTS FROM DICHLOROETHANE PYROLYSIS REACTION GASES FROM VINYLCHLORIDE PRODUCTION

摘要

FIELD: chemical technology, in particular method for vinylchloride production. ^ SUBSTANCE: claimed method includes fast gas cooling in quenching column followed by separation of pyrolysis products. Quenching and separation are carried out by barbotage through the layer of liquid concentrated by-products of these gases in quenching column cube. Then steam/gas mixture is brought into contact with returning condensate in regular filling layer of rectification tower with simultaneous purification of steam/gas mixture in rectification zone upstream. Liquid concentrated by-products are additionally rectified in vacuum with isolating and recovery of products having boiling point higher than the same for dichloroethane and distillate recycling. Method of present invention also makes it possible to produce perchloroethylene and tricloroethylene. ^ EFFECT: vinylchloride of high quality; reduced effort and energy consumption. ^ 2 tbl, 4 dwg, 2 ex