公开(公告)号：DE1768460B1

公开(公告)日：1972-05-31

申请号：DE1768460

申请日：1968-05-16

Applicant: BASF AG

Inventor： NAGEL OTTO DR ,  PLATZ ROLF DR ,  TAGLIEBER KURT DIPL-ING ,  WEINFURTNER KURT DIPL-ING ,  WOLF DIETER DR

IPC: C07C7/00 ,  F25J3/02 ,  C07C7/02

Abstract: A gas mixture (obtained by thermal cracking of hydrocarbons followed by quenching of the cracked gas and freed from carbon dioxide and water) is separated into a gas mixture containing hydrogen, carbon monoxide and methane and another gas mixture containing ethylene, acetylene and higher hydrocarbons by (a) cooling the gas mixture which is at superatmospheric pressure in at least one condensation stage to a temperature which is above the solidification temperature of acetylene mixed with the other condensed constituents, (b) separating the condensate thus obtained and subdividing it in a rectifying column into a first mixture containing C2 hydrocarbons and a second mixture containing C3 and higher hydrocarbons, and (c) freeing the residual gas remaining from (a) from residual acetylene and ethylene in a scrubber by treatment with some of the mixture consisting of C3 and higher hydrocarbons from (b).