公开(公告)号：DE102005031314A1

公开(公告)日：2007-01-18

申请号：DE102005031314

申请日：2005-07-05

Applicant: BASF AG

Inventor： WINDECKER GUNTHER ,  WECK ALEXANDER ,  STEINIGER MICHAEL ,  BREDEHOEFT JAN PETER ,  CARDONE BIANCA ,  KNAPPIK PETER ,  VANDEN HAUTTE DANY ,  PIERRE BERNARD ,  HAFFNER BEATRIX

IPC: C07D307/32 ,  B01D3/34 ,  C07C27/04 ,  C07C31/20 ,  C07C67/08 ,  C07C67/48 ,  C07D307/08 ,  C07D307/20

Abstract: The invention relates to a process for separating off maleic anhydride from a gas stream comprising maleic anhydride, in which a) the gas stream comprising maleic anhydride is brought into contact with a liquid absorbent phase comprising at least one high-boiling inert absorption medium for maleic anhydride and b) maleic anhydride is separated off from the resulting liquid absorbate phase by stripping with a hydrogen-comprising gas as stripping medium in a column, wherein the stripping medium is fed in at two points on the column which are at least one theoretical plate apart.