公开(公告)号：MY140665A

公开(公告)日：2010-01-15

申请号：MYPI20063072

申请日：2006-06-28

Applicant: BASF AG

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

IPC: B01D53/14

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.