公开(公告)号：MY117845A

公开(公告)日：2004-08-30

申请号：MYPI9700099

申请日：1997-01-09

Applicant: BASF AG

Inventor： ENGERT GERD-JURGEN DR ,  MACHHAMMER OTTO DR ,  PROLL THEO DR ,  DOCKNER TONI DR

IPC: B01D9/02 ,  B01D3/00 ,  C07B61/00 ,  C07C51/235 ,  C07C51/25 ,  C07C51/43 ,  C07C51/48 ,  C07C57/04 ,  C07C57/05 ,  C07C57/055 ,  C07C57/07 ,  C07C69/54

Abstract: A PROCESS FOR PREPARING ACRYLIC ACID AND/OR ESTERS COMPRISES THE STEPS OF: (A)CATALYTIC GAS PHASE OXIDATION OF PROPENE AND/OR ACROLEIN TO ACRYLIC ACID TO OBTAIN A GASEOUS REACTION PRODUCT COMPRISING ACRYLIC ACID, (B) SOLVENT ABSORPTION OF THE REACTION PRODUCT, (C)DISTILLATION OF THE SOLVENT LOADED WITH ACRYLIC ACID TO OBTAIN A CRUDE ACRYLIC ACID AND THE SOLVENT, (D)PURIFICATION OF THE CRUDE ACRYLIC ACID BY CRYSTALLIZATION AND (E)OPTIONALLY ESTERIFICATION OF THE CRYSTALLINE ACRYLIC ACID. (FIG. 1)