公开(公告)号：CZ9901732A3

公开(公告)日：1999-09-15

申请号：CZ173299

申请日：1997-11-21

Applicant: BASF AG

Inventor： AICHINGER HEINRICH ,  FRIED MICHAEL ,  NESTLER GERHARD ,  DAMS ALBERT

IPC: C07C67/08 ,  C07C67/58 ,  C07C69/54

CPC classification number: C07C67/08 ,  C07C67/58 ,  Y02P20/584 ,  C07C69/54

公开(公告)号：CZ173299A3

公开(公告)日：1999-09-15

申请号：CZ173299

申请日：1997-11-21

Applicant: BASF AG

Inventor： AICHINGER HEINRICH ,  FRIED MICHAEL ,  NESTLER GERHARD ,  DAMS ALBERT

IPC: C07C67/08 ,  C07C67/58 ,  C07C69/54

Abstract: A process is described for preparing (meth)acrylic esters by reacting (meth)acrylic acid with C4-C12-alkanols in the presence of sulfuric acid or a mono-C4-C12-alkyl sulfate as catalyst, where the catalyst is regenerated by extraction with water from the reaction mixture and the aqueous catalyst solution is recycled back to the esterification, the concentration of unreacted alkanol in the reaction mixture to be extracted being not more than 5% by weight, based on the reaction mixture to be extracted.