公开(公告)号：DE50001029D1

公开(公告)日：2003-02-13

申请号：DE50001029

申请日：2000-05-18

Applicant: BASF AG

Inventor： DAMS DR ,  AICHINGER DR ,  HERBST DR ,  NESTLER DR ,  SCHROEDER DR

IPC: C07C67/08 ,  C07C67/327 ,  C07C69/54

Abstract: The cracking residues of the oxyester-containing sump product which has been obtained after distilling off unreacted materia and the ester in the catalysed esterification of (meth)acrylic acid with an alcohol are combined with the distillation residue a then hydrolysed in the presence of water and acids or bases. Catalysed esterification of (meth)acrylic acid with an alcohol involves distilling off the unreacted materials and the este leave an oxyester-containing sump product which is either: (a) optionally treated with (meth)acrylic acid or oligomeric acid and then cracked using an acid catalyst other than a (meth)acrylic acid or oligomer, with the cracked product removed to leave a cracking residue; or (b) distilled to remove the oxyester and leave a distillation residue, with the oxyester then being optionally treated and cracked as per (a) above. The novel feature is that the cracking residue from (a) or (b) is hydrolysed together with the distillation residue in the presence of water and acids or bases.