The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 09, 2003
Filed:
May. 11, 2001
Applicant:
Inventors:
Heinrich Aichinger, Mannheim, DE;
Holger Herbst, Frankenthal, DE;
Gerhard Nestler, Ludwigshafen, DE;
Jürgen Schröder, Ludwigshafen, DE;
Stefan Beckmann, Bad Dürkheim, DE;
Assignee:
BASF Aktiengesellschaft, Ludwigshafen, DE;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C07C 6/954 ; C07C 6/700 ; C07C 5/718 ; C07C 3/334 ; C07C 2/920 ;
U.S. Cl.
CPC ...
C07C 6/954 ; C07C 6/700 ; C07C 5/718 ; C07C 3/334 ; C07C 2/920 ;
Abstract
In a process for esterifying (meth)acrylic acid with an alkanol in the presence of an esterification catalyst, in which unconverted starting compounds and (meth)acrylic ester to be formed are separated off by distillation and an oxyester-containing bottom product is formed, the bottom product is first separated off and then the oxyesters contained in it are cleaved in the presence of a relatively long-chain alkylbenzenesulfonic acid at elevated temperatures.