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:
Mar. 27, 2001
Filed:
Oct. 07, 1994
Applicant:
Inventors:
Toni Dockner, Meckenheim, DE;
Gerhard Nestler, Ludwigshafen, DE;
Holger Herbst, Frankenthal, DE;
Helmut Lermer, Ludwigshafen, DE;
Hans Martan, Frankenthal, DE;
Herbert Vogel, Ludwigshafen, DE;
Herbert Exner, Waldsee, DE;
Assignee:
BASF Aktiengesellschaft, Ludwigshafen, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B01D 3/34 ; C07C 5/144 ;
U.S. Cl.
CPC ...
B01D 3/34 ; C07C 5/144 ;
Abstract
Crude (meth)acrylic acid is purified by a process in which a primary amine compound and an organic sulfonic acid are added to the crude (meth)acrylic acid and the latter is then worked up by distillation.