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:
Feb. 27, 2007
Filed:
Jul. 23, 2003
Kurt Schwirten, Frankenthal, DE;
Walter Disteldorf, Wachenheim, DE;
Günther Golfier, Frankenthal, DE;
Jarren Peters, Mannheim, DE;
Kurt Schwirten, Frankenthal, DE;
Walter Disteldorf, Wachenheim, DE;
Günther Golfier, Frankenthal, DE;
Jarren Peters, Mannheim, DE;
BASF Aktiengesellschaft, Ludwigshafen, DE;
Abstract
Process for removal of the esterification catalyst by separation from a crude plasticizer ester obtained by reacting a dicarboxylic acid with C–Calcohols, by treating the crude ester with an aqueous alkali solution in the range from 10 to 100° C. and then separating the aqueous alkaline phase comprising the hydrolyzed esterification catalyst by gravitational phase separation, by treating the crude ester, prior to or during the phase separation, with a salt of a di- or polyvalent metal, or with a mixture of these salts.