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:
Jan. 08, 2013
Filed:
Dec. 03, 2005
Applicants:
Dirk Leinweber, Schwalbach, DE;
Tobias Rau, Mainz, DE;
Inventors:
Dirk Leinweber, Schwalbach, DE;
Tobias Rau, Mainz, DE;
Assignee:
Clariant Produkte (Deutschland) GmbH, Frankfurt am Main, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07D 307/36 (2006.01); C07D 307/34 (2006.01);
U.S. Cl.
CPC ...
Abstract
The invention relates to a method for producing alkenyl succinic anhydrides of formula (1), in which R represents a C4 to C250 alkylene radical that can be linear or branched. The method involves the reaction of maleic acid, maleic anhydride, fumaric acid or esters thereof and an alkene which contains 4-250 carbon atoms at from 150 to 250° C. in the presence of a synergistic mixture of a primary antioxidant, a secondary antioxidant, and a metal deactivator.