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. 17, 2004
Filed:
Oct. 30, 2002
Applicant:
Inventors:
Daniël Stephan Van Es, Bennekom, NL;
Augustinus Emmanuel Frissen, Wageningen, NL;
Hendrikus Luitjes, Putten, NL;
Assignee:
ATO B.V., Wageningen, NL;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07C 5/700 ;
U.S. Cl.
CPC ...
C07C 5/700 ;
Abstract
Diesters of dianhydroglycitols can be prepared by esterification of dianhydroglycitols, anhydroglycitols and/or glycitols with alkylcarboxylic or arylcarboxylic acids in the presence of an acid catalyst, the acid catalyst being a macroporous acid ion exchange resin. If glycitols or monoanhydroglycitols are used as the starting material, the reaction temperature is initially of the order of 120° C. and after the dehydration is approximately 140° C.