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:
Apr. 23, 2002
Filed:
May. 07, 1996
Subhash Prataprao Chavan, Maharashtra, IN;
Shubhada Wasudeo Dantale, Maharashtra, IN;
Alive Keshavaraja, Karnataka, IN;
Arumugamangalam Venkataraman Ramaswamy, Maharashtra, IN;
Puduklatan Kadar Zubaidha, Madras, IN;
Council of Scientific & Industrial Research, New Delhi, IN;
Abstract
A process for the transesterification of keto esters and alcohols in approximately stoichiometric amounts using a solid acid catalyst. Solid acid catalysts may be sulfated zirconia, sulfated tin oxide, sulfated titania, sulfated iron oxide, heteropoly acids, acidic clays, acidic zeolites, or any other solid acids with high acidity or super acidity, with or without dopants. One equivalent or more of keto ester, one equivalent or more of alcohol, the solid acid catalyst, and an appropriate solvent are mixed and heated to 70 to 120° C. at atmospheric or reduced pressure to furnish the keto transester in high yields.