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:
May. 26, 2009
Filed:
Mar. 30, 2005
Liliana Craciun, Carmel, NY (US);
Gerald P. Benn, Bradford, GB;
John Dewing, Bradford, GB;
George W. Schriver, Fort Lee, NJ (US);
William J. Peer, Patterson, NJ (US);
Bernd Siebenhaar, Kandern-Wollback, DE;
Urs Siegrist, Frick, CH;
Liliana Craciun, Carmel, NY (US);
Gerald P. Benn, Bradford, GB;
John Dewing, Bradford, GB;
George W. Schriver, Fort Lee, NJ (US);
William J. Peer, Patterson, NJ (US);
Bernd Siebenhaar, Kandern-Wollback, DE;
Urs Siegrist, Frick, CH;
Ciba Specialty Chemicals Corporation, Tarrytown, NY (US);
Abstract
The invention is directed to a process for the preparation of α,β-unsaturated acids, esters and amides from α- or β-hydroxycarboxylic acids or esters or precursors in high yields and high selectivity. The α,β-unsaturated acids or esters are optionally prepared in the presence of specific dehydration and/or esterification catalysts. The α,β-unsaturated amides or substituted amides are prepared optionally in the presence of a dehydration and/or amidation catalyst. The source of α- or β-hydroxycarboxylic acids or precusor is preferably from a renewable resource. The precursor is defined herein.