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. 27, 2008
Filed:
Jan. 24, 2005
Applicant:
Paul Marie Ayoub, Amsterdam, NL;
Inventor:
Paul Marie Ayoub, Amsterdam, NL;
Assignee:
Shell Oil Company, Houston, TX (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07C 59/00 (2006.01); C07C 69/66 (2006.01);
U.S. Cl.
CPC ...
Abstract
A process for the reactive extraction of levulinic acid from an aqueous mixture having levulinic acid, wherein the aqueous mixture is contacted with a liquid esterifying alcohol, the alcohol having at least four carbon atoms and is substantially water-immiscible, at esterification conditions in the presence of a catalyst to form a levulinate ester, wherein the amount of the alcohol is such that the alcohol extracts the levulinate ester from the aqueous mixture. Further, an aqueous phase, having the catalyst and a reduced levulinic acid content, and an organic phase, having the alcohol and the levulinate ester, are formed.