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:
Mar. 10, 2009
Filed:
Feb. 17, 2006
Johannes Leendert Willem Cornelis Den Boestert, Amsterdam, NL;
Johannes Pieter Haan, Amsterdam, NL;
Arian Nijmeijer, Amsterdam, NL;
Johannes Leendert Willem Cornelis Den Boestert, Amsterdam, NL;
Johannes Pieter Haan, Amsterdam, NL;
Arian Nijmeijer, Amsterdam, NL;
Shell Oil Company, Houston, TX (US);
Abstract
A process for permeation enhanced reactive extraction of levulinic acid from a liquid aqueous phase comprising levulinic acid, wherein the levulinic acid from the aqueous phase is brought into contact with a liquid alcohol phase at esterification conditions in the presence of a catalyst at a temperature in the range of from 50 to 250° C., the aqueous phase and the alcohol phase being separated from each other by a membrane, and an aqueous stream depleted in levulinic acid and an alcohol stream comprising ester of levulinic acid are formed.