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. 05, 2013
Filed:
May. 25, 2011
Applicants:
James Dumesic, Verona, WI (US);
Jesse Bond, Madison, WI (US);
David Alonso, Madison, WI (US);
Thatcher Root, Madison, WI (US);
Inventors:
James Dumesic, Verona, WI (US);
Jesse Bond, Madison, WI (US);
David Alonso, Madison, WI (US);
Thatcher Root, Madison, WI (US);
Assignee:
Wisconsin Alumni Research Foundation, Madison, WI (US);
Primary Examiner:
Int. Cl.
CPC ...
C07C 59/185 (2006.01); C07C 51/48 (2006.01); C07D 307/33 (2006.01);
U.S. Cl.
CPC ...
Abstract
A method to produce levulinic acid (LA) and γ-valerolactone (GVL) from biomass-derived cellulose by selective extraction of LA by alkylphenol (AP) and hydrogenation of LA, in which mineral acid used in the method is recycled and the final concentration of GVL is increased by successive extraction/hydrogenation steps to allow for effective separation by distillation.