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Selective aerobic alcohol oxidation method for conversion of lignin into simple aromatic compounds

United States Patent

March 3, 2015
View the Complete Patent at the US Patent & Trademark Office
Described is a method to oxidize lignin or lignin sub-units. The method includes oxidation of secondary benzylic alcohol in the lignin or lignin sub-unit to a corresponding ketone in the presence of unprotected primarily aliphatic alcohol in the lignin or lignin sub-unit. The optimal catalyst system consists of HNO.sub.3 in combination with another Bronsted acid, in the absence of a metal-containing catalyst, thereby yielding a selectively oxidized lignin or lignin sub-unit. The method may be carried out in the presence or absence of additional reagents including TEMPO and TEMPO derivatives.
Stahl; Shannon S. (Madison, WI), Rahimi; Alireza (Madison, WI)
Wisconsin Alumni Research Foundataion (Madison, WI)
13/ 771,733
February 20, 2013
FEDERAL FUNDING STATEMENT This invention was made with government support under DE-FC02-07ER64494 awarded by the US Department of Energy. The government has certain rights in the invention.