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Method to produce water-soluble sugars from biomass using solvents containing lactones

United States Patent

June 2, 2015
View the Complete Patent at the US Patent & Trademark Office
A process to produce an aqueous solution of carbohydrates that contains C6-sugar-containing oligomers, C6 sugar monomers, C5-sugar-containing oligomers, C5 sugar monomers, or any combination thereof is presented. The process includes the steps of reacting biomass or a biomass-derived reactant with a solvent system including a lactone and water, and an acid catalyst. The reaction yields a product mixture containing water-soluble C6-sugar-containing oligomers, C6-sugar monomers, C5-sugar-containing oligomers, C5-sugar monomers, or any combination thereof. A solute is added to the product mixture to cause partitioning of the product mixture into an aqueous layer containing the carbohydrates and a substantially immiscible organic layer containing the lactone.
Dumesic; James A. (Verona, WI), Luterbacher; Jeremy S. (Madison, WI)
Wisconsin Alumni Research Foundation (Madison, WI)
13/ 736,550
January 8, 2013
FEDERAL FUNDING STATEMENT This invention was made with government support under DE-FC02-07ER64494 awarded by the Department of Energy. The government has certain rights in the invention.