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Biomass pre-treatment for co-production of high-concentration C5- and C6-carbohydrates and their derivatives

United States Patent

June 7, 2016
View the Complete Patent at the US Patent & Trademark Office
Described is a method of processing biomass to separate it into a liquid fraction enriched in solubilized C5-sugar-containing oligomers and C-5 sugar monomers and a solid fraction enriched in substantially insoluble cellulose and C6-sugar-containing oligomers. The method includes the steps of reacting biomass with a solvent system comprising water, at least one lactone, or at least one furan, or at least one cyclic ether, and at least one acid, for a time and at a temperature to yield the liquid and solid fractions. The liquid and solid fractions may then be separated. Gamma-valeroloactone is a preferred lactone for use in the solvent system. Tetrahydrofuran is a preferred furan species for use in the solvent system.
Dumesic; James A. (Verona, WI), Martin Alonso; David (Madison, WI), Luterbacher; Jeremy Scott (Madison, WI)
Wisconsin Alumni Research Foundation (Madison, WI), Glucan Biorenewables LLC (St. Louis, MO)
14/ 136,564
December 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.