Methods for digestion of cellulosic biomass solids in the presence of a phenolic solvent
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United States of America Patent
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May 17, 2016
Grant Date -
Sep 18, 2014
app pub date -
Mar 13, 2014
filing date -
Mar 14, 2013
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Abstract
Digestion of cellulosic biomass solids can be enhanced in the presence of a phenolic solvent. Methods for digesting cellulosic biomass solids can comprise providing cellulosic biomass solids in a digestion medium comprising a phenolic solvent; and heating the cellulosic biomass solids and the digestion medium in a digestion unit in the presence of molecular hydrogen and a slurry catalyst capable of activating molecular hydrogen, thereby forming an alcoholic component derived from the cellulosic biomass solids and liberating lignin from the cellulosic biomass solids into the digestion medium. The methods can further comprise converting at least a portion of the lignin into a phenolic solvent and returning the phenolic solvent formed from lignin to the cellulosic biomass solids.
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