Method for digesting a biomass comprising lignin together with cellulose and/or hemicellulose
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United States of America Patent
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Nov 25, 2014
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app pub date -
Oct 16, 2009
filing date -
Oct 17, 2008
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Abstract
The invention relates to a method for digesting a biomass comprising, lignin, cellulose, and hemicellulose, comprising the steps of: (a) contacting the biomass with a first solvent for dissolving the cellulose and/or the hemicellulose, (b) contacting the dissolved cellulose and/or hemicellulose with a precipitant for forming a precipitate comprising cellulose and/or hemicellulose and residual lignin, wherein the precipitant is selected from the group consisting of alkanes, ethers, and esters; and (c) contacting the precipitate with a second solvent for removing residual lignin from the precipitate. The invention further relates to an apparatus for performing such a method.
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