Separation of lignin from hydrolyzate
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United States of America Patent
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Nov 19, 2013
Grant Date -
Jul 7, 2011
app pub date -
Jan 11, 2011
filing date -
Sep 21, 2007
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Abstract
A method for the production water insoluble reactive lignin having low sulfur content and lignosulfonates from lignocellulosic material in a batch or continuous process. Lignocellulosic material is fractionated to produce water insoluble native lignin and lignosulfonates in various ratios, while preserving the cellulose and hydrolyzed hemicelluloses using water, ethanol and sulfur dioxide.
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