Processes for Purifying a Cellulosic Material
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United States of America Patent
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Issued Date -
Nov 6, 2014
app pub date -
May 2, 2014
filing date -
May 3, 2013
priority date (Note) -
Abandoned
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Abstract
A process for treating a cellulosic material comprising extracting the cellulosic material with an extractant to selectively extract hemicellulose therefrom and separating the extracted hemicellulose to form a cellulosic product comprising less hemicellulose than the cellulosic material. The extractant comprises a cellulose solvent and a co-solvent. The cellulosic product advantageously retains its cellulosic fiber morphology. The processes involve separating and recovering the hemicellulose and separating and recycling various process streams employed in the process.
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