Method for fractionating lignin
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United States of America Patent
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Feb 20, 2018
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N/A
app pub date -
Jun 5, 2013
filing date -
Jun 6, 2012
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Abstract
The present invention relates to a method for fractionating lignin, wherein the method comprises the following steps: (i) dissolving lignin into a mixture containing organic solvent and water; and (ii) ultrafiltrating the mixture formed in step (i) through one or more filtration membranes for producing a predetermined number of lignin fractions, wherein each fraction contains lignin with a molecular weight within a predetermined range. The present invention further relates to a lignin fraction and to the uses thereof.
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