Method for separating lignin from a lignin containing liquid/slurry
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United States of America Patent
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Aug 26, 2014
Grant Date -
Feb 28, 2008
app pub date -
Oct 3, 2005
filing date -
Oct 7, 2004
priority date (Note) -
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Abstract
A method for precipitating (separation) of lignin, using small amounts of acidifying agents, whereby a lignin product or an intermediate lignin product is obtained which can be used as fuel or chemical feed stock (or as a chemical or a raw material for further refining), from a lignin containing liquid/slurry, such as black liquor. A method for separation of lignin from a lignin containing liquid/slurry, such as black liquor, whereby a more pure lignin is obtained, a lignin product or an intermediate lignin product obtainable by the above methods, and use, preferably for the production of heat or for use as chemical, of the lignin product or intermediate lignin product are also disclosed.
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