Lignin Precipitation Methods

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United States of America Patent

APP PUB NO 20140187760A1
SERIAL NO

13730218

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Abstract

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A method of separating lignin from black liquor from a pulp mill by adjusting the pH of the black liquor is provided. Various additional steps can be used to further process the separated lignin, including washing, drying, and/or comminuting. In certain embodiments, solvents and byproducts are recycled so as to reduce waste and maintain chemical balance within a commercial lignin production facility.

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Patent Owner(s)

Patent OwnerAddress
WEYERHAEUSER NR COMPANYPO BOX 9777 CH1J27 FEDERAL WAY WA 98063-9777

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Pu, Qiusheng Auburn, US 2 8

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