METHODS FOR SEPARATING AND REFINING LIGNIN FROM BLACK LIQUOR AND COMPOSITIONS THEREOF

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United States of America Patent

APP PUB NO 20170130398A1
SERIAL NO

15319935

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Abstract

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The invention relates methods and processes for the separation and refining of lignin from spent cooking liquor, called black liquor, present in industrial chemical plants, and compositions thereof. A process is provided for separating black liquor into at least two, three, or four streams selected from: (i) a gaseous stream comprising volatile sulfur compounds; (ii) a lignin-comprising stream produced by extracting lignin into a limited solubility solvent S1; (iii) a salt stream, comprising solid sodium and sulfate salts; and (iv) a salt-depleted and lignin-depleted aqueous stream comprising hydrocarbons.

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Patent Owner(s)

Patent OwnerAddress
VIRDIA INC1319 HWY 182 RACELAND LA 70394

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
JANSEN, Robert Collinsville, US 77 398
LAPIDOT, Noa Mevaseret Zion, US 31 507
LAWSON, James Alan Ellsworth, US 14 31

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