Isolation of lignin from solvent pulping liquors

Details Isolation of lignin from solvent pulping liquors Isolation of lignin from solvent pulping liquors

C - Chemistry, Metallurgy

07

G

260/133

C07G 1/00 (2006.01)

Patent

CA 2026585

ISOLATION OF LIGNIN FROM SOLVENT PULPING LIQUORS Abstract of the Disclosure Adjusting the pH of a solvent pulping liquor to a pH of greater than 3.0 but less than or equal to 7.0 results in the formation of an easily filterable lignin precipitate when a portion of the lower alcohol is evaporated from the solvent pulping liquor. The lower alcohol may be evaporated by direct contact heating in a stirred tank without the formation of a tarry precipitate.

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