Method of separating lignocellulosic material into lignin, cellu

Details Method of separating lignocellulosic material into lignin, cellu Method of separating lignocellulosic material into lignin, cellu

1994-12-02

1998-03-24

Alvo, Steven

Paper making and fiber liberation

Processes of chemical liberation, recovery or purification...

Including recovery of organic by-product

162 72, 162 77, 127 37, D21C 320

Patent

active

057308373

ABSTRACT:
A method for separating lignocellulosic material into (a) lignin, (b) cellulose, and (c) hemicellulose and dissolved sugars. Wood or herbaceous biomass is digested at elevated temperature in a single-phase mixture of alcohol, water and a water-immiscible organic solvent (e.g., a ketone). After digestion, the amount of water or organic solvent is adjusted so that there is phase separation. The lignin is present in the organic solvent, the cellulose is present in a solid pulp phase, and the aqueous phase includes hemicellulose and any dissolved sugars.

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patent: 4520105 (1985-05-01), Sinner
patent: 4594130 (1986-06-01), Chang

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