Process for producing cellulose from lignin containing raw mater

Details Process for producing cellulose from lignin containing raw mater Process for producing cellulose from lignin containing raw mater

1991-12-31

1993-04-20

Alvo, Steve

Paper making and fiber liberation

Processes of chemical liberation, recovery or purification...

With testing, sampling or analyzing

162 62, 162 72, 435278, D21C 320, D21C 712

Patent

active

052039641

ABSTRACT:
A process and an apparatus capable of removing and/or transforming lignin or its degradation products present in material containing lignocellulose. In the present process, a redox potential is set between 200 and 500 mV by the addition to an acid aqueous solution, which contains lignitic raw materials, of oxidizing agents and/or reducing agents and/or salts and/or phenolic compounds. The lignin degrading reaction and its attendant simultaneous bleaching effect is initiated by the addition of enzymes, microorganisms, animal or plant cells. Continuous stirring allows the reaction to be maintained for several hours at a value that fluctuates about a constant redox potential value, and a constant temperature.

REFERENCES:
patent: 3041246 (1962-06-01), Bolaski et al.
patent: 4687741 (1987-08-01), Farrel et al.
ABIPC, No. 8566: Eriksson et al "Regulation of Lignin Degradation in Phanerochaete Chysosporium" Jun. 16-19, 1986.

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