Method for extracting the chemical components from dissociated l

Details Method for extracting the chemical components from dissociated l Method for extracting the chemical components from dissociated l

1989-04-18

1990-03-13

Alvo, Steve

Paper making and fiber liberation

Processes of chemical liberation, recovery or purification...

Including recovery of organic by-product

162 21, 162 60, 162 77, 162 90, 530500, 530507, C07G 100, D21C 302, D21C 320, D21C 326

Patent

active

049080989

ABSTRACT:
The chemical components of lignocellulosic material that have been dissociated by a stream explosion process can be extracted from the mixture of components using a solvent extraction process. The dissociated lignocellulosic material is put in a column and the substances which are soluble in water, alcohol and caustic are leached out of the mixture by solvent extraction with relatively small volumes of those solvents. No agitation is used. Substantially pure cellulose remains in the column and it can be bleached before removal from the column.

REFERENCES:
patent: 4100016 (1978-07-01), Diebold et al.
patent: 4496426 (1985-01-01), Baumeister et al.
patent: 4511433 (1985-04-01), Tournier et al.
patent: 4520105 (1985-05-01), Sinner et al.
patent: 4645541 (1987-02-01), DeLong
Green et al.; "Alkaline Pulping in Aqueous Alcohols and Amines"; Tappi, May 1982, vol. 65, No. 5, p. 133.
April et al.; "Prehydrolysis Achieves Higher Organosolv Delignification"; Tappi, Feb. 1982, vol. 65, No. 2, p. 41.

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