Continuous countercurrent pretreatment of lignocellulose with an

Details Continuous countercurrent pretreatment of lignocellulose with an Continuous countercurrent pretreatment of lignocellulose with an

1980-11-10

1982-01-12

Alvo, Mark S.

Paper making and fiber liberation

Processes of chemical liberation, recovery or purification...

With regeneration, reclamation, reuse, recycling or...

162 40, 162 72, 162 90, D21C 302, D21C 320, D21C 1100

Patent

active

043103839

ABSTRACT:
Lignocellulose is treated with an alkaline pretreatment liquor containing anthraquinone or other pretreatment agent in a continuous process in which the lignocellulose and pretreatment liquor flow countercurrently. The pretreatment agent is substantially soluble in the pretreatment liquor introduced into the pretreatment zone and is substantially insoluble in the pretreatment liquor withdrawn from the pretreatment zone, with the result that the pretreatment agent is effectively recycled within the pretreatment zone.

REFERENCES:
patent: 4012280 (1977-03-01), Holton
patent: 4127439 (1978-11-01), Fujii et al.
patent: 4178861 (1979-12-01), Van der Hoek

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