Paper making and fiber liberation – Processes of chemical liberation – recovery or purification... – Continuous chemical treatment or continuous charging or...
Patent
1976-06-29
1978-10-31
Bashore, S. Leon
Paper making and fiber liberation
Processes of chemical liberation, recovery or purification...
Continuous chemical treatment or continuous charging or...
162 42, 162 45, 162 60, 162237, 162242, 162249, D21C 710
Patent
active
041233182
ABSTRACT:
An apparatus and method for the treatment of cellulosic fiber material with maximum efficiency while minimizing capital costs. Fiber material entrained in digesting liquid is impregnated with the liquid in an impregnation vessel, sluiced to a separate digesting vessel, and from the digesting vessel sluiced to one or more separate washing vessels without a significant reduction in pressure. Countercurrent washing is effected in the washing vessel(s). Digesting liquid withdrawn from the digesting vessel is heated in a transfer line back to the impregnation vessel.
REFERENCES:
patent: 2789051 (1957-04-01), Obenshain
patent: 3130119 (1964-04-01), Carlsmith
patent: 3237773 (1966-03-01), Laakso
patent: 3578554 (1971-05-01), Richter
patent: 4002528 (1977-01-01), Laakso
Bashore S. Leon
Kamyr Inc.
Smith William F.
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