Three vessel treatment system

D - Textiles – Paper – 21 – C

Patent

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D21C 7/10 (2006.01) D21C 3/24 (2006.01) D21C 9/02 (2006.01)

Patent

CA 1069363

ABSTRACT OF THE DISCLOSURE 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 re- duction 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 Digesting liquid withdrawn from the digesting vessel is heated in a transfer line back to the impregnation vessel.

280981

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