Process for digesting cellulosic material with heat recovery

Details Process for digesting cellulosic material with heat recovery Process for digesting cellulosic material with heat recovery

1982-10-18

1986-03-25

Alvo, Steve

Paper making and fiber liberation

Processes of chemical liberation, recovery or purification...

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

162 47, D21C 1100

Patent

active

045781494

ABSTRACT:
A method for utilizing hot spent liquor, produced in a digester as the result of cooking a mass of cellulosic material with cooking liquor, is displaced from the top of the digester by pumping under pressure a displacing liquid into the base of the digester. The hot liquor so displaced is collected in an accumulator, and used to preheat another mass of cellulosic material as a preliminary to cooking of this other mass of material.

REFERENCES:
patent: 2195378 (1940-03-01), Dunbar
patent: 2671727 (1954-03-01), Westcott et al.
patent: 2882148 (1959-04-01), Rosenblad
patent: 3159527 (1964-12-01), Helland
patent: 4236961 (1980-12-01), Green

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