Removal of volatile organic components from spent sulfite efflue

Details Removal of volatile organic components from spent sulfite efflue Removal of volatile organic components from spent sulfite efflue

1975-03-17

1979-05-22

Bashore, S. Leon

Paper making and fiber liberation

Processes of chemical liberation, recovery or purification...

Including recovery of organic by-product

162 36, 159 47WL, D21C 1102, D21C 1110

Patent

active

041558049

ABSTRACT:
Volatile organic components are removed from the effluent liquor of an acid sulfite digestion process by concentrating the effluent liquor in multiple stages to form an organic-rich aqueous fraction, an organic-lean aqueous fraction and a high solids content fraction, continuously withdrawing the organic-lean and high solids content fraction from the recovery process, continuously recycling the organic-rich fraction to the digestion step to form a closed loop which acts to build up the concentration of volatile organic components, and continuously separating and withdrawing from the closed loop the bulk of the volatile organic components in a stream more concentrated than that of the closed loop.

REFERENCES:
patent: 1838109 (1931-12-01), Richter
patent: 2801206 (1957-07-01), Goddard
patent: 3085038 (1963-04-01), Rovesti
patent: 3462343 (1969-08-01), Phillips
patent: 3764462 (1973-10-01), Baierl
Rydholm, S. A., "Pulping Processes", Interscience Publishers, NY, NY, p. 497, (1965).
Casey, J. P., "Pulp & Paper", Sec. Ed., vol. I, Interscience Pub., NY, NY, pp. 158-162, (1960).
ABIPC, vol. 41 #10, 4-71, Abstract #9613, effective date 11-15-70.

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