Method of converting inorganic materials from kraft pulping liqu

Details Method of converting inorganic materials from kraft pulping liqu Method of converting inorganic materials from kraft pulping liqu

1989-09-11

1991-07-23

Alvo, Steve

Paper making and fiber liberation

Processes of chemical liberation, recovery or purification...

Including recovery of organic by-product

162 3011, 162 38, D21C 1100, D21C 1112

Patent

active

050340948

ABSTRACT:
A process for increasing the pulp producing capacity of a kraft mill including the steps of removing at least a portion of the lignin from kraft black liquor and separating the lignin from the aqueous phase. The next step is treating the aqueous phase to separate the inorganics and organics with the organics preferably being recycled to the process loop to be burned in the recovery furnace. The inorganics are converted into pulping chemicals which bypass the recovery furnace and are transported to white liquor preparation.

REFERENCES:
patent: 3986923 (1976-10-01), Reeve
patent: 4470876 (1984-09-01), Beaupre et al.
patent: 4507172 (1985-03-01), Steltenkamp

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