Process and apparatus for recovery of spent pulping liquors

Details Process and apparatus for recovery of spent pulping liquors Process and apparatus for recovery of spent pulping liquors

1980-04-14

1981-12-01

Smith, William F.

Paper making and fiber liberation

Processes of chemical liberation, recovery or purification...

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

162 36, 162 47, 162 30K, 422142, 422144, 422147, 422185, 423DIG3, D21C 1112

Patent

active

043034691

ABSTRACT:
An integrated system, process and apparatus are provided for the efficient and effective recovery of spent pulping liquors, particularly kraft black liquor, whereby in an initial stage concentrated spent liquor is subjected to combustion in a reactor equipped with a plurality of particulate materials, at least one of which is of finer particle size than the other, preferably subjecting a portion of said particulate materials to at least one further treatment in a fluidized bed unit, and treating the inorganic solid combustion products in a reducing atmosphere.

REFERENCES:
patent: 2291833 (1942-08-01), Savell
patent: 3322492 (1967-05-01), Flood
patent: 3574051 (1971-04-01), Shah
patent: 3674630 (1972-07-01), Copeland
patent: 3761568 (1973-09-01), Brink et al.
patent: 4084545 (1978-04-01), Nack et al.

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