Process for recovery of pulp mill chemicals

Details Process for recovery of pulp mill chemicals Process for recovery of pulp mill chemicals

1980-03-05

1981-11-10

Kratz, Peter F.

Paper making and fiber liberation

Processes of chemical liberation, recovery or purification...

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

55 73, 162 51, 423207, 423221, 423242, 423514, 423DIG3, D21C 1104, D21C 1108, D21C 1112

Patent

active

042996520

ABSTRACT:
A process is disclosed in which a waste gas containing sulfur compounds and carbon dioxide from pulp mill is contacted with an aqueous alkali solution derived from green liquor, white liquor or weak white liquor having low pH value and low sodium ion concentration and having been oxidized, whereby the sulfur compounds are absorbed as completely as possible with minimal absorption of carbon dioxide in the waste gas.

REFERENCES:
patent: 3183145 (1965-05-01), Collins
patent: 3471249 (1969-10-01), Markant et al.
patent: 3554859 (1971-01-01), Murray
patent: 3752875 (1973-08-01), O'Hern et al.
patent: 4053352 (1977-10-01), Hultman et al.
Oloman et al., "The Selective Absorption of Hydrogen Sulfide from Stack Gas", Pulp & Paper Magazine of Canada, Dec. 5, 1969, pp. 69-74.

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