Method of reutilizing kraft spent liquor

Details Method of reutilizing kraft spent liquor Method of reutilizing kraft spent liquor

1980-11-20

1982-06-15

Alvo, Steve

Paper making and fiber liberation

Processes of chemical liberation, recovery or purification...

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

162 33, 162 35, 162 36, 162 38, 210763, 210928, 423207, 423DIG3, D21C 1102, D21C 1104

Patent

active

043349560

ABSTRACT:
A method of utilizing kraft black liquor by converting the black liquor to "green liquor" and then oxidizing the green liquor with air in the presence of a quinone compound or spent liquor from the kraft process, the soda semi-chemical process or the neutral sulfite semi-chemical process as a catalyst. A marked improvement in the rate of oxidation is obtained. The thus oxidized green liquor is then able to be used as part at least of the digestion liquor in the NSSC process.

REFERENCES:
patent: 4053352 (1977-10-01), Hultman et al.
patent: 4073678 (1978-02-01), Hammond et al.
patent: 4098639 (1978-07-01), Noreus et al.

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