Method of producing oxidized white liquor using dregs containing

Details Method of producing oxidized white liquor using dregs containing Method of producing oxidized white liquor using dregs containing

1997-01-17

1999-10-26

Nguyen, Dean T.

Paper making and fiber liberation

Processes of chemical liberation, recovery or purification...

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

162 29, 423551, 423564, 4235662, D21C 1104

Patent

active

059721650

ABSTRACT:
White liquor produced from black liquor is partially or completed oxidized. The white liquor contains dregs that are utilized as a carbon based catalyst. Dregs are produced by separating the dregs from green liquor an intermediate product between the black liquor and the oxidized white liquor. After formation of the oxidized white liquor, the dregs are separated therefrom to form a waste dreg stream which can be recycled so that part of the dregs present within the dregs containing white liquor stream to be oxidized is contributed by the waste dreg stream.

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Kenneth Y. Chen, "Environ. Sci. Technology 1972, 6, 529," Kinetics of Oxidation of Aqueous Sulfide by O2, (Jun. 10, 1972).
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