Paper making and fiber liberation – Processes of chemical liberation – recovery or purification... – With regeneration – reclamation – reuse – recycling or...
Patent
1991-10-18
1995-01-17
Jones, W. Gary
Paper making and fiber liberation
Processes of chemical liberation, recovery or purification...
With regeneration, reclamation, reuse, recycling or...
162 29, 162239, 422185, 423514, 423551, 423DIG3, D21C 1104
Patent
active
053823222
ABSTRACT:
A method for white liquor oxidation in a kraft mill utilizes a two-stage selective oxidation system in which the first stage is operated to remove sulfide while the second stage is operated to oxidize a significant fraction of the remaining oxidizable sulfur compounds to sulfate. The resulting selectively oxidized white liquor products are used as alkali sources for various process steps in the mill. Optionally, white liquor can be oxidized in a single stage to convert a significant fraction of the oxidizable sulfur compounds to sulfate. Methods for controlling the selective oxidation process are disclosed.
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Baczynska, J.; "Use of White and Green Liquors as Alkalis in the Oxygen Stage of Kraft Pulp"; Przeglad Papier35; No. 6; Jun. 1979; pp. 193-195.
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Ayala Varin
Cirucci John F.
Fox, Jr. Virgil G.
Magnotta Vincent L.
Naddeo Ronald C.
Air Products and Chemicals Inc.
Fernbacher John M.
Jones W. Gary
Marsh William F.
Nguyen Dean T.
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