Paper making and fiber liberation – Processes of chemical liberation – recovery or purification... – With regeneration – reclamation – reuse – recycling or...
Patent
1994-04-19
1996-12-10
Czaja, Donald E.
Paper making and fiber liberation
Processes of chemical liberation, recovery or purification...
With regeneration, reclamation, reuse, recycling or...
162 35, 162 43, 162 82, 162 90, 423DIG3, 423428, 423642, D21C 1100
Patent
active
055826830
ABSTRACT:
A method for the recovery of chemical values from spent lignocellulosic pulping liquor salts to produce white liquor of different sulfidities. Preferably, the white liquor is in the form of separate liquid streams, each of which is of a sulfidity that is different from the sulfidity of others of the streams. The method also provides for developing a white liquor stream which is essentially free of sulfide values, but which contains sodium hydroxide. Further, the method provides for recovery of titanium values for recycling.
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Bonsu Alexander K.
Matthew M. C.
Thorman Raymond P.
Czaja Donald E.
International Paper Company
Padgett Calvin
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