Paper making and fiber liberation – Processes of chemical liberation – recovery or purification... – Continuous chemical treatment or continuous charging or...
Patent
1976-02-24
1976-08-24
Bashore, S. Leon
Paper making and fiber liberation
Processes of chemical liberation, recovery or purification...
Continuous chemical treatment or continuous charging or...
8107, 8108R, 8108A, 68181R, 162 87, D21C 910
Patent
active
039765385
ABSTRACT:
A first portion of bleaching liquid is passed through cellulosic pulp in a bleaching zone at a first level with respect to the pulp feed direction and withdrawn through transversely spaced strainer means located at about said first level so that the passage of the first portion of bleaching liquid through the pulp is in a direction transverse to the feed direction of the pulp and a second portion of bleaching liquid is passed through said cellulosic pulp at a second level with respect to the pulp feed direction and withdrawn through transversely spaced strainer means located at about the second level so that the passage of the second portion of bleaching liquid through the pulp is in a direction transverse to the feed direction of the pulp and opposite from the transverse direction through said first level.
REFERENCES:
patent: 2307137 (1943-01-01), Kennedy
patent: 3348390 (1967-10-01), Richter
patent: 3524551 (1970-08-01), Richter
patent: 3575795 (1971-04-01), Brinkley et al.
patent: 3599449 (1971-08-01), Richter
Ekholm Rolf G.
Gullichsen Johan E.
Bashore S. Leon
Corbin Arthur L.
Kamyr Aktiebolag
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