Paper making and fiber liberation – Processes of chemical liberation – recovery or purification... – Continuous chemical treatment or continuous charging or...
Patent
1974-08-26
1976-06-15
Bashore, Leon S.
Paper making and fiber liberation
Processes of chemical liberation, recovery or purification...
Continuous chemical treatment or continuous charging or...
162 38, 162 65, D21C 910
Patent
active
039635619
ABSTRACT:
A method for treating cooked fiber pulp as it comes from a continuous digester. The cooked pulp is bleached by intensively mixing the pulp with an oxygen containing gas and reacting the mixture while moving the mixed mass upwardly through a funnel shaped body within a pessurized reactor. The funnel shaped body is open at the upper end whereat the pulp mixture cascades over the side and flows downwardly into a ring chamber area between the reactor shell and funnel body, the pulp thereby forming a pressure barrier to any surplus gas within the reactor. The surplus unreacted gas is removed from the upper portion of the chamber for recycle with fresh pulp from the digestor and added gas. The treated pulp is removed from the lower portion of the ring chamber after passing downward therein.
REFERENCES:
patent: 1529919 (1925-03-01), Richter
patent: 1541371 (1925-06-01), Merrill
patent: 1576018 (1926-03-01), Wolf
patent: 3703435 (1972-11-01), Schleinkofer
patent: 3769152 (1973-10-01), Samuelson et al.
Bashore Leon S.
Corbin Arthur L.
Kamyr Aktiebolag
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