Paper making and fiber liberation – Processes of chemical liberation – recovery or purification... – Gas – vapor or mist contact
Patent
1984-12-03
1986-02-04
Alvo, Steve
Paper making and fiber liberation
Processes of chemical liberation, recovery or purification...
Gas, vapor or mist contact
162 78, 162 89, 162 90, D21C 914, D21C 9147, D21C 916
Patent
active
045684200
ABSTRACT:
A multi-stage process for the delignification and bleaching of lignocellulosic pulp is disclosed wherein the first alkaline extraction stage comprises extracting the pulp with caustic in the presence of oxygen and either a hypochlorite or a peroxide.
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Chan et al., "Modified Bleaching Sequences", Pulp & Paper Canada; 86:1 (1985) presented Montreal Jan. 31-Feb. 4, 1983.
Enz and Hallenback, "E.sub.o Provides Opportunity for Splitting Existing Bleach Plant", TAPPI Proceedings, 1983 Pulping Conference, pp. 309-313.
Larsen and Partridge, "Bleaching of Pulp, Chapter 5--Bleaching with Hypochlorites, Tappi Press, 1979, pp. 109-110.
Reeve, Tappi; 67(4), 143(1984).
Alvo Steve
Cinamon Jay S.
International Paper Company
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