Paper making and fiber liberation – Processes of chemical liberation – recovery or purification... – With regeneration – reclamation – reuse – recycling or...
Patent
1993-07-07
1995-10-31
Alvo, Steve
Paper making and fiber liberation
Processes of chemical liberation, recovery or purification...
With regeneration, reclamation, reuse, recycling or...
162 65, 162 76, 162 78, 162 79, D21C 9147, D21C 9153, D21C 916, D21C 1100
Patent
active
054626412
ABSTRACT:
A process for bleaching pulp, in which, after fiber liberation, a first filtrate containing metals, principally in ionic form, is separated off from the pulp, and supplied downstream to the pulp flow after a bleaching stage.
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patent: 5145557 (1992-09-01), Peter et al.
patent: 5209641 (1993-05-01), Hoglund et al.
Emerging Technologies Today and in the Future, Copyright 1992, pp. 1-6.
1981 Oxidative Bleaching, Denver Hilton, Denvr, Co., Oct. 22, Copyright 1981, pp. 75-78.
Optimized Hydrogen Peroxide Bleaching In Closed White-Water Systems, Rolf Anderson, et al pp. 111-115.
Bleaching A Softwood Kraft Pulp Without Chlorine Compounds, N. Liebergott, et al. pp. 323-332.
Bergvist Anders
Dahllof Hakan
Alvo Steve
Kamyr Atkiebolag
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