Paper making and fiber liberation – Processes of chemical liberation – recovery or purification... – Gas – vapor or mist contact
Patent
1995-11-17
1998-06-23
Alvo, Steven
Paper making and fiber liberation
Processes of chemical liberation, recovery or purification...
Gas, vapor or mist contact
162 76, 162 78, 162 89, 162 90, D21C 914, D21C 9147, D21C 9153, D21C 916
Patent
active
057700117
ABSTRACT:
An elementally chlorine-free method for the delignification and bleaching of pulp which involves the use of a neutral monoperoxysulfate bleaching step to delignify and thus brighten the pulp. The process achieves good selectivities above about 3 even at high delignification degrees of 60% or greater.
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Lachenal, "The Potential of H202 as delignifying amd bleaching agent", 1992 Pacific Pulps and Paper Conf. Proceedinfgs; Sep. 8-10 1992.
"Bleaching Groundwood and Kraft Pulps with Potassium Peroxymonosulfate--Comparison with Hydrogen Peroxide"--Edward L. Springer and James D. McSweeny Published: 1986 Publishing Conference--pp. 671-681--TAPPI Proceedings.
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Bhattacharjee Shyam S.
Lam Jamshed N.
Yasnovsky Vacheslav M.
Alvo Steven
International Paper Company
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