Paper making and fiber liberation – Processes of chemical liberation – recovery or purification... – Continuous chemical treatment or continuous charging or...
Patent
1997-10-29
2000-12-12
Chin, Peter
Paper making and fiber liberation
Processes of chemical liberation, recovery or purification...
Continuous chemical treatment or continuous charging or...
162 19, 162 29, 162 41, D21C 326
Patent
active
061593362
ABSTRACT:
This invention relates to a new and improved way of continuously cooking fiber material, wherein temperatures and alkaline levels are controlled to be maintained within specific levels in different zones of the digesting process in order to optimize chemical consumption and heat-economy, and, at the same time, achieving very good pulp properties.
REFERENCES:
patent: 4123318 (1978-10-01), Sherman
patent: 5053108 (1991-10-01), Richter
patent: 5080755 (1992-01-01), Backlund
patent: 5089086 (1992-02-01), Silander
patent: 5192396 (1993-03-01), Backlund
patent: 5346591 (1994-09-01), Henricson
patent: 5650045 (1997-07-01), Salminen
patent: 5779856 (1998-08-01), Kettunen
patent: 5824187 (1998-11-01), Richter et al.
Engstrom Johan
Gustavsson Soren
Lindgren Christofer
Lindstrom Mikael
Olsson Krister
Chin Peter
Fasth Rolf
Kvaerner Pulping AB
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