Paper making and fiber liberation – Processes of chemical liberation – recovery or purification... – With washing
Patent
1994-10-04
1997-01-07
Alvo, Steven
Paper making and fiber liberation
Processes of chemical liberation, recovery or purification...
With washing
162 65, 162 72, 162 78, 162 82, 162 83, 162 88, D21C 910
Patent
active
055913040
ABSTRACT:
A method and apparatus for treating wood pulp that includes incompletely washed brownstock, in which the brownstock is treated at a pH range of approximately 7.0 to 9.0 with a hemicellulase enzyme preparation that has a pH optimum below 6.0. Also, a method and apparatus for treating wood pulp containing incompletely washed brownstock in which the brownstock is treated at a pH range of approximately 6.0 to 9.0 with a hemicellulase enzyme preparation that has a pH optimum below 6.0 and that has a low cellulase content such that not more than about 10,000 FPU are added per ton of pulp.
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Foody Brian
Tolan Jeffrey
Alvo Steven
Von Kreisler Selting Werner
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