Paper making and fiber liberation – Processes of chemical liberation – recovery or purification... – Continuous chemical treatment or continuous charging or...
Patent
1994-03-08
1999-11-23
Alvo, Steven
Paper making and fiber liberation
Processes of chemical liberation, recovery or purification...
Continuous chemical treatment or continuous charging or...
162 57, 162 65, D21C 9153
Patent
active
059893885
ABSTRACT:
A two stage ozone-pulp bleaching method and apparatus are disclosed. In the first stage, high consistency pulp particles are turbulently mixed and contacted with a gaseous mixture containing ozone to mix and contact substantially all of the pulp particles with ozone to react at least a portion of the pulp particles with the ozone. Pulp particles and gaseous bleaching mixture are then directed to a second stage including a quiescent pulp bed. Pulp particles may complete their reaction in the bed, which also serves to strip ozone which was not contacted with pulp particles in the first stage from the gaseous bleaching mixture.
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ASAM Pilot Plant Confirms Laboratory Test Results, by Kraftanlagen Heidelberg, "The Right Approach to Pollution-free Pulping".
Friend William H.
Pikulin Michael A.
Alvo Steven
Union Camp Patent Holding, Inc.
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