Paper making and fiber liberation – Processes of chemical liberation – recovery or purification... – With regeneration – reclamation – reuse – recycling or...
Reexamination Certificate
2006-03-07
2009-10-20
Hug, Eric (Department: 1791)
Paper making and fiber liberation
Processes of chemical liberation, recovery or purification...
With regeneration, reclamation, reuse, recycling or...
C162S017000, C162S029000, C162S030110, C162S043000, C162S237000
Reexamination Certificate
active
07604711
ABSTRACT:
Method and apparatus for batch displacement digester systems to increase tank farm vessel temperatures for more efficient delignification rates by mitigating the formation of flow channels in the chip bed, minimizing the vertical temperature gradient in the digester and segregation of returning liquors to the tank farm from the digester.
REFERENCES:
patent: 2996422 (1961-08-01), Durant et al.
patent: 2003/0111200 (2003-06-01), Prough et al.
patent: WO 2002036876 (2002-05-01), None
patent: WO 2004005609 (2004-01-01), None
Sezgi et al., A combined discret-continuous simulation of an RDH tank farm,1994,TAPPI Journal, Vol. 77, No. 7.
Calandra Anthony J
Design IP
Hug Eric
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