Paper making and fiber liberation – Processes of chemical liberation – recovery or purification... – Continuous chemical treatment or continuous charging or...
Reexamination Certificate
2006-09-11
2008-11-25
Halpern, Mark (Department: 1791)
Paper making and fiber liberation
Processes of chemical liberation, recovery or purification...
Continuous chemical treatment or continuous charging or...
C162S018000, C162S019000, C162S041000, C162S056000, C162S246000, C162S239000
Reexamination Certificate
active
07455749
ABSTRACT:
A method for adding cooking liquor into a vapor phase continuous digester for producing chemical cellulose pulp from cellulose chips including: introducing a slurry of the cellulose chips from a feed system to an inverted top separator in a top vapor phase section of the digester; distributing the slurry of the cellulose chips from the top separator into the vapor phase section of the digester; passing liquor through a conduit included with the drive shaft assembly of the top separator, and introducing the liquor from the conduit into the slurry as the slurry flows through the top separator or is distributed from the separator into the vapor phase section.
REFERENCES:
patent: 3532594 (1970-10-01), Richter
patent: 5413677 (1995-05-01), Collins
patent: 6024837 (2000-02-01), Laakso et al.
patent: 6174411 (2001-01-01), Laakso et al.
Bolles John F.
Greenwood Brian F.
Stromberg C. Bertil
Sullivan Patrick J.
Vogel Keith P.
Andritz Inc.
Halpern Mark
Nixon & Vanderhye P.C.
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