Paper making and fiber liberation – Processes of chemical liberation – recovery or purification... – Gas – vapor or mist contact
Reexamination Certificate
2006-07-04
2006-07-04
Hug, Eric (Department: 1731)
Paper making and fiber liberation
Processes of chemical liberation, recovery or purification...
Gas, vapor or mist contact
C162S009000, C162S058000, C162S181400, C162S185000
Reexamination Certificate
active
07070677
ABSTRACT:
The present invention relates to a method of and apparatus for treating pulp with filler. The method and apparatus according to the invention are especially well suitable for treating pulp with filler, the mixing of which to the pulp requires simultaneous treatment of the pulp with gas. The treatment of cellulose pulp suspension of the paper making industry and calcium hydroxide with carbon dioxide is presented as one preferred embodiment of the invention.
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Perry's Chemical Engineers' Handbook (7th Edition), pp. 12-25 to 12-26, 12-52 to 12-54, 12-64 to 12-65 (1997).
Alvo Steve
Andritz OY
Hug Eric
Nixon & Vanderhye P.C.
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