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US 7,001,483 B2Granted
Apparatus for making carboxylated pulp fibers
AssigneeWeyerhaeuser Company
InventorsDavid E. Severeid, Richard A. Jewell, Joseph L. Komen, S. Ananda Weerawarna, Bing Su
Life of this patent
Estimating the term…
Abstract
An apparatus for carboxylating wood pulp which utilizes the wood pulp bleach plant and the method of carboxylating the pulp which takes place in the bleach plant.
Claims20
A pulp carboxylation system comprising
- a pulp bleaching stage,
- a washer following said pulp bleaching stage,
- a first mixer following said washer,
- a supply of basic material connected to said system whereby said base material will be mixed by said first mixer,
- a second mixer following said first mixer,
- a supply of carboxylation chemicals connected to said system after said first mixer whereby said carboxylation chemicals will be mixed by said second mixer,
- a reaction chamber following said second mixer, said reaction chamber being sized for a reaction time of no more than 15 minutes,
- a third mixer following said reaction chamber,
- a supply of stabilizing material connected to said system after said reaction chamber whereby said stabilizing material will be mixed by said third mixer,
- a stabilizing chamber following said third mixer.
7 more elements
Dependencies are inferred from the claim text.