Degassing of pulp

Details Degassing of pulp Degassing of pulp

D - Textiles, Paper

21

C

8/78.1

D21C 9/10 (2006.01) B01D 19/00 (2006.01) D21C 11/06 (2006.01) D21D 5/26 (2006.01)

Patent

CA 1120659

IP 2387 -1- ABSTRACT A method for removing residual oxygen from an aqueous slurry of pulp that has been oxygen-bleached is disclosed. The slurry, usually containing no more than 3 weight percent fiber, is agitated by a radial-flow impeller, which imparts a substan- tially radial flow to the slurry. If the residual oxygen is not removed, it may degas at an inopportune moment during later proces- sing (for example, washing) and carry some of the wood fibers to the surface of the slurry, thereby forming a foamy mat, which hinders further processing. -1-

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