Process for removing residual oxygen from oxygen-bleached pulp

Details Process for removing residual oxygen from oxygen-bleached pulp Process for removing residual oxygen from oxygen-bleached pulp

1978-10-23

1980-06-24

Bashore, S. Leon

Paper making and fiber liberation

Processes of chemical liberation, recovery or purification...

With regeneration, reclamation, reuse, recycling or...

162 57, 162 59, 55 52, 55204, D21C 910, D21C 1106

Patent

active

042093597

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 substantially radial flow to the slurry. If the residual oxygen is not removed, it may degas at an inopportune moment during later processing (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.

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