Two-stage peroxide bleaching process

Details Two-stage peroxide bleaching process Two-stage peroxide bleaching process

D - Textiles, Paper

21

C

D21C 9/16 (2006.01) D21C 9/10 (2006.01)

Patent

CA 2045754

ICICAN 771 ABSTRACT Two-Stage Peroxide Bleaching Process A continuous two-stage peroxide bleaching process operated in a single bleach plant for producing a bleached pulp of high brightness, having a second stage bleaching step using a high charge of peroxide followed by a washing stage to recover the residual liquor containing a substantial amount of the applied peroxide. The residual liquor is recycled and used for bleaching in the first stage. Only a portion of the pulp bleached in the first stage is treated in the second stage. Two or more bleached pulp products can be produced simultaneously.

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