Method for multistage bleaching and washing with recycle of disp

Details Method for multistage bleaching and washing with recycle of disp Method for multistage bleaching and washing with recycle of disp

1983-05-10

1985-07-16

Alvo, Steve

Paper making and fiber liberation

Processes of chemical liberation, recovery or purification...

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

162 40, 162 60, 162 89, D21C 318, D21C 902

Patent

active

045294798

ABSTRACT:
Method and apparatus for pulp bleaching at several bleaching stages by utilizing two or more different bleach chemicals. Bleach chemical (E) is in turn led to the pulp so that it displaces of pulp the chemical used at the preceding stage (C/D, D). Displacing chemical (E) is led to the pulp sheet when on the filtering area of a multi-stage drum washer (1, 2).

REFERENCES:
patent: 4104114 (1978-08-01), Rowlandson et al.

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