Process for bleaching preoxidized paper pulp

Details Process for bleaching preoxidized paper pulp Process for bleaching preoxidized paper pulp

1979-07-19

1981-06-23

Chin, Peter

Paper making and fiber liberation

Processes of chemical liberation, recovery or purification...

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

162 60, 162 65, 162 66, 162 67, 162 72, 162 78, 162 88, 162 89, D21C 912

Patent

active

042749123

ABSTRACT:
The invention relates to a process for bleaching preoxidized paper pulp enabling a pulp having a very high degree of whiteness to be obtained with a limited number of treatment steps and enabling pollution to be reduced without degrading the qualities of the pulp; such a process essentially comprises the combination of the three successive treatment steps, namely:

REFERENCES:
patent: 2478379 (1949-08-01), Dodson
patent: 3884752 (1975-05-01), Campbell et al.
patent: 4039372 (1977-08-01), Reeve et al.
patent: 4093506 (1978-06-01), Richter
Aldrich, Cellulose Degradation Inhibitors for the Chlorination Stage, Tappi, vol. 51, No. 3, (Mar. 1968), pp. 71-74.

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