Process for the delignification and bleaching of chemical and se

Details Process for the delignification and bleaching of chemical and se Process for the delignification and bleaching of chemical and se

1982-07-21

1984-07-10

Alvo, Steve

Paper making and fiber liberation

Processes of chemical liberation, recovery or purification...

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

162 60, 162 65, 162 76, 162 78, 162 89, D21C 912, D21C 916

Patent

active

044591748

ABSTRACT:
A process for the delignification and bleaching of chemical and semi-chemical cellulosic pulps in which the pulp is subjected to a treatment with oxygen and a subsequent treatment with peroxide. The effluent from the treatment with peroxide is at least partially recycled to the treatment with oxygen.

REFERENCES:
patent: 3719552 (1973-03-01), Farley
patent: 4196043 (1980-04-01), Singh
patent: 4372812 (1983-02-01), Phillips et al.
"Pulping Processes", Rydholm, Interscience Publishing, N.Y., 1967, pp. 1118-1121.
Soteland, "Bleaching of Chemical Pulps with Oxygen and Ozone", Pulp and Paper Mag. of Canada, vol. 75, No. 4, pp. 91-96, (1974).

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