Mechanically freeing wood fibers in the presence of spent peroxi

Details Mechanically freeing wood fibers in the presence of spent peroxi Mechanically freeing wood fibers in the presence of spent peroxi

1976-05-28

1977-06-14

Corbin, Arthur L.

Paper making and fiber liberation

Processes of chemical liberation, recovery or purification...

Chemical treatment after start or completion of mechanical...

8111, 162 26, 162 37, 162 40, 162 71, 162 78, 241 15, 241 28, D21B 116, D21C 916

Patent

active

040295435

ABSTRACT:
A process for the preparation of a cellulose pulp by mechanically freeing wood fibers in a grinder to form a fibrous pulp and bleaching the fibrous pulp with a peroxide-containing bleaching agent, as the only bleaching agent, in a peroxide bleaching stage, the mechanical freeing of the fibers being carried out in the presence of a spent liquor from the peroxide bleaching stage have a pH of 7 to 9.

REFERENCES:
patent: 2413583 (1946-12-01), Shearer
patent: 2453566 (1948-02-01), Adams et al.
patent: 3423283 (1969-01-01), Goodwald et al.
patent: 3694309 (1972-09-01), Gierer et al.

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