Process for the acid bleaching of cellulose pulp with peroxides

Details Process for the acid bleaching of cellulose pulp with peroxides Process for the acid bleaching of cellulose pulp with peroxides

1979-02-05

1980-09-16

Smith, William F.

Paper making and fiber liberation

Processes of chemical liberation, recovery or purification...

Treatment with particular chemical

162 78, 162 80, 162 89, D21C 916

Patent

active

042228190

ABSTRACT:
A process is provided for the acid bleaching of cellulose pulp with peroxides at a pH within the range from about -0.5 to about 3, followed immediately by aqueous alkaline extraction of the dissolvable lignin without intermediate washing.

REFERENCES:
patent: 2173474 (1939-09-01), Evoy
patent: 3251731 (1966-05-01), Gard
patent: 3652385 (1972-03-01), Noreus et al.
patent: 3865685 (1975-02-01), Hebbel et al.
patent: 3867246 (1975-02-01), Hebbel et al.
Bailey et al., Tappi, Jan. 1966, vol. 49, No. 1, pp. 9-15.

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