Process for bleaching a mechanical pulp with hydrogen peroxide

Details Process for bleaching a mechanical pulp with hydrogen peroxide Process for bleaching a mechanical pulp with hydrogen peroxide

1987-04-16

1988-07-12

Lacey, David L.

Paper making and fiber liberation

Processes of chemical liberation, recovery or purification...

Chemical treatment after start or completion of mechanical...

162 65, 162 71, 162 78, D21C 912, D21C 916

Patent

active

047567988

ABSTRACT:
Mechanical pulp is bleached by a treatment with hydrogen peroxide wherein prior to or simultaneously with said treatment the mechanical pulp is subject to an oxygen pressure.

REFERENCES:
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patent: 4372812 (1983-02-01), Phillips et al.
patent: 4410397 (1983-10-01), Kempf
patent: 4459174 (1984-07-01), Papageorges et al.
patent: 4568420 (1986-02-01), Nonni
patent: 4626319 (1986-12-01), Kruger et al.
Beeman et al., "Properties of Sodium Peroxide Bleached Mechanical Pulp and Its Applications in Paper Manufacture", Tappi Section, 6/15/44, pp. 33-36.
Andrews and Singh, The Bleaching of Pulp, Tappi, 3rd ed., pp. 214-220.
Sjostrom, Wood Chemistry Fundamentals and Applications, Academic Press, pp. 146-168 (1981).
Gierer, Chemical Aspects of Delignification, pp. II:12-II:17.
Gellerstedt; Chemical Aspects of Hydrogen Peroxide Bleaching, pp. II:120-II:124.

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