Process for alkaline peroxide bleaching of wood pulp using a qua

Details Process for alkaline peroxide bleaching of wood pulp using a qua Process for alkaline peroxide bleaching of wood pulp using a qua

1989-11-15

1991-05-07

Alvo, Steve

Paper making and fiber liberation

Processes of chemical liberation, recovery or purification...

Treatment with particular chemical

162 76, 162 78, 162 80, 162 87, 8111, D21C 912, D21C 916

Patent

active

050134043

ABSTRACT:
A process for alkaline hydrogen peroxide bleaching of mechanical wood pulp which employs a quaternary amine compound, such as (3-chloro-2-hydroxypropyl)trimethyl ammonium chloride, in the stabilized bleach solution. The brightness of the final paper product made from such bleached pulp shows marked improvement over that in which only chelating agents are employed to improve the brightness according to the known art. The process is useful in both silicate and silicate-free bleach solutions.

REFERENCES:
patent: 3860391 (1975-01-01), Kling et al.
patent: 3996151 (1976-12-01), Kirner
patent: 4238282 (1980-12-01), Hyde
patent: 4239643 (1980-12-01), Kowalski
patent: 4614646 (1986-09-01), Christiansen
patent: 4732650 (1988-03-01), Michalowski et al.
Kutney, "Hydrogen Peroxide: Stabilization of Bleaching Liquors", Pulp & Paper Canada, 86:12(1985), 162-78.
Pulp & Paper, "Factors Affecting Hydrogen Peroxide Bleaching for High-brightness TMP" by William G. Strunk, Jun. 1980, pp. 156-161.
"Hydrogen Peroxide Bleaching of Kraft Pulp and the Role of Stabilization of Hydrogen Peroxide" by G. Papageorges, et al., given at ESPRA Meeting in Maastricht, Netherlands, May 1979.

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