Composition for alkaline peroxide bleaching of wood pulp using a

Details Composition for alkaline peroxide bleaching of wood pulp using a Composition for alkaline peroxide bleaching of wood pulp using a

1991-02-15

1992-09-08

Alvo, Steve

Paper making and fiber liberation

Processes of chemical liberation, recovery or purification...

Treatment with particular chemical

162 74, 162 76, 162 78, 162 80, 8111, 25218629, D21C 912, D21C 914

Patent

active

051455587

ABSTRACT:
A composition for alkaline hydrogen peroxide bleaching of mechanical wood pulp which employs a quaternary amine compound, such as (3-chloro-2-hydroxy-propyl) 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), King 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.
William G. Strunk, Pulp & Paper, "Factors Affecting Hydrogen Peroxide Bleaching for High-brightness TMP" by William G. Strunk, Jun. 1980, pp. 156-161.
`Hydrogen Peroxide Bleaching of Draft Pulp and the Role of Stabilization of Hydrogen Peroxide` by G. Papageorges, et al; given at ESPRA Meeting in Maastrict, Netherlands; May 1979.
G. W. Kutney, Pulp & Paper, "Hydrogen Peroxide: Stabilization of Bleaching Liquors", 1985, pp. T402-T409.

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