Persulfate mixtures for repulping wet strength paper

Details Persulfate mixtures for repulping wet strength paper Persulfate mixtures for repulping wet strength paper

1997-11-17

1999-10-26

Gibson, Sharon

Paper making and fiber liberation

Processes of chemical liberation, recovery or purification...

Waste paper or textile waste

2521861, 210750, 210758, D21C 502, A01N 300, B01D 1706, C02F 172

Patent

active

059721642

ABSTRACT:
A method for repulping a wet strength paper is disclosed. Wet strength paper, which contains a wet strength resin, is agitated in water to form an aqueous slurry. An effective amount of a composition that contains a dry mixture of a persulfate and a base in the range of 90:10 to 10:90 is added either before or during agitation, and the slurry heated to produce pulp product for paper manufacture. The persulfate/base combination is capable of breaking down the wet strength resin and adjusting or maintaining the pH at a predetermined level without additional chemical treatment.

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