Persulfate/metal mixtures for repulping and decolorization

D - Textiles – Paper – 21 – C

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D21C 5/02 (2006.01)

Patent

CA 2197241

Repulping and/or decolorizing formulations and mixtures which include a catalytic amount of a salt of a metal such as copper, iron. silver, or nickel; a persulfate; and from 0-10 % saccharide. Formulations containing a carbonate, sesquicarbonate or bicarbonate for adjusting pH are preferred. A method for repulping and/or decolorizing broke, whether containing wet strength resin or not, using the formulations or mixtures of the ingredients in the formulations.

L'invention concerne des formulations et mélanges servant à la désintégration et/ou à la décoloration de vieux papiers, qui comprennent une quantité catalytique d'un sel d'un métal tel que du cuivre, du fer, de l'argent ou du nickel; un persulfate; et de 0 à 10 % de saccharide. Pour régler le pH, on préfère les formulations contenant un carbonate, un sesquicarbonate ou un bicarbonate. L'invention concerne un procédé de désintégration et/ou de décoloration des déchets de papier, que ceux-ci contiennent ou non une résine résistant à l'état humide, ledit procédé utilisant les formulations mentionnées ci-dessus ou des mélanges des ingrédients de ces formulations.

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