Decolorization of waste paper

Details Decolorization of waste paper Decolorization of waste paper

D - Textiles, Paper

21

C

D21C 9/10 (2006.01) D21C 5/02 (2006.01) D21C 9/16 (2006.01)

Patent

CA 2128804

ABSTRACT A method for brightening fiber from colored waste paper comprising bleaching pulp from colored waste paper with sodium hydrosulfite, formamidine sulfinic acid, or hydrogen peroxide in the presence of a selected quaternary compound.

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