Bleaching of cellulosic pulps using hydrogen peroxide

Details Bleaching of cellulosic pulps using hydrogen peroxide Bleaching of cellulosic pulps using hydrogen peroxide

D - Textiles, Paper

21

C

8/82

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

Patent

CA 1284558

A process is described herein for the bleaching of wood pulp which is improved by the combination of a pretreatment of the pulp with a polyaminocarboxylic acid, e.g. ethylenediaminetetraacetic acld, prior to bleaching with an alkaline aqueous peroxide solution containing a stabilizing amount of an aminophosphonic acid derivative together with a polymer of an unsaturated carboxylic acid or amide or an alkylsulfonic acid substituted amide.

546753

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