TAED Activator for Peroxide Bleaching of Recycled Pulp, 2007 TAPPI 8th Research Forum on Recycling

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The aim of this research is to investigate the effects of pH, TAED charge, chelating agent-DTPA usage and reaction time of peroxide bleaching on the physical properties of recycled pulp. The results showed (a) Reaction time, pH and TAED charge had significant effects on the brightness; especially reaction time at low alkaline pH levels and low chemical charges; and the addition of DTPA increased tensile 10% and improved brightness stability; (b) for current mill process for bleaching recycled pulp-Q(TBY), compared to peroxide, TAED increased bulk (20%), reduction reaction time (50%), and reversion decreased; and lowered some of chemicals usage.