The influence of transition metal ions on the oxidation of kraft pulp using hydrogen peroxide under mildly acidic conditions

Abstract Oxidation of kraft pulp using hydrogen peroxide under mild acidic conditions can be applied in order to obtain new functionality the fibres, form carbonyl groups. The concentration must, however, higher than consumed by oxidation reactions meaning that liquid must recirculated fully utilize peroxide. This paper investigates consequences recirculation liquor. It was found results an accumulation ions transition metals (copper, iron and manganese) metal are known for catalytic decomposition peroxide, producing radicals which may react with carbohydrates, forming groups as well causing carbohydrate degradation. confirmed through liquor controlled addition metals. At high ion were fast a severe degradation carbohydrates observed, accompanied rapid consumption. consequence this, industrial context, is carefully add cellulose without excessive or consumption