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Regioselective oxidation of C6 primary hydroxyls to carboxylate groups was applied to curdlan to prepare water-soluble oxidized products with less depolymerization by 4-acetamide-TEMPO/NaClO/NaClO 2 treatment in water at pH 4.7 and 35°C. Approximately 40–95% of the C6-OH groups of curdlan were converted to C6-carboxylate groups by the oxidation under the above conditions for 4–24h, and these...
Oxidation of bleached wood pulp by the TEMPO/NaClO/NaClO2 system was carried out at pH 3.5–6.8 and 25°–60°C with different amounts of NaClO, and investigated in terms of effects of the reaction conditions on carboxylate content and degree of polymerization (DP) of the oxidized pulp. Oxidation was accelerated by the addition of NaClO, when carried out at pH 6.8 and 40°–60°C. Addition of NaClO of more...
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