イオン交換樹脂の高温水中での分解

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  • Hydrothermal Decomposition of Ion-exchange Resins at Elevated Temperatures

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Strongly basic anion-exchange resins, Amberlite IRA-400 and IRA-900 of OH forms, were heated in water at 300° C for 3 hr. Trimethylamine and methanol were released and the number of moles of methanol was greater than the amount of increase in weak base exchange capacity. When strongly acidic cation-exchange resins, Amberlite IR-120 B and 200 C of H forms, were heated in water at 200° C, a stoichiometric relationship between the amount of decrease in exchange capacity and that of sulfate ions formed was observed. While, when these resins were heated at 300° C, exchange capacity decreased to zero, and most of sulfur which was originally present in the exchange groups remained in the residual resins.

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