碘酸钾的电化学制法的研究

The Study on Preparation of Potassium Iodata by Electrochemistry Method

研究以碘和氢氧化钾为原料，应用电化学方法制备碘酸钾的最佳条件，并与氯酸钾氧化法对照。实验指出，电比学法优于氯酸钾氧化法。无隔膜的条件下，电解液的最佳配方为：碘200g／L，氢氧化钾85g／L，重铬酸钾2g／L。最佳操作条件为：阳极Pb—PbO2，阴极不锈钢电极，电流密度Dk=25A／dm2，温度50—60℃，电解时间6小时，在该条件下碘酸钾的产率89．7％，电流效率98％，产品纯度99．2％。

This paper investigated the preparation of potassium iodate by Electrochemical Method. The influence of electrode material,Current density, electrolyte temperature、pH on current efficiency and potassium iodate yield was studied. The optimum experimental conditions for the preparation of Potassium iodate are as follows:Anode Ph-PbO2Cathode Resistant SteelCurrent Density(A/dm2) 25pH 8. 5～9. 5Electrolyte temperature 50-60℃Current efficiency 98%Potassium iodate yield 89. 7%