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電化學法製備碘酸鉀的研究

Study of Electrochemical Method for the Preparation of Potassium Iodate

摘要


本文研究以碘和氫氧化鉀為原料,應用電化學方法製備碘酸鉀,並跟氯酸鉀氧化法對照。實驗指出,電化學法優于氯酸鉀氧化法,在無隔膜條件下,電解液的最佳配方為:碘(I_2 ) 200 g/L, KOH 85g g/L, K_2Cr_2O_7 2 g/L。最佳電解條件為:陽極材料Pb - Pb0_2,陰極為不鏽鋼電極,電流密度2 5A/dm^2,溫度50~60°C,電解時間6小時,在上述條件下,電解製備碘酸押的產率為89.7%,電流效率98%,產品純度99.2%。

關鍵字

碘酸鉀 電化學法 電解碘

並列摘要


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 Potas sium Iodate yield was studied. The optimum experimental conditions for the preparation of Potassium Iodate are as follows: Anode Pb-PbO_2 Cathode Resistant Steel Current density (A/dm^2) 25 pH 8.5-9.5 Electrolyto temperature 50-60 ℃ Current efficiency 98% Potassium Iodate yield 89.7%

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