Abstract
The preparation of alkali metal chlorates by electrolysis of the corresponding chlorides has been studied by various authors [1]. However, reports of electrochemical methods for preparing alkaline earth metal chlorates are scarce, even though their salts have some specialty applications [2, 3]. In the case of the electrolysis of magnesium chloride, the precipitation of the magnesium hydroxide due to its low solubility is problematic, leading to a loss in current efficiency. Further, heavy deposits of magnesium hydroxide form on the cathode with consequently increased cell voltage. This difficulty has been obviated using a rotating stainless steel cathode which minimises hydroxide precipitation. A titanium coated metal oxide anode was used for the oxidation of magnesium chloride to magnesium chlorate. This paper presents results for the preparation of magnesium chlorate from magnesium chloride [4].
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