Process for production of magnesium chloride

Details Process for production of magnesium chloride Process for production of magnesium chloride

C - Chemistry, Metallurgy

01

F

23/175, 53/260

C01F 5/30 (2006.01) C22B 26/20 (2006.01)

Patent

CA 2018579

Process for production of magnesium chloride with sufficient purity for the production of magnesium metal, by leaching a magnesium containing raw material in hydrochloric acid. It is essential to keep the ratio between acid soluble iron and nickel greater than 120 and the ratio between acid soluble iron and phosphorus greater than 20 in the primary magnesium chloride solution, to obtain a sufficiently pure product. The acid soluble iron can partly or completely be substituted by an equal, molar amount of acid soluble aluminium. It is especially preferred to use mixtures of macro- and crypto- crystalline magnesites in the ratio 1:10 - 10:1 as raw mater- ial.

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