FIELD: metallurgy.
SUBSTANCE: sodium fluoride is additionally added, and also in order to increase the purity and decrease the temperature, the electrolysis is carried out at the following component ratio, wt %: potassium chloride 15.60, sodium fluoride 7.84, sodium molybdate 1.00, boron oxide 1.00 up to 3.0, sodium chloride is the rest, at the temperature of 750°C and the voltage in the bath U=2.8 V.
EFFECT: use of the proposed method makes possible to increase the purity of the product, in particular to reduce the contamination of the target product with the other metals, and to reduce the process temperature.
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