METHOD FOR ELECTROLYTIC PRODUCTION OF BISMUTH Russian patent published in 2021 - IPC C25C3/34 C25C1/22 C25C5/04 C25C7/00 

FIELD: non-ferrous metallurgy.
SUBSTANCE: invention relates to non-ferrous metallurgy, in particular to the production of bismuth by electrolytic method. The method involves the electrolytic separation of metals in a salt halide melt using a liquid metal cathode and an anode made of bismuth lead. Metal lead is used as a liquid metal cathode. Electrolytic separation is carried out using a porous ceramic diaphragm that provides the same interpolar distance between the electrodes, equal to 1.0 cm, the diaphragm is impregnated with a halide melt, as which an equimolar mixture of potassium and lead chlorides is used. The porous diaphragm prevents the mixing of the anode and cathode metals. The process is carried out at a cathode current density equal to the anode current density in the range from 0.5 to 1.5 A/cm², and a temperature of 480-530°C.

EFFECT: method allows one to reduce the specific energy consumption while maintaining the speed of the bismuth production process and the stable operation of the electrolytic cell in the technological mode.

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