METHOD FOR ELECTROLYTIC REFINING OF CRUDE TELLURIUM Russian patent published in 2024 - IPC C25C5/02 C01B19/02 C22B61/00 C22B9/00 

FIELD: chemistry; metallurgy.

SUBSTANCE: electrolytic refining of crude tellurium involves dissolution of crude tellurium immersed in a solution of 100 g/dm³ caustic soda at a temperature of 90-99 °C at a ratio of L:T = 1.5-3, in the cathode chamber with an electric current with a density of 800-1200 A/m² for 2-5 hours for 94% extraction of tellurium into the solution, followed by filtration of the telluride solution and its treatment with compressed air in an aerator to obtain technical tellurium of grade T-1.

EFFECT: ability to increase recovery of tellurium to 94%, to prevent contamination of the product with aluminium, and also to ensure purification of crude tellurium from heavy non-ferrous metals.

1 cl, 2 dwg, 1 tbl