Lead -

Alternatively to the pyrometallurgical processes, very pure can be obtained by processing smelted electrolytically using the Betts process. Anodes of impure and cathodes of pure are placed in an electrolyte of fluorosilicate PbSiF 6. Once electrical potential is applied, impure at the anode dissolves and plates onto the cathode, leaving the majority of the impurities in solution.

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