Electrode Potentials of Antimony in the Mixture of Potassium and Lead Chlorides

Equilibrium potentials of antimony in the KCl–PbCl2–SbCl3 melt are measured by the EMF method as a function of the temperature and the content of antinomy chloride. Empirical equations of isotherms and polytherms of equilibrium potentials of antimony are obtained. The arbitrary standard potentials of antimony in the molten mixture of potassium and lead chlorides are calculated. The changes in the Gibbs energy at the formation of antimony trichloride from elements in the melt under study are calculated. The separation factors of metals from alloys are assessed. These results suggest that the processes of separation of lead and antimony in chloride melts hold much promise.