スズ・インジウムのアマルガム電解精錬に関する研究(第2報)

スズアマルガムからのスズ電解精錬

抄録

The electrolyte compositions and operating conditions for the electrolytic refining of tin from tin amalgam have been investigated. The current efficiencies both of the electrolytic deamalgamation of the tin amalgam anode and of the clectradeposition of tin at the cathode were measured and the adherence of the tin deposit was examined. The following results were obtained.
1) SnCl₂; 0.1 mol/l, HCl; 0.25 N, and dodecylpyridinium chloride; 0.5g/l were the most suitable electrolyte composition. The cationic surfactant (dodecylpyridinium chloride) was added to get the adherent tin deposit. Anodic current density; 2.8 A/dm², cathodic current density; 2.4A/dm², and bath temperature; 60°C were the best operating condition. Under these electrolytic conditions, the anode and cathode efficiencies were approximately 100%, and the adhesion of the tin deposit was excellent.
2) Mercury and indium in the tin amalgam anode never dissolved into the electrolyte during the electrolysis.