Abstract
Cerium group metals, namely, misch metal, lanthanum and cerium have been electrowon from their vacuum-dehydrated chlorides in fused sodium chloride-potassium chloride and lithium chloride-potassium chloride solvent. Temperature, cathode current density and composition of bath were optimised for high current efficiency and metal yield. In the case of lanthanum, current efficiency of 88% was achieved. The metals were free from inclusions and voids and analysed 99%+. The major non-rare earth metallic impurities were Fe, Mg and Al. The total gaseous impurities for lanthanum and misch metal were not more than 0·017%.
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Reference
Sohan Singh and Balachandra J 1973J. Electrochem. Soc. (India) 22 222
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Singh, S., Pappachan, A.L. Electrowinning of cerium group metals from fused chloride bath. Bull. Mater. Sci. 2, 155–159 (1980). https://doi.org/10.1007/BF02745402
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DOI: https://doi.org/10.1007/BF02745402