Ion flotation of rare-earth metals with sodium dodecyl sulfate and the effect of chloride ions on this process were studied. Values of the distribution coefficients were obtained. Rare-earth metals (REMs) and their compounds become increasingly important for modern technology. Large amounts of REMs are used in the form of a mixture of oxides in metallurgical, glass-making, and ceramic industries. Cerium, neodymium, samarium, europium, and gadolinium are most widely used as compounds of individual REMs. Cerium oxide is applied in glass and mirror polishing. The misch metal containing 50 cerium, 30 lanthanum, 15 neodymium, and 5 praseodymium has found wide use. This alloy serves to purify steel by removal of free oxygen and sulfur and admixtures of lead and antimony.
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