NdとSmのカラム法による分離 : 含浸樹脂による希土類金属の分離に関する研究(第1報）

Separation of rare earths, especially Nd and Sm, was investigated by a batch and column method with solvent impregnated resin. The solvent impregnated resin was prepared by an impregnation of organo-phosphorous extractant whose trade name was PC-88A into a porous polymer resin.Though PC-88A is an effective extractant for rare earth separations, the adsorption behavior of rare earths with solvent impregnated resin in a batch method is the same as that with solvent extraction. In a column method to separate Nd and Sm, the effective separation in both adsorption and elution processes can be attained by setting suitable conditions, such as a bed hight, a flow rate and a concentration of eluant. Neodymium which is a lighter rare earth is separated from Sm at an adsorption step, while Sm which is a heavier rare earth is recoverd at an elution step. From the integration on breakthrough and elution curves, yield of Nd and Sm is calculated in the condition of 100% purity. The solvent impregnated resin can be repeatedly utilized at least 20 times from the results of life test of the resin