METHOD FOR SEPARATING AND RECOVERING RARE-EARTH ELEMENT

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A method for separating and recovering a plurality of rare-earth elements, wherein the method comprises : a step for introducing into a liquid a mixture of a rare-earth oxychloride and rare-earth oxychloride, the rare-earth oxychloride constituted from a rare-earth element of a different type from a rare-earth element constituting the rare-earth chloride, thereby yielding an insoluble substance containing the rare-earth oxychloride and a liquid in which the rare-earth chloride is dissolved; a step for recovering the rare-earth oxychloride from the insoluble substance; and a step for recovering the rare-earth chloride from the liquid in which the rare-earth chloride is dissolved.