Separation of rare-earth elements and separation device

文件类型：PDF文档
文件大小：255K
The invention provides a method of separating rare earth elements from a composite mixed with a plurality of rare earth elements with high a high separation rate and convenience, and a separating device executing the method. The method includes the steps of : a first heat treatment step, in which a plurality of rare earth chlorides are generated from an original composite including a plurality of rare earth oxides and ammonium chlorides; a second heat treatment step, in which a chloride/ oxychloride mixture including a rare earth chloride of a first set of rare earth elements and a rare earth chloride oxide of a second set of rare earth elements from a plurality from a plurality of rare earth chlorides; a selective extraction process, in which the chloride/ oxychloride mixture is thrown into a solvent, so that the rare earth chloride can selectively dissolved in the solvent so as to be abstracted; and a separation step, in which through solid-liquid separation, the chlorination extracted liquid phase and the solid phase of the rudimental rare earth chloride oxides are separated into a first set of rare earth elements and a second rare earth elements.