METHOD FOR SEPARATING ALUMINUM FROM COMPOSITE OXIDE OF REAR EARTH ELEMENTS AND ALUMINUM

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PROBLEM TO BE SOLVED : To provide a method for separating aluminum from composite oxide of rear earth elements and aluminum. SOLUTION : A method includes at least (1) a process for melting composite oxide of rear earth elements and aluminum with a boron source, (2) a process for dissolving the resulting molten article in hydrochloric acid and/or nitric acid, (3) a process for adding a precipitant to the resulting solution to obtain a precipitate of the rear earth elements, and (4) a process for separating the resulting precipitate of the rear earth elements from the solution. SELECTED DRAWING : Figure 2 COPYRIGHT : (C)2018, JPO&INPIT