| 简介 |
PROBLEM TO BE SOLVED : To provide a method for producing a carbonate of a rare earth element, capable of : disposing of a carbonic acid gas generated during a thermal process in the presence of carbon, the object to be treated, to which oxidation treatment has been conducted, without releasing the carbonic acid gas in the air; and capable of obtaining an oxide of the rare earth element in which a boron content is reduced, by reducing the boron content at lower cost even when the oxide of the rare earth element, separated from an iron family element, contains e.g. boron.SOLUTION : This invention relates to a method for producing a carbonate of a rare earth element, capable of changing into an oxide of a rare earth element easily, the method including : supplying the oxide of rare earth element, thermally treated at 1, 150°C or more in the presence of carbon, the object to be treated, to which oxidation treatment has been treated, to a solution of a rare earth element having pH of 5.5 or more but less than 7.5; and precipitating the carbonate of the rare earth element by feeding carbonic acid gas.SELECTED DRAWING : None |
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