| 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
COPYRIGHT : (C)2019, JPO&INPIT |
客服热线：
手机版
二维码
