发明名称 |
METHOD FOR RECOVERING RARE EARTH ELEMENTS FROM A SOLID MIXTURE CONTAINING A HALOPHOSPHATE AND A COMPOUND OF ONE OR MORE RARE EARTH ELEMENTS |
摘要 |
<p>The invention relates to a method for recovering rare earth elements from a solid mixture containing a halophosphate and at least one compound of one or more rare earth elements, including: (a) acid etching the mixture; (b) adding a base to bring the pH back up to a value of at least 1,5; (c) etching the solid from step (b) with a solution of soda or potash; (d) acid etching the solid from step (c) until a pH of less than 7 is obtained, resulting in a solid phase and a liquid phase including at least one rare earth salt, and separating the solid phase from the liquid phase.</p> |
申请公布号 |
WO2010118967(A1) |
申请公布日期 |
2010.10.21 |
申请号 |
WO2010EP54460 |
申请日期 |
2010.04.02 |
申请人 |
RHODIA OPERATIONS;BRACONNIER, JEAN-JACQUES;ROLLAT, ALAIN |
发明人 |
BRACONNIER, JEAN-JACQUES;ROLLAT, ALAIN |
分类号 |
C01B25/32;C01B25/37;C01F17/00;C09K11/01;H01J9/52 |
主分类号 |
C01B25/32 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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