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 |
A method is described for recovering rare earth elements from a solid mixture including a halophosphate and at least one compound of one or more rare earth elements. The method includes: (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. |
申请公布号 |
US8501124(B2) |
申请公布日期 |
2013.08.06 |
申请号 |
US201013264303 |
申请日期 |
2010.04.02 |
申请人 |
BRACONNIER JEAN-JACQUES;ROLLAT ALAIN;RHODIA OPERATIONS |
发明人 |
BRACONNIER JEAN-JACQUES;ROLLAT ALAIN |
分类号 |
C01F17/00 |
主分类号 |
C01F17/00 |
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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