| 发明名称 |
A method for re-extraction of rare-earth metals from organic solutions and preparing concentrate of rare-earth metals |
| 摘要 |
The present invention relates to a method for recovery of rare earth metals (REM) from diluted aqueous acidic solutions comprising steps of liquid-phase extraction of REM into an organic phase and re-extraction of REM from the organic phase. The re-extraction is carried out by precipitation of REM as a solid phase in the form of a poorly soluble salt of a strong acid (pKa<0). Recovery of REM into the concentrate is up to 99% in the course of one stage of the re-extraction. |
| 申请公布号 |
US2016024616(A1) |
申请公布日期 |
2016.01.28 |
| 申请号 |
US201314773739 |
申请日期 |
2013.11.08 |
| 申请人 |
OPENED JOINT STOCK COMPANY "UNITED CHEMICAL COMPANY URALCHEM" |
发明人 |
Genkin Mikhail Vladimirovich;Evtushenko Aleksey Vladimirovich;Komkov Aleksey Aleksandrovich;Safiulina Alfiya Minerovna;Spiridonov Vasiliy Sergeevich;Shvetsov Sergey Vladimirovich |
| 分类号 |
C22B59/00;C22B3/20 |
主分类号 |
C22B59/00 |
| 代理机构 |
|
代理人 |
|
| 主权项 |
1. A method for recovery of rare earth metals (REM) from diluted aqueous acidic solution comprising:
liquid-phase extraction of REM into an organic phase and re-extraction of REM from the organic phase; wherein the re-extraction is carried out by precipitation of REM as a solid phase in the form of a poorly soluble salt of a strong acid (pKa<0). |
| 地址 |
Moscow RU |
