发明名称 |
EXTRACTION PROCESS |
摘要 |
A method for the selective recovery of uranium from a sulphate-based acidic aqueous solution of uranium containing iron and other metals by means of solvent extraction, in which the extractant used in the organic extraction solution is bis(2-ethylhexyl) phosphate and a liquid branched trialkyl phosphine oxide is the modifying agent. It is typical of the method that the uranium concentration in the feed solution is less than 50 mg/l and a reducing agent is introduced into the aqueous and/or extraction solution to prevent the permanent oxidation of iron to trivalent. In the method the majority of the extraction solution is circulated in a circuit consisting of the extraction stage and the storage tank and only a small part of the uranium-loaded extraction solution is routed to scrubbing and stripping. |
申请公布号 |
EP2531626(A4) |
申请公布日期 |
2014.11.19 |
申请号 |
EP20110739438 |
申请日期 |
2011.01.27 |
申请人 |
OUTOTEC OYJ |
发明人 |
NYMAN, BROR;PAATERO, ERKKI;HULTHOLM, STIG-ERIK;EKMAN, EERO |
分类号 |
C22B3/38;C01G43/00;C22B60/02 |
主分类号 |
C22B3/38 |
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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