发明名称 |
PROCESS FOR RECOVERING RARE EARTH OXIDE FROM WASTE LIQUID CONTAINING RARE EARTH ELEMENT, AND PROCESS FOR PRODUCING RARE EARTH OXIDE USING SAME |
摘要 |
<p>ABSTRACT Rare earth oxides capable of being re-used as an abrasive are recovered from an abrasive waste liquid by a process comprising the steps of (1) mixing and heating a rare earth element-containing waste liquid with an acid, to dissolve rare earth elements contained in the liquid; (2) removing insoluble matter from the rare earth element solution; (3) incorporating a soluble carbonate salt or a soluble hydrogencarbonate salt, or an oxalic acid in the rare earth element solution, to convert the rare earth elements to rare earth carbonates or rare earth oxalates; (4) separating the rare earth carbonates or rare earth oxalates from a slurry of the rare earth carbonates or rare earth oxalates; (5) baking the separated rare earth carbonate or rare earth oxalate to produce rare earth oxides; and (6) recovering the rare earth oxides.</p> |
申请公布号 |
AU2003238154(A1) |
申请公布日期 |
2003.12.22 |
申请号 |
AU20030238154 |
申请日期 |
2003.06.09 |
申请人 |
SHOWA DENKO K.K. |
发明人 |
FUMIO IMAI;KATSURA ITO;HIROSHI SAEGUSA |
分类号 |
C01F17/00;C09K3/14;C22B3/44;C22B7/00;C22B59/00;(IPC1-7):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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