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| Preparation of Mixed Rare Earth Chloride with Low Impurity from Rare Earth Sulfate Lixivium by P507 |
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Received:July 06, 2021
Revised:July 22, 2021
Accepted:July 24, 2021
Published Online:October 20, 2021
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| DOI：doi：10.3969/j.issn.1007-7545.2021.11.009 |
| KeyWord:mixed rare earth chloride; transformation; countercurrent cascade extraction |
| Author | Institution |
| SANG Xiao-yun |
中国北方稀土（集团）高科技股份有限公司冶炼分公司 |
| ZHANG Yong-hua |
中国北方稀土（集团）高科技股份有限公司冶炼分公司 |
| GUO Hui |
中国北方稀土集团高科技股份有限公司冶炼分公司 |
| GAO Yuan |
中国北方稀土集团高科技股份有限公司冶炼分公司 |
| XING Quan-sheng |
中国北方稀土集团高科技股份有限公司冶炼分公司 |
| LI Xu |
中国北方稀土集团高科技股份有限公司冶炼分公司 |
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| Abstract: |
| One step transition process was frequently used in transformation of infusion through P507, but content of non-rare earth impurity in mixed rare earth chloride was higher. Mixed rare earth chloride was prepared by simulation of countercurrent cascade extraction, and changes of content of non-rare earth impurity in reverse extraction solution were investigated. The results show that contents of Mn4+, Zn2+, SO42-, Mg2+ and Ca2+ in extraction solution drop by more than 50% compared with original extraction process under the conditions including extraction mixing time of 9 min above, pH value of extraction solution of 4, pH value of acidity of washing solution of 1.5, stripping volume ratio of 20, and extraction solution of 6 mol/L. |
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