| New Environment-Friendly Approach for Bastnasite Metallurgic Treatment (I): Extraction of Tetravalent Cerium from Sulphuric Acid Medium with Di(2-ethylhexyl) Phosphoric Acid |
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| 作者姓名： | 朱兆武 赵娜 龙志奇 李德栋 崔大立 张国成 |
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| 作者单位： | Advanced Materials Co. Ltd. of Beijing General Research Institute of Nonferrous Metals，Beijing 100088，China，Advanced Materials Co. Ltd. of Beijing General Research Institute of Nonferrous Metals，Beijing 100088，China，Advanced Materials Co. Ltd. of Beijing General Research Institute of Nonferrous Metals，Beijing 100088，China，Advanced Materials Co. Ltd. of Beijing General Research Institute of Nonferrous Metals，Beijing 100088，China，Advanced Materials Co. Ltd. of Beijing General Research Institute of Nonferrous Metals，Beijing 100088，China，Advanced Materials Co. Ltd. of Beijing General Research Institute of Nonferrous Metals，Beijing 100088，China |
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| 摘 要： | Bastnasiteisamainsourceofrareearthproducts inwhichCeO2/REOisabout50%.Atpresent,a cidity leachingcombinedwithalkali conversion method1]iscommonlyusedinthebastnasitetreat ment.Thismethodisunfriendlytotheenvironment becausetheradioactiveelementofthoriuman…
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New Environment-Friendly Approach for Bastnasite Metallurgic Treatment (I): Extraction of Tetravalent Cerium from Sulphuric Acid Medium with Di(2-ethylhexyl) Phosphoric Acid |
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| Zhu Zhaowu,ZHAO Na,Long Zhiqi,Li Dedong,Cui Dali,Zhang Guocheng.New Environment-Friendly Approach for Bastnasite Metallurgic Treatment (I): Extraction of Tetravalent Cerium from Sulphuric Acid Medium with Di(2-ethylhexyl) Phosphoric Acid[J].Journal of Rare Earths,2005,23(2). |
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| Authors: | Zhu Zhaowu ZHAO Na Long Zhiqi Li Dedong Cui Dali Zhang Guocheng |
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| Abstract: | The extraction of cerium(IV) from sulphuric acid medium with Di(2-ethylhexyl) phosphoric acid(DEHPA) was studied. The influence of sulphate ion, acidity, extractant concentration as well as the presence of fluoride ion on the extraction of Ce(IV) was investigated, and the extraction mechanism was also discussed. The results show that sulphate ion can inhibit the extraction of Ce(IV) significantly due to its complexation with Ce(IV). Fluoride ion can enhance Ce(IV) extraction dramatically by the formation of CeF22 and less amount of CeF3 which can almost be extracted completely. Nevertheless, in the case as F/Ce(mole ratio) in the initial aqueous phase is approximately more than 1.5, the precipitate will be formed and the extraction can not be progressed smoothly. |
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| Keywords: | cerium(IV) DEHPA solvent extraction rare earths |
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