| Synergistic extraction of cerium from sulfuric acid medium using mixture of 2-ethylhexyl phosphonic acid mono 2-ethylhexyl ester and Di-（2-ethyl hexyl） phosphoric acid as extractant |
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| 引用本文： | 罗兴华,黄小卫,朱兆武,龙志奇,刘营.Synergistic extraction of cerium from sulfuric acid medium using mixture of 2-ethylhexyl phosphonic acid mono 2-ethylhexyl ester and Di-（2-ethyl hexyl） phosphoric acid as extractant[J].中国稀土学报(英文版),2009,27(1):119-122. |
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| 作者姓名： | 罗兴华 黄小卫 朱兆武 龙志奇 刘营 |
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| 作者单位： | National Eenineering Research Center for Rare Earth Materials,General Research Institute for Nonferrous;Grirem Advanced Materials Co., Ltd., Beijing 100088, China
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| 基金项目： | 国家高技术研究发展计划(863计划)，国家重点基础研究发展规划(973计划) |
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| 摘 要： |
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| 关 键 词： | 乙基己基酯 协同萃取 硫酸介质 混合使用 膦酸 磷酸 酸萃取 HDEHP |
| 收稿时间： | 10 December 2007 |
Synergistic extraction of cerium from sulfuric acid medium using mixture of 2-ethylhexyl phosphonic acid mono 2-ethylhexyl ester and Di-(2-ethyl hexyl)phosphoric acid as extractant |
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| LUO Xinghua,HUANG Xiaowei,ZHU Zhaowu,LONG Zhiqi,LIU Ying.Synergistic extraction of cerium from sulfuric acid medium using mixture of 2-ethylhexyl phosphonic acid mono 2-ethylhexyl ester and Di-(2-ethyl hexyl)phosphoric acid as extractant[J].Journal of Rare Earths,2009,27(1):119-122. |
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| Authors: | LUO Xinghua HUANG Xiaowei ZHU Zhaowu LONG Zhiqi LIU Ying |
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| Affiliation: | (National Engineering Research Center for Rare Earth Materials, General Research Institute for Nonferrous Metals; Grirem Advanced Materials Co., Ltd., Beijing 100088, China) |
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| Abstract: | Synergistic extraction of cerium(IV) from sulfuric acid medium using mixture of 2-ethylhexyl phosphonic acid mono 2-ethylhexyl ester(HEH/EHP, HL) and Di-(2-ethyl hexyl) phosphoric acid (HDEHP, HA) as extractant was investigated. The results indicated that the maximum synergistic enhancement coefficients were obtained at the mole fraction of HEH/EHP=0.6, and cerium(IV) was extracted into organic phase in the form of Ce(SO4)0.5HL2A2. A cation exchange mechanism was proposed for the synergistic extraction of Ce(IV). The equilibrium constants and thermodynamic functions such as △G, △H, and △S were determined in the extraction of Ce(IV) from sulfuric medium using mixture of HEH/EHP and HDEHP. |
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| Keywords: | synergistic extraction cerium HEH/EHP HDEHP sulfuric acid medium rare earths |
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