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

稀土学报(英文版), 2009, 27(1): 119-122. doi: 10.1016/S1002-0721(08)60204-5

^1, , ^2, , ^3, , ^4, , ^5,

1.National Eenineering Research Center for Rare Earth Materials,General Research Institute for Nonferrous;Grirem Advanced Materials Co., Ltd., Beijing 100088, China

2.National Eenineering Research Center for Rare Earth Materials,General Research Institute for Nonferrous;Grirem Advanced Materials Co., Ltd., Beijing 100088, China

3.National Eenineering Research Center for Rare Earth Materials,General Research Institute for Nonferrous;Grirem Advanced Materials Co., Ltd., Beijing 100088, China

4.National Eenineering Research Center for Rare Earth Materials,General Research Institute for Nonferrous;Grirem Advanced Materials Co., Ltd., Beijing 100088, China

5.National Eenineering Research Center for Rare Earth Materials,General Research Institute for Nonferrous;Grirem Advanced Materials Co., Ltd., Beijing 100088, China

基金项目: 国家高技术研究发展计划(863计划)(2006AA06Z123) 国家重点基础研究发展规划(973计划)(2006BAC02A06) of China)

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

LUO Xinghua ^1, , HUANG Xiaowei ^2, , ZHU Zhaowu ^3, , LONG Zhiqi ^4, , LIU Ying ^5,

1.National Eenineering Research Center for Rare Earth Materials,General Research Institute for Nonferrous;Grirem Advanced Materials Co., Ltd., Beijing 100088, China

2.National Eenineering Research Center for Rare Earth Materials,General Research Institute for Nonferrous;Grirem Advanced Materials Co., Ltd., Beijing 100088, China

3.National Eenineering Research Center for Rare Earth Materials,General Research Institute for Nonferrous;Grirem Advanced Materials Co., Ltd., Beijing 100088, China

4.National Eenineering Research Center for Rare Earth Materials,General Research Institute for Nonferrous;Grirem Advanced Materials Co., Ltd., Beijing 100088, China

5.National Eenineering Research Center for Rare Earth Materials,General Research Institute for Nonferrous;Grirem Advanced Materials Co., Ltd., Beijing 100088, China

Keywords： synergistic extraction

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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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

参考文献