| Structure and aggregation behavior of cobalt-di(2-ethylhexy1)-phosphoric acid complexes in solvent extraction systems |
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| 作者姓名： | 吴瑾光 周乃扶 王笃金 俞致健 徐光宪 |
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| 作者单位： | 1. State Key Laboratory of Rare Earth Materials Chemistry and Applications，College of Chemistry and Molecular Engineering，Peking University，Beijing 100871，Ch |
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| 基金项目： | ProjectsupportedbytheNationalNaturalScienceFoundationofChina ,theClimbingProgramofChinaandtheOfficeofBasicEnergySciences(USA),DivisionofChemicalSciences,DepartmentofEnergyunderGrantNo .DE FG0 5 85ER1335 7 |
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| 摘 要： | Ｔｈｅｓｏｌｖｅｎｔｅｘｔｒａｃｔｉｏｎｏｆｃｏｂａｌｔｗｉｔｈｏｒｇａｎｏｐｈｏｓｐｈｏｒｕｓａｃｉｄｉｃｅｘｔｒａｃｔａｎｔｓｉｓｃｈａｒａｃｔｅｒｉｚｅｄｂｙｉｔｓｈｉｇｈｅｒｅｘｔｒａｃｔｉｏｎｓｅｌｅｃｔｉｖｉｔｙｔｈａｎｎｉｃｋｅｌｆｒｏｍａｑｕｅｏｕｓｓｏｌｕｔｉｏｎｓ1].Ｔｈｅｅｘｔｒａｃｔａｂｉｌｉｔｙａｎｄｓｅｌｅｃｔｉｖｉｔｙｏｆｍｅｔａｌｉｏｎｓａｒｅｃｌｏｓｅｌｙｒｅｌａｔｅｄｔｏｔｈｅｃｏｏｒｄｉｎａｔｉｏｎｓｔｒｕｃｔｕｒｅｏｆｍｅｔａｌｓｗｉｔｈｅｘｔｒａｃｔａｎ…
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| 收稿时间： | 3 June 1997 |
Structure and aggregation behavior of cobalt-di (2-ethylhexy1)-phosphoric acid complexes in solvent extraction systems |
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| Jinguang Wu,Naifu Zhou,Dujin Wang,Zhijian Yu,Ronald D. Neuman,Guangxian Xu.Structure and aggregation behavior of cobalt-di(2-ethylhexy1)-phosphoric acid complexes in solvent extraction systems[J].Science in China(Chemistry),1998,41(1):36-44. |
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| Authors: | Jinguang Wu Naifu Zhou Dujin Wang Zhijian Yu Ronald D Neuman Guangxian Xu |
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| Institution: | (1) State Key Laboratory of Rare Earth Materials Chemistry and Applications, College of Chemistry and Molecular Engineering, Peking University, 100871 Beijing, China;(2) Department of Chemical Engineering, Auburn University, 36849 Auburn, AL, USA |
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| Abstract: | Structure and aggregates formed from cobalt di(2 ethylhexyl)phosphoric acid (Co HDEHP) complexes in solvent extraction systems were investigated by FT IR, UV Vis and photon correlation spectroscopic (PCS) techniques. Results showed that the Co HDEHP complex displayed a dehydrated tetrahedral coordination structure of the chelate type in n heptane and the aggregates were rather small. The addition of co surfactant to the solvent produced a series of effect on the physicochemical nature of the molecular aggregates. In the presence of 2 octanol, a partially hydrated octahedral coordination structure was formed in equilibrium with the dehydrated tetrahedral structure for the Co HDEHP aggregates in the organic phase and the equilibrium was found to be affected by the ionic strength of the aqueous phase. Furthermore, the FT IR results showed that Co HDEHP complex in the presence of 2 octanol displayed a bridge coordination between the cobalt and the extractant molecules. |
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| Keywords: | cobalt di(2 ethylhexyl)phosphoric acid coordination aggregation |
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