| DIBK-TBP体系萃取分离锆铪的机理 |
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| 引用本文： | 徐志高,王力军,吴延科,池汝安,张力.DIBK-TBP体系萃取分离锆铪的机理[J].中国有色金属学报,2012(8):2374-2381. |
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| 作者姓名： | 徐志高 王力军 吴延科 池汝安 张力 |
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| 作者单位： | 武汉工程大学绿色化工过程教育部重点实验室;北京有色金属研究总院矿物资源与冶金材料研究所 |
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| 基金项目： | 国家自然科学基金资助项目(51174146);国家“十二五”科技支撑计划资助项目(2012BAB10B10);教育部科学技术研究重点项目(212110);湖北省教育厅优秀中青年人才项目(Q20111509);武汉工程大学科学研究基金资助项目(10125042) |
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| 摘 要： | 为了解二异丁基甲酮(DIBK)-TBP体系萃取锆铪的化学行为,分别采用斜率法和饱和容量法研究DIBK和TBP在HSCN介质中协同萃取锆铪的性能及机理,结果表明:DIBK-TBP体系萃取分离锆铪时优先萃取铪,萃取反应机理为溶剂化机理,萃合物中Zr4+(Hf4+)、TBP、DIBK的摩尔比为1:1:1,其萃合物组成分别为Zr(SCN)4.TBP.DIBK和Hf(SCN)4.TBP.DIBK,并通过对负载有机相进行红外光谱分析进一步确定了萃合物可能的结构式;DIBK和TBP协同使用可以改善HSCN介质下锆铪的萃取分离效果。
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| 关 键 词： | 二异丁基甲酮 锆 铪 萃取 机理 |
Mechanisms of extraction and separation of zirconium and hafnium using mixtures of DIBK and TBP |
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| XU Zhi-gao,WANG Li-jun,WU Yan-ke,CHI Ru-an,ZHANG Li.Mechanisms of extraction and separation of zirconium and hafnium using mixtures of DIBK and TBP[J].The Chinese Journal of Nonferrous Metals,2012(8):2374-2381. |
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| Authors: | XU Zhi-gao WANG Li-jun WU Yan-ke CHI Ru-an ZHANG Li |
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| Affiliation: | 1.Key Laboratory for Green Chemical Process of Ministry of Education,Wuhan Institute of Technology, Wuhan 430073,China; 2.Division of Mineral Resources,Metallurgy and Materials,General Research Institute for Nonferrous Metals, Beijing 100088,China) |
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| Abstract: | To master the chemical behavior of the extraction of hafnium from zirconium in the diisobutyl ketone(DIBK)-TBP system and to guide the practical application of the DIBK-TBP system,the mechanism and characteristics about synergistic extraction of zirconium and hafnium by DIBK and TBP from thiocyanic acid medium were studied through the methods of slope coefficient and saturated volumetric.The results show that hafnium is extracted preferentially in DIBK-TBP system,the reactions of extraction follow the solvate theory.The composition of extracted complex was determined as n(Zr4+(Hf4+)):n(TBP):n(DIBK)=1:1:1,and identified as Zr(SCN)4?TBP?DIBK and Hf(SCN)4?TBP?DIBK,and the possible synergistic extraction complexes structures were further confirmed through the infrared spectra of the loaded organic phase.The extraction and separation effect for zirconium and hafnium can be improved with synergistic mixture of DIBK and TBP. |
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| Keywords: | diisobutyl ketone zirconium hafnium extraction mechanism |
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