| 煤油体系中采用D2EHPA,EHEHPA,CYANEX 272从硫酸介质中萃取钒（IV）的机理及热力学（英文） |
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| 引用本文： | 李兴彬,魏昶,吴钧,李存兄,李旻廷,邓志敢,徐红胜. 煤油体系中采用D2EHPA,EHEHPA,CYANEX 272从硫酸介质中萃取钒（IV）的机理及热力学（英文）[J]. 中国有色金属学会会刊, 2012, 22(2): 461-466. DOI: 10.1016/S1003-6326(11)61199-0 |
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| 作者姓名： | 李兴彬 魏昶 吴钧 李存兄 李旻廷 邓志敢 徐红胜 |
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| 作者单位： | 昆明理工大学冶金与能源工程学院 |
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| 基金项目： | Project (2009AA06Z106) supported by the High-tech Research and Development Program of China;Project (51174104) supported by the National Natural Science Foundation of China;Project (20115314110001) supported by the Doctoral Fund of Ministry of Education of China |
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| 摘 要： | 采用有机磷类萃取剂—D2EHPA,EHEHPA和CYANEX 272在煤油体系中从硫酸介质中萃取钒（IV）。考察溶液pH值、萃取剂浓度、钒离子浓度、温度对钒萃取性能的影响,并确定萃合物的组成。结果表明：随着水相pH值、萃取剂浓度和温度的升高,钒（IV）的分配比增大。D2EHPA可以在更低的pH值下萃取钒（IV）,表明其对钒的萃取能力大于EHEHPA和CYANEX 272。萃取机理研究结果表明：3种有机磷类萃取剂对钒的萃取均符合离子交换机理,在低pH值条件下萃合物组成为VOR2（HR）2,在高pH值下萃合物组成为VOR2（R表示萃取剂）。
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| 关 键 词： | 钒 溶剂萃取 D2EHPA EHEHPA CYANEX 272 |
| 收稿时间： | 2011-01-07 |
Thermodynamics and mechanism of vanadium(IV) extraction from sulphate medium with D2EHPA,EHEHPA and CYANEX 272 in kerosene |
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| LI Xing-bin,WEI Chang,WU Jun,LI Cun-xiong,LI Min-ting,DENG Zhi-gan,XU Hong-sheng. Thermodynamics and mechanism of vanadium(IV) extraction from sulphate medium with D2EHPA,EHEHPA and CYANEX 272 in kerosene[J]. Transactions of Nonferrous Metals Society of China, 2012, 22(2): 461-466. DOI: 10.1016/S1003-6326(11)61199-0 |
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| Authors: | LI Xing-bin WEI Chang WU Jun LI Cun-xiong LI Min-ting DENG Zhi-gan XU Hong-sheng |
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| Affiliation: | LI Xing-bin,WEI Chang,WU Jun,LI Cun-xiong,LI Min-ting,DENG Zhi-gan,XU Hong-she ng Faculty of Metallurgical and Energy Engineering,Kunming University of Science and Technology,Kunming 650093,China |
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| Abstract: | Extraction of vanadium(IV) from sulphate acid solution was studied using organophosphorous-based extractants D2EHPA,EHEHPA and CYANEX 272 in kerosene.The different parameters affecting the extraction of vanadium(IV) under equilibrium conditions were separately investigated to elucidate the stoichiometry of the extracted species.The distribution ratio of vanadium increased with increasing equilibrium pH of the aqueous phase,concentration of the extractants and temperature.D2EHPA was found to be a stronger extractant,having greater pH functionality than EHEHPA and CYANEX 272.Extraction of vanadium(IV) by these organophosphorous-based extractants involved cation exchange mechanism,and the extracted species appear to be VOR2(HR)2 in the low equilibrium pH and VOR2 in the higher equilibrium pH,where HR refers to the three acidic extractants. |
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| Keywords: | vanadium solvent extraction D2EHPA EHEHPA CYANEX 272 |
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