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| 仲辛基苯氧基乙酸从稀土中萃取分离钪及其机理 | |
| 引用本文： | 薄其兵,陆军,李德谦,张秀英,叶伟贞.仲辛基苯氧基乙酸从稀土中萃取分离钪及其机理[J].分析化学,2001,29(1):45-48. |
| 作者姓名： | 薄其兵 陆军 李德谦 张秀英 叶伟贞 |
| 作者单位： | 1. 中国科学院稀土化学与物理开放实验室, 2. 河南师范大学化学系, 3. 中国科学院上海有机化学研究所, |
| 基金项目： | 国家重点基础研究发展规划项目! (G19980 613 0 2 )，国家自然科学基金! (No .2 97710 2 8，2 980 10 0 4)资助课题 |
| 摘 要： | 首次研究了一种新型萃取剂仲辛基苯氧基乙酸 (CA 12 )萃取钪的性能及其机理。通过研究平衡水相酸度、萃取剂浓度和温度对萃取平衡的影响 ,用斜率法和等摩尔系列法确定了CA 12萃取钪的机理 ,并求得了CA 12萃取钪的热力学函数 ,计算了平衡反应的浓度平衡常数及钪同其它稀土离子的分离系数 ,指出CA 12是一种从稀土 中分离钪的优良萃取剂 |
| 关 键 词： | 钪 仲辛基苯氧基乙酸 萃取分离 |
| 修稿时间： | 2000年1月26日 |
Extraction Separation and Mechanism of Scandium by sec-Octylphenoxy Acetic Acid from Other Rare Earth Elements |
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| Bo Qibing.Extraction Separation and Mechanism of Scandium by sec-Octylphenoxy Acetic Acid from Other Rare Earth Elements[J].Chinese Journal of Analytical Chemistry,2001,29(1):45-48. | |
| Authors: | Bo Qibing |
| Abstract: | The extraction behavior of Sc using se c-octylphenoxyl aceticacid (HA) as extractant from 0.2 mol/L ammonium chloride media has been investigated systematically. The extraction stoichiometry and the extraction constants was found by slope and constant molarity methods. It was demonstrated Sc? was extracted by CA-12 as a complex ScA3.HA. The results also showed that the temperature affected the extraction and the equilibrium constant, the Gibbs energy change and the entropy change of the extraction reaction were calculated. The extraction phenomena and the separation factor between Sc（Ⅲ） a nd other trivalent rare earths with sec-octylphenoxyl acetic acid were better than those with naphthenic acid which is widely used in Sc（Ⅲ） separation. It sh owed sec-octylphenoxyl acetic acid was a valuable extractant which could be employed to replace naphthenic acid. |
| Keywords: | Scandium sec octylphenoxyl acetic acid extraction separation |
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