| 杂环胺双齿配体萃取希土元素 Ⅳ.邻菲绕啉-苦味酸阴离子体系 |
| SOLVENT EXTRACTION OF RARE EARTH ELEMENTWITH BIDENTATE HETEROCYCLIC AMINE LIGANDSIV. BETWEEN 1,10-PHENANTHROLINE AND PICRATE SYSTEM |
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| 摘要: 本文研究了弱碱性杂环胺双齿配体邻菲绕啉(phen)在苦味酸盐介质中对15个希土元素(除Pm)的萃取行为和萃合物组成。发现选择有效半径较大的苦味酸作为伴随阴离子时,La、Ce、Pr、Nd等生成phen 配位数为4的萃合物Er、Tm、Yb、Lu、Y等生成phen配位数为1的萃合物,Eu、Gd、Tb、生成含2个phen的萃合物,Sm、Dy、Ho则在phen浓度不同时,生成不同组成的萃合物所有萃合物中苦味酸阴离子数均为3。希土-邻菲绕啉-苦味酸阴离子体系中,logD～Z曲线呈下降趋势的“四分组效应,钇的logD低于所有镧系无素,因此钇与轻希土易于得到分离。 |
| 关键词: 溶剂萃取 邻菲绕啉 苦味酸 希土 |
| 基金项目: |
| Abstract: The solvent extraction behavior of rare earth element (Ⅲ) with 1,10-phenanthroline (phen) in solution of picrate (pic.) have been investigated between chloroform and aqueous solution. The experiments show that the effective radius of accompanying anion (pic-, is 7Å) directly influences extractive compound coordination number and extraction order bf the 15 rare earth element (Ⅲ). We determine the composition ratio of the complexes by slope method and continous method . It is found that the light lanthanons are easy to produce higher coordination compounds, the heavy lanthanons are easy to produce lower coordination number ones. The curve logD-Z exists "inverse order tetrad effect" In addition we compare extraction order of different accompanying anions and desire to separate Y(Ⅲ) from other rare earth elements. |
| Keywords: solvent extraction picric acid 1,10-phenanthroline rare earth |
| 投稿时间：1988-01-25 |
| 摘要点击次数: 1658 |
| 全文下载次数: 1889 |
| 倪兆艾,郑晓玲.杂环胺双齿配体萃取希土元素 Ⅳ.邻菲绕啉-苦味酸阴离子体系[J].无机化学学报,1990,6(2):187-192. |
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