化学学报 ›› 1988, Vol. 46 ›› Issue (5): 496-499. 上一篇    下一篇

研究论文

苯并-15-冠-5和二苯并-18-冠-6萃取分离铟(III)的研究

周雅仙;张宪新   

  1. 郑州大学化学系
  • 发布日期:1988-05-15

Study on extraction of indium (III) by benzo-15-crown-5 and dibenzo-18-crown-6

ZHOU YAXIAN;ZHANG XIANXIN   

  • Published:1988-05-15

本文用斜率法、饱和法以及通过与萃取合物相对应的冠醚配合物晶体的制备及其性质研究, 探讨了In^3^+的萃取机理, 测定并计算了表观萃取平衡常数, 将此萃取体系应用于铟和某些体系应用于铟和某些金属离子的萃取分离, 亦获得较好的结果.

关键词: 铟, 冠式化合物, 萃取, 苯 P, 萃取平衡

The percentage extration of In(III) by 1,2-dichloroethane can be increased greatly by the addition of benzo-15-crown-5 or dibenzo-18-crown-6 in presence of NaBr, KBr, or KI. The concentration conditional extration equilibrium constants K'ex decrease in the order K'ex[K(B-15-C-5)m'InI4] > K'ex[K(B-15-C-5)mInBr4] > K'ex[K(DB-18-C-6)InBr4] > K'ex[Na(B-15-C-5)InBr4] > K'ex[Na(DB-18-C-6)InBr4] (m' = 1.8, m = 1.5). Characteristics of the extractable species and crown ether crystalline complexes corresponding to the extracted complexes are used to explain these results. The effect of other ions in these extration systems indicate selective extration of In(III).

Key words: INDIUM, CROWN ETHER COMPOUNDS, EXTRACTION, BENZENE P, EXTRACTION EQUILIBRIUM

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