高等学校化学学报 ›› 1990, Vol. 11 ›› Issue (5): 511-515.

• 研究论文 • 上一篇    下一篇

螯合树脂研究(ⅩⅢ)——以聚硫醚为主链的氨基吡啶树脂的合成及吸附性能

董世华, 刘芳, 胡运华   

  1. 武汉大学化学系
  • 收稿日期:1988-09-02 出版日期:1990-05-24 发布日期:1990-05-24
  • 通讯作者: 董世华

Studies on Chelate Resins (ⅩⅢ) —— Syntheses and Adsorption Properties of New Chelating Resins with a Polythioether Backbone Bearing Pyridylamino Groups

Dong Shihua, Liu Fang, Hu Yunhua   

  1. Department of Chemistry, Wuhan University, Wuhai
  • Received:1988-09-02 Online:1990-05-24 Published:1990-05-24

摘要: 聚环硫氯丙烷与各种氨基吡啶在二乙烯三胺存在下反应,合成了3种主链为聚硫醚、侧链带有吡啶基氨基的新型螯合树脂。它们对贵金属具有优良的吸附性能和高的吸附选择性。并通过X射线光电子能谱初步探讨了树脂对金属离子的螯合作用。

关键词: 螯合树脂, 聚环硫氯丙烷, 氨基吡啶, 贵金属, X射线光电子能谱

Abstract: Three new chelating resins (PTAP- Ⅰ, PTAP- Ⅱ and PTAP- Ⅲ ) with a polythioether backbone bearing pyridylamino groups are first synthesized by the amination of poly-chloromethylthiirane with various aminopyridine (i. e. 2-aminopyridine, 3-aminopyridine and 4-aminopyridine) by using diethylenetriamine as the crosslinking agent. These resins cheJate strongly with Ag( Ⅰ ), Au( Ⅲ ) and Pd( Ⅱ ), moderately with Pt(Ⅳ), Hg( Ⅱ ) and Cu( Ⅱ ), as well as weakly with Zn( Ⅱ ) and Cd( Ⅱ ), whereas Pb( Ⅱ ) could not be chelated. PTAPresins possess excellent selectivity for noble metal ions. Au(3) or Pd( Ⅱ ) is only adsorbed from the solution of salts including Au( Ⅲ ) or Pd( Ⅱ ), Zn( Ⅱ ), Hg( Ⅱ ) and Cd( Ⅱ ) etc. In addition, from the mixed solution of PdCl2 and H2PtCl6 Palladium( Ⅱ ) is adsorbed, but platinum(Ⅳ ) can hardly be adsorbed. The influence of acidity of medium on adsorption efficiency of PTAP for Au( Ⅲ ), Pd( Ⅱ ), Pt( Ⅳ ) is also investigated.

Key words: Chelating resins, Polychloromethylthiirane, Aminopyridine, Noble metals, X-ray photo- electric spectrometry