应用化学 ›› 1993, Vol. 0 ›› Issue (2): 13-16.

• 研究论文 • 上一篇    下一篇

以环硫丙基丁基醚的低聚物为流动载体的液膜体系中银的迁移特性

徐羽梧, 王颖, 董世华   

  1. 武汉大学化学系 430072 武汉
  • 收稿日期:1992-02-28 修回日期:1992-07-28 出版日期:1993-04-10 发布日期:1993-04-10
  • 基金资助:
    国家自然科学基金资助课题

TRANSPORT OF Ag (Ⅰ)THROUGH LIQUID MEMBRANE CONTAINING AN OLIGOMER OF EPITHIOPROPYL BUTYL ETHER

Xu Yuwu, Wang Ying, Dong Shihua   

  1. Department of Chemistry, Wuhan University, 430072 Wuhan
  • Received:1992-02-28 Revised:1992-07-28 Published:1993-04-10 Online:1993-04-10

摘要: 以环硫丙基丁基醚的低聚物为流动载体,用整体型液膜装置研究了银(Ⅰ)在AgNO3(水溶液)/1,2-二氯乙烷/NH3(水溶液)体系中的迁移特性。无载体时Ag(Ⅰ)不被迁移,有载体时在适当条件下Ag(Ⅰ)可从原料液全部迁移至接收液。Ag(Ⅰ)的迁移速率与载体浓度、液膜厚度、原料液中Ag(Ⅰ)的浓度和酸度以及接收液中添加剂有关。低聚物载体对Ag(Ⅰ)有优良的迁移选择性,原料液中同时含Ag(Ⅰ)、K(Ⅰ)、Cu(Ⅱ)、Zn(Ⅱ)时,只有Ag(Ⅰ)被迁移至接收液,从而得以分离。

关键词: 液膜分离, 环硫丙基丁基醚, 低聚物, 银离子

Abstract: The oligomer of epithiopropyl butyl ether (PSB) with Mn=1600 was synthesized and its transport properties as a mobile carrier for Ag (Ⅰ) in bulk liquid membrane system were studied. It was found that the presence of the oligomer carrier in liquid membrane is necessary for transport of Ag (Ⅱ) and the transportion rate of Ag (Ⅰ) is dependent on the carrier concentration in liquid membrane, the thickness of liquid membrane,the acidity and the concentration of Ag(Ⅰ) in source phase and the additives in receiving phase. In the system AgNO3 (aq)/PSB-ClCH2CH2Cl/NH3·H2O(aq),Ag(Ⅰ) can be transported from source phase to receiving phase completely under the appropriate conditions and only the Ag(Ⅰ) can be transported to receiving phase selectively from Ag(Ⅰ)-K(Ⅰ)-Cu (Ⅱ)-Zn (Ⅱ) mixtrue. The carrier can be used repeatedly without marked lose of its activity and selectivity.

Key words: liquid membrane separation, silver, oligomer, epithiopropy1 buty1 ether