高等学校化学学报 ›› 1993, Vol. 14 ›› Issue (5): 593.

• 研究简报 •    下一篇

α-烃基取代吡啶对金(Ⅲ)的萃取研究(Ⅰ)——电离常数的测定和金的萃取行为

甘尉棠, 张毓凡, 董立军, 王忠国, 聂志勤, 梁树森   

  1. 南开大学化学系, 天津 300071
  • 收稿日期:1992-02-19 修回日期:1993-01-04 出版日期:1993-05-24 发布日期:1993-05-24
  • 通讯作者: 甘尉棠

Studies on the Extraction of Gold Using a-Alkyl Substituted Pyridines(Ⅰ)——Determination of the lonization Constant of α-Alkyl Substituted Pyridines and the Extraction Behaviour of Gold

GAN Wei-Tang, ZHANG Yu-Fan, DONG Li-Jun, WANG Zhong-Guo, NIE Zhi-Qin, LIANG Shu-Sen   

  1. Department of Chemistry, Nankai University, Tianjin, 300071
  • Received:1992-02-19 Revised:1993-01-04 Online:1993-05-24 Published:1993-05-24

摘要: 用紫外吸收光谱测定了α-烃基取代吡啶质子化合物的电离常数。比较了各种α-烃基取代吡啶分子的碱性和取代基位阻对金(Ⅲ)萃取的影响。讨论了金(Ⅲ)的萃取机理。还对水相中盐酸的浓度、萃取剂的浓度、稀释剂、温度和阴、阳离子对萃取选择性的影响进行了研究。

关键词: &alpha, -烃基取代吡啶, 金, 溶剂萃取

Abstract: The behaviour of nine kinds of a-alkyl substituted pyridines (Ⅰ) in the extraction of gold in hydrochloric acid media has been investigated.The ionization constants of (Ⅰ) were determined.The effect of the.basicity and steric hindrance in (Ⅰ) on the extraction of gold is also discussed.The experimental results indicate that the order of the extractability of (Ⅰ) is HpPY≈i-HPY>HPY> i-PPY>BePY>PPY>BzPY>BpPY>TfPY.The extracted species are found to be 1:2(Au/I) complex in benzene solution.The extraction mechanism and the influences of the diluent, temperature, common metal ions and various anions on the extraction of Au (Ⅲ) are also studied.

Key words: a-Alkyl substituted pyridines, Gold, Solvent extraction

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