Solvent Extraction of Mercury(II) from Hydrochloric Acid with 1,2-Bis(hexylthio)ethane
作者:Yoshinari Baba、Yutaka Ikeda、Katsutoshi Inoue
DOI:10.1246/bcsj.58.881
日期:1985.3
Solvent extraction of mercury(II) from hydrochloric acid with 1,2-bis(hexylthio)ethane (=BHTE=\barS) in 1,2-dichloroethane has been studied at 30 °C. Mercury(II) was found to be extracted into pure 1,2-dichloroethane without extractants, which is due to the physical partition of the neutral species, HgCl2. The partition coefficient, KD, was evaluated as KD=0.314. It was clarified that the extraction mechanism with BHTE can be explained in terms of solvation by BHTE and that 1:1 metal: the ligand complex is formed in the organic phase as follows.\barS+HgCl2\ightleftharpoons‾HgCl2·S KeThe extraction equilibrium constant, Ke, was evaluated as Ke=1.61×103 dm3 mol−1.
研究了在 30 °C 下用 1,2-二氯乙烷中的 1,2-双(己硫基)乙烷(=BHTE=/barS)从盐酸中溶剂萃取汞(II)的情况。研究发现,汞(II)可以在不使用萃取剂的情况下被萃取到纯净的 1,2-二氯乙烷中,这是由于中性物质 HgCl2 的物理分配所致。分配系数 KD 为 0.314。萃取平衡常数Ke为Ke=1.61×103 dm3 mol-1。