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Vol. 27 No. 1 (2015): Vol 27 Issue 1

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Solvent Extraction of Palladium(II) from Alkaline Cyanide Solution by Benzyl Dimethyl-n-dodecylammonium Chloride

https://doi.org/10.14233/ajchem.2015.18666
Yan Liu
Department of Chemistry, Yunnan University, Kunming 650091, P.R. China
Jinfei Li
Department of Chemistry, Yunnan University, Kunming 650091, P.R. China
Jiaxi Chen
Department of Chemistry, Yunnan University, Kunming 650091, P.R. China
Zhangjie Huang
Department of Chemistry, Yunnan University, Kunming 650091, P.R. China
Minhong Liu
Department of Chemistry, Yunnan University, Kunming 650091, P.R. China

Corresponding Author(s) : Zhangjie Huang

zhjhuang@ynu.edu.cn

Asian Journal of Chemistry, Vol. 27 No. 1 (2015): Vol 27 Issue 1

Abstract

This paper investigates the extraction of Pd(CN)42- from an alkaline cyanide solution by quaternary ammonium benzyl dimethyl-n-dodecylammonium chloride (BDMDC) with 2-ethyl hexanol as modifier. Several factors affecting extraction efficiency, including benzyl dimethyl-n-dodecylammonium chloride concentration, modifier content, equilibrium time, phase ratio (A/O) and pH values in the aqueous phase, were studied. The results indicated that nearly all of the Pd(II) (> 99 %) was transferred from the aqueous phase into the organic phase. The extraction was quite fast and equilibrium could be established within 5 min. Most of Pd(II) (> 95 %) in the organic phase could be stripped with aqueous solutions of KSCN. The relationship between log D against log[BDMDC] plot indicate that the stoichiometry of the extracted species is a 2:1 complex, namely, (BDMD+)2·[Pd(CN)42-].

Keywords

Palladium Benzyl dimethyl-n-dodecylammonium chloride Alkaline cyanide solution
Liu, Y., Li, J., Chen, J., Huang, Z., & Liu, M. (2014). Solvent Extraction of Palladium(II) from Alkaline Cyanide Solution by Benzyl Dimethyl-n-dodecylammonium Chloride. Asian Journal of Chemistry, 27(1), 385–388. https://doi.org/10.14233/ajchem.2015.18666
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