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Vol. 26 No. 19 (2014): Vol 26 Issue 19

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Solvent Extraction of Pd(CN)42– from Alkaline Cyanide Solution with Dodecyl Trimethylammonium Bromide

https://doi.org/10.14233/ajchem.2014.16478
Lei Chen
Department of Chemistry, Yunnan University, Kunming 650091, P.R. China
Zhangjie Huang
Department of Chemistry, Yunnan University, Kunming 650091, P.R. China
Jing Chen
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. 26 No. 19 (2014): Vol 26 Issue 19

Abstract

The solvent extraction of Pd(CN)42- from alkaline cyanide solution by using dodecyltrimethylammonium bromide diluted in benzene was investigated. It has been indicated that Pd(CN)42- extraction percentage increases by increasing dodecyltrimethylammonium bromide concentration. Extraction parameters of Pd(CN)42-, including appropriate diluting agent, dodecyltrimethylammonium bromide concentration, contact time of aqueous and organic phases, pH of the aqueous solution and organic/aqueous phase ratio, were studied. Octanol has an obvious synergistic effect on Pd(CN)42- extraction with dodecyltrimethylammonium bromide. It was indicated that at dodecyltrimethyl ammonium bromide concentration 0.01 mol L-1, contact time of 10 min, octanol concentration 40 % (v/v), organic/aqueous phase ratio 1, the optimal pH of the aqueous phase11.5, almost all of the Pd(CN)42-(> 99 %) was transferred from the aqueous phase into the organic phase. Ammonium thiocyanate solution could be used as stripping agent. Most of the Pd(CN)42- in the organic phase can be stripped with aqueous solutions of ammonium thiocyanate.

Keywords

Palladium Dodecyltrimethylammonium bromide Alkaline cyanide solution
Chen, L., Huang, Z., Chen, J., & Liu, M. (2014). Solvent Extraction of Pd(CN)42– from Alkaline Cyanide Solution with Dodecyl Trimethylammonium Bromide. Asian Journal of Chemistry, 26(19), 6515–6518. https://doi.org/10.14233/ajchem.2014.16478
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