Metallurgical Engineering

Metallurgical Engineering

Extraction Mechanism of Palladium from chloride solution by TBP-Kerosene

Document Type : Research Paper

Authors
Nima Sadeghi
Eskandar Keshavarzalamdari
moloud Saeedi
Abstract
In this work, a basic study for extraction of palladium (Pd) from the chloride solution by a TBP-kerosene extractant was carried out. Based on thermodynamic Data of species in the Cl–Pd system, and  complexes can be stable in low and high concentration of Cl- , respectively. The palladium recovery decreases with the increase in concentrations of hydrochloric acid and chloride salts (NaCl) in the aqueous. The affinity of TBP for Pd extraction changes with chloride species changing.   Extraction affinity is higher than  as extraction percent 58% and 8% at 0.25 mol/l TBP, respectively. By the use of slope analysis method the organometallic complex of palladium and TBP, formed in the organic phase, was proposed as  . whereas  couldn't be extracted from aqueous media.
Keywords
Solvent extraction
Mechanism
palladium chloride complexes
tri butyl phosphate
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  • Receive Date 21 March 2014