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http://dx.doi.org/10.7844/kirr.2013.22.5.29

Separation of Platinum(IV) and Rhodium(III) from Acidic Chloride Solution by Solvent Extraction with Tri 2-Ethylhexyl Amine(TEHA)  

Sun, Pan-Pan (Department of Advanced Materials Science & Engineering, Mokpo National University)
Lee, Man-Seung (Department of Advanced Materials Science & Engineering, Mokpo National University)
Publication Information
Resources Recycling / v.22, no.5, 2013 , pp. 29-34 More about this Journal
Abstract
Solvent extraction experiments were performed to separate platinum and rhodium from mixed chloride solution by using tri 2-ethylhexyl amine (TEHA) and its mixture with TBP and LIX 63. Effects of extraction conditions on the separation of the two metals were investigated as a function of extractant concentration in the HCl concentration range from 1 to 9 M. The concentration of Pt (IV) and Rh(III) was controlled to $1{\times}10^{-3}M$ and $2{\times}10^{-4}M$, respectively. In the extraction with TEHA and its mixture, Pt was quantitatively extracted irrespective of HCl concentration, while the extraction percentage of Rh depended on the extraction condition. When the concentration of HCl in the mixed solution was low, the extraction of Rh was nil and separation of Pt and Rh was possible. Adding TBP to TEHA had little effect on the extraction of both metals, while adding LIX63 to TEHA favored the extraction of Rh.
Keywords
Platinum(IV); Rhodium(III); HCl; TEHA; Solvent extraction;
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Times Cited By KSCI : 3  (Citation Analysis)
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