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Palladium Extraction from Nitric Acid Solutions by LIX 84 and LIX 860-I |
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| Authors: | María P Elizalde María del Sol Rúa Begoña Menoyo |
| Affiliation: | 1. Department of Analytical Chemistry, Faculty of Science and Technology, University of the Basque Country (UPV/EHU), Bilbao, Spainmaria.elizalde@ehu.eus![ORCID Icon]({"type":"image","src":"/templates/jsp/images/orcid.png"} "ORCID Icon") https://orcid.org/0000-0001-9128-4472;3. Department of Analytical Chemistry, Faculty of Science and Technology, University of the Basque Country (UPV/EHU), Bilbao, Spain |
| Abstract: | ABSTRACTThe extraction of Pd(II) from weakly nitric acid solutions by LIX 84 (2-hydroxy-5-nonylacetophenone oxime) and LIX 860-I (5-dodecylsalicylaldoxime) dissolved in toluene has been studied and compared from the viewpoint of extraction equilibria. The effects of pH, nitrate ions and metal and extractant concentrations on the palladium distribution ratio have been quantified. The extraction rate of Pd(II) from this media is slow but the metal is quantitatively extracted by adding just the stoichiometric amount of the extractants. The experimental data have been treated graphically and numerically by means of the Letagrop-Distr program and can be explained by assuming the formation of the chelate PdL2. Values of the extraction constants are also given. |
| Keywords: | Palladium nitric acid β-hydroxyoxime based extractants LIX 84 LIX 860-I |