Interfacial activity and rate of palladium(II) extraction with decyl pyridine monocarboxylates |
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Authors: | Maciej Winiewski Artur Jakubiak Jan Szymanowski |
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Affiliation: | Maciej Wi?niewski,Artur Jakubiak,Jan Szymanowski |
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Abstract: | Decyl isonicotiniate and decyl nicotiniate permit a rapid extraction of palladium(II) from its hydrochloride solutions. Decyl picoliniate is not a suitable extractant. 4-Octylphenylamine can act as a phase transfer catalyst when its concentration in the organic phase is at least 2·5 × 10?4 M . It seems that the interfacial adsorption of pyridine carboxylates and of 4-octylphenylamine is not the decisive phenomenon in palladium(II) extraction. The negligible protonation of the pyridine-type extractants and the phase transfer catalysis explains well the quick extraction of palladium(II) with the commercial and highly hydrophobic extractant ACORGA CLX-50. |
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Keywords: | palladium(II) extraction decyl pyridine monocarboxylates 4-octylphenylamine ACORGA CLX-50 kinetics surface activity |
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