Analytical Sciences
Online ISSN : 1348-2246
Print ISSN : 0910-6340
ISSN-L : 0910-6340
SOLVENT EXTRACTION OF SCANDIUM(III), YTTRIUM(III) AND SOME LANTHANOID(III) IONS WITH N-ALKYLCARBONYL SUBSTITUTED N-PHENYLHYDROXYLAMINES
KENSAKU HARAGUCHITOSHIO OGATAKOICHI NAKAGAWAMANABU OKUYAMATOHRU SAITOHTAMIO KAMIDATEHIROTO WATANABE
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1991 Volume 7 Issue Supple Pages 35-38

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Abstract

The extraction behavior of scandium (III), yttrium (III) and certain lanthanoid (III) ions, namely praseodymium, europium and ytterbium, from aqueous solutions into carbon tetrachloride solutions containing various N-alkylcarbonyl-N-phenylhydroxylamines(R-PHAs) has been studied at 298K and the ionic strength, 0.1(NaNO3) The chelating extractants studied were N-octanoyl-N-phenylhydroxylamine (C8-PHA), N-(2-propylpentanoyl)-N-phenylhydroxylamine(PP-PHA) and N-(2-hexyldecanoyl)-N-phenylhydroxylamine(HD-PHA). The metal ions studied were all extracted with all the R-PHAs as self-adducts of the form ML3(HL)2, where L and HL represent the ligand anion and neutral ligand, respectively The extraction constants and separation factors for the extraction systems were evaluated. HD-PHA and PP-PHA were excellent extractants for the separation of yttrium from heavy lanthanoids.

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