Solvent extraction of Sc(III), Zr(IV), Th(IV), Fe(III), and Lu(III) with thiosubstituted organophosphinic acid extractants

Journal Article · Mon May 01 04:00:00 EDT 1995 · Solvent Extraction and Ion Exchange

DOI:https://doi.org/10.1080/07366299508918288· OSTI ID:41847

Wang, C; Li, D ^[1]

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1. Inst. of Applied Chemistry, Changchun (China)

The solvent extraction of Sc(III), Zr(IV), Th(IV), Fe(III) and Lu(III) with Cyanex 302 (bis(2,4,4-trimethylpentyl)monothiphosphinic acid) and Cyanex 301 (bis(2,4,4-trimethylpentyl)dithiophosphinic acid) in n-hexane from acidic aqueous solutions has been investigated systematically. The effect of equilibrium aqueous acidity on the extraction with these reagents was studied. The separation of Th(IV), Fe(III) and Lu(III) from Sc(III), or the separation of other metals from Lu(III) with Cyanex 302, can be achieved by controlling the aqueous acidity. However, Cyanex 301 exhibited a poor selectivity for the above metals, except for Lu(III). The extraction of these metals with Cyanex 272, Cyanex 302 and Cyanex 301 has been compared. The stripping percentages of Sc(III) for Cyanex 302 and Cyanex 301 in a single stage are near 78% and 75% with 3.5 mol/L and 5.8 mol/L sulphuric acid solutions, respectively. The effects of extractant concentration and temperature on the extraction of Sc(III) were investigated. The stoichiometry of the extraction of Sc(III) with Cyanex 302 was determined. The role of different components of Cyanex 302 in the extraction of Sc(III) was discussed. 18 refs., 10 figs.

• Sponsoring Organization: USDOE
• OSTI ID: 41847
• Journal Information: Solvent Extraction and Ion Exchange, Journal Name: Solvent Extraction and Ion Exchange Journal Issue: 3 Vol. 13; ISSN 0736-6299; ISSN SEIEDB
• Country of Publication: United States
• Language: English

Related Subjects

05 NUCLEAR FUELS
40 CHEMISTRY
ABUNDANCE
IRON
LUTETIUM
NMR SPECTRA
ORGANIC SULFUR COMPOUNDS
PHOSPHONIC ACIDS
SCANDIUM
SOLVENT EXTRACTION
TEMPERATURE DEPENDENCE
THORIUM
ZIRCONIUM