Extraction mechanism of Sc(III) and separation from Th(IV), Fe(III) and Lu(III) with bis(2,4,4-trimethylpentyl)phosphinic acid in n-hexane from sulphuric acid solutions

Journal Article · Wed Jun 01 04:00:00 EDT 1994 · Solvent Extraction and Ion Exchange; (United States)

DOI:https://doi.org/10.1080/07366299408918228· OSTI ID:7166284

Wang, Chun; Li, Deqian ^[1]

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1. Changchun Inst. of Applied Chemistry and Physics (China)

The extraction equilibrium data of sulphuric acid and scandium(III) with bis(2,4,4-trimethylpentyl)phosphinic acid (H[BTMPP]) from sulphuric acid solutions have been obtained. There are two extraction mechanisms of scandium(III) with H[BTMPP] at different ranges of aqueous acidity. The extraction of Sc(III) proceeds according to a cation exchange reaction at lower aqueous acidity and to a solvating reaction at higher acidity. The practicability of separating Sc(III) from Th(IV),Fe(III) and Lu(III) by controlling the aqueous acidity was discussed. The effect of temperature on extraction of Sc(III) was observed and thermodynamic functions were calculated. IR and NMR spectra were made for organic extracts. The extraction characteristics of H[BTMPP] and di(2-ethylhexyl)phosphinic acid (H[DEHP]) were contrasted to obtain more information about extraction with H[BTMPP]. 12 refs., 6 figs., 1 tab.

• OSTI ID: 7166284
• Journal Information: Solvent Extraction and Ion Exchange; (United States), Journal Name: Solvent Extraction and Ion Exchange; (United States) Vol. 12:3; ISSN 0736-6299; ISSN SEIEDB
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
38 RADIATION CHEMISTRY, RADIOCHEMISTRY, AND NUCLEAR CHEMISTRY
400102 -- Chemical & Spectral Procedures
400105* -- Separation Procedures
400702 -- Radiochemistry & Nuclear Chemistry-- Properties of Radioactive Materials
ALKANES
AQUEOUS SOLUTIONS
CHARGED PARTICLES
DISPERSIONS
EXTRACTION
HEXANE
HYDROCARBONS
HYDROGEN COMPOUNDS
INFRARED SPECTRA
INORGANIC ACIDS
IONS
IRON IONS
LUTETIUM IONS
MAGNETIC RESONANCE
MIXTURES
NUCLEAR MAGNETIC RESONANCE
ORGANIC ACIDS
ORGANIC COMPOUNDS
ORGANIC PHOSPHORUS COMPOUNDS
PH VALUE
PHOSPHINIC ACIDS
RESONANCE
SCANDIUM IONS
SEPARATION PROCESSES
SOLUTIONS
SOLVENT EXTRACTION
SPECTRA
SULFURIC ACID
TEMPERATURE DEPENDENCE
THERMODYNAMICS
THORIUM IONS