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EQUILIBRIUM OF SOLVENT-EXTRACTION OF LANTHANIDE IONS WITH DIDODECYLPHOSPHORIC ACID

被引：7
作者：
KONDO, K
MOMOTA, K
NAKASHIO, F
机构：
[1] Kyushu Univ, Japan
来源：
SOLVENT EXTRACTION AND ION EXCHANGE | 1989年 / 7卷 / 06期
关键词：
Extraction--Phase Equilibria - Phosphoric Acid - Solvents--Selectivity;
D O I：
10.1080/07360298908962352
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
Measurement of the extraction equilibrium of europium by didodecylphosphoric acid dissolved in toluene diluent was carried out at 303 K. From vapor-phase osmometry, it was found that the extractant (HR) is apt to dimerize in toluene diluent. The extraction equilibrium constant of the metal was obtained. The extraction equilibria of three lanthanide ions, that is, samarium, europium and gadolinium by the extractant from mixed solution of the metals were also measured. The extraction equilibrium constants of respective metals were obtained. The separation factor between samarium and europium was found to be improved compared with the extractions by 2-ethylhexylphosphonic acid mono-2-ethylhexyl ester and di(-2-ethylhexyl) phosphoric acid.
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页码：1027 / 1041
页数：15
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