Extraction of lanthanide(III) nitrates with solutions of trialkylmethylammonium di(2-ethylhexyl) phosphate in toluene

被引：0
|
作者：
Pyartman, AK [1 ]
Kovalev, SV [1 ]
Keskinov, VA [1 ]
机构：
[1] St Petersburg State Technol Inst, St Petersburg, Russia
来源：
RUSSIAN JOURNAL OF APPLIED CHEMISTRY | 1998年 / 71卷 / 05期
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D O I：
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中图分类号：
O69 [应用化学];
学科分类号：
081704 ;
摘要：
A study was made of extraction of lanthanide(III) (from lanthanum to holmium) nitrates by solutions of trialkylmethylammonium di(2-ethylhexyl) phosphate in toluene at T = 298.15 K and pH 2. The extraction isotherms were analyzed assuming formation of two different extraction complexes (R4N)(3)[Ln(NO3)(3)A(3)] and (R4N)(2)[Ln(NO3)(3)A(2)] in the organic phase. The extraction constants calculated from the experimental results increase in passing from lanthanum to europium and then decrease to holmium.
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页码：786 / 789
页数：4
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