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

关键词：

D O I：

暂无

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.

引用

页码：786 / 789

页数：4

共 8 条

[1]

DENNIS JE, 1983, NUMERICAL METHODS UN

[2]

Khol'kin A. I., 1984, KHIMIYA EKSTRAKTSII, P53

[3]

Mikhailichenko A.I., 1987, Rare-Earth Metals

[4]

*OST, 1981, 4820981 OST

[5]

PYARTMAN AK, 1995, ZH PRIKL KHIM, V68, P236

[6] ISOPIESTIC DETERMINATION OF THE ACTIVITY-COEFFICIENTS OF SOME AQUEOUS RARE-EARTH ELECTROLYTE-SOLUTIONS AT 25-DEGREES-C .5. DY(NO3)3, HO(NO3)3, AND LU(NO3)3 [J].

RARD, JA ;

SPEDDING, FH .

JOURNAL OF CHEMICAL AND ENGINEERING DATA, 1981, 26 (04) :391-395

[7] ISOPIESTIC DETERMINATION OF THE ACTIVITY-COEFFICIENTS OF SOME AQUEOUS RARE-EARTH ELECTROLYTE-SOLUTIONS AT 25-DEGREES-C .4. LA(NO3)3, PR(NO3)3, AND ND(NO3)3 [J].

RARD, JA ;

MILLER, DG ;

SPEDDING, FH .

JOURNAL OF CHEMICAL AND ENGINEERING DATA, 1979, 24 (04) :348-354

[8]

RARD JA, 1982, J CHEM ENG DATA, V27, P451

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