Carbonate extraction-based refining of uranium. Separation of U(VI), Ce(IV), and Ln(III) from aqueous carbonate solutions with methyltrioctylammonium carbonate

被引：4

作者：

Boyarintsev, A. V. ^{[1
]}

Abashev, L. M. ^{[1
]}

Stepanov, S. I. ^{[1
]}

Zhilov, V. I. ^{[1
]}

Chekmarev, A. M. ^{[1
]}

Tsivadze, A. Yu. ^{[2
]}

机构：

[1] Mendeleev Univ Chem Technol, Moscow 125190, Russia

[2] Russian Acad Sci, Frumkin Inst Phys Chem & Electrochem, Moscow 117071, Russia

来源：

DOKLADY CHEMISTRY | 2017年 / 473卷

基金：

俄罗斯科学基金会;

关键词：

D O I：

10.1134/S0012500817040024

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The extraction of U(VI), Ce(IV), La(III), Nd(III), Sm(III), and Y(III) from an aqueous solution of Na2CO3 (0.25 mol/L) resulting from oxidative dissolution of U(IV) in the presence of H2O2 into a solution of methyltrioctylammonium carbonate (0.25 mol/L) in toluene. It was found that beta(U(VI)/Ln(III)) values vary from similar to 8 to 3290 as the O : W ratio changes from 2 : 1 to 10 : 1, while beta(U(VI)/Ce(IV)) varies from similar to 1.5 to 10, which allows for the extraction separation of U(VI) from Ce(IV) in a 8- to 10-stage counter-current extraction cascade and from Ln(III) in 2- to 3-stage cascade under the same conditions.

引用

页码：70 / 73

页数：4

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