EXTRACTION SEPARATION OF RARE-EARTH ELEMENTS BY AMINES IN THE PRESENCE OF COMPLEXING AGENTS .1. SEPARATION OF LA AND SM IN THE PRESENCE OF 2-HYDROXYETHYLETHYLENEDIAMINETRIACETIC ACID

被引：6

作者：

KOVALANCIK, J ^{[1
]}

GALOVA, M ^{[1
]}

机构：

[1] TECH UNIV KOSICE, FAC MET, DEPT CHEM, CS-04385 KOSICE, CZECHOSLOVAKIA

来源：

JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY-ARTICLES | 1992年 / 162卷 / 01期

关键词：

D O I：

10.1007/BF02039922

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

The extraction separation of La and Sm by benzyldibutylamine (BDBA) from an aqueous solution containing 6 mol.dm-3 NaNO3 and 0.5 mol.dm-3 HNO3 is not very efficient. It may remarkably be improved by addition of a complexing agent. 2-hydroxyethylethylenediaminetriacetic acid (HEDTA). The effect of preferential La extraction into the organic phase together with the effect of preferential complexation of Sm in the aqueous phase may lead, by proper choice of the complexing agent concentration, to a 7-10 fold increase in alpha(La/Sm) values. The procedure described here enables fairly good separation of a major from minor elements.

引用

页码：35 / 46

页数：12

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