LIQUID-LIQUID-EXTRACTION OF CERIUM(III) AND LANTHANUM(III) FROM AQUEOUS CHLORIDE SOLUTIONS BY SME-529

被引：10

作者：

URBANSKI, TS ^{[1
]}

ABBRUZZESE, C ^{[1
]}

FORNARI, P ^{[1
]}

MASSIDDA, R ^{[1
]}

机构：

[1] CNR,INST MINERAL PROC,I-00138 ROME,ITALY

来源：

HYDROMETALLURGY | 1992年 / 28卷 / 01期

关键词：

D O I：

10.1016/0304-386X(92)90061-4

中图分类号：

TF [冶金工业];

学科分类号：

0806 ;

摘要：

The extraction of cerium (III) and lanthanum (III) from aqueous chloride solutions by SME 529 dissolved in n-heptane was studied as a function of pH, extractant, metal and chloride concentrations. The extraction equilibrium for both lanthanides was found to depend strongly on pH and SME 529 concentration. The calculated extraction constants are: log K(ex) = -16.3 for Ce(III) and log K(ex) = -19.5 for La (III). Large extraction coefficient values can be achieved only at relatively high pH values when partial precipitation of hydroxide occurs. CeR3 and LaR2OH are the main species extracted.

引用

页码：1 / 12

页数：12

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