Group Extraction of the Rare-Earth Elements by Alkyl Phosphine Oxides of the Hexyl-Octyl Series

被引：0

作者：

Tumanov, V. V. ^{[1
]}

Storozhenko, P. A. ^{[2
]}

Grachev, A. A. ^{[2
]}

Fedin, O. I. ^{[1
]}

机构：

[1] Luch Res & Prod Assoc, Podolsk 142100, Moscow Oblast, Russia

[2] State Res Inst Chem & Technol Organoelement Cpds, Moscow 105118, Russia

来源：

RUSSIAN JOURNAL OF INORGANIC CHEMISTRY | 2023年 / 68卷 / 04期

关键词：

neutral extractants; lanthanides; liquid-liquid extraction; nitric acid; separation factors; SOLVENT-EXTRACTION; ACID;

D O I：

10.1134/S0036023622602902

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

Samples of monoalkyl and mixed-alkyl phosphine oxides of the hexyl-octyl series were synthesized previously by the Grignard method. Here, the group extraction of rare-earth metals contained simultaneously in their nitrate solutions has been studied using then-synthesized alkyl phosphine oxides. Extraction isotherms for the recovery of the total of lanthanides, scandium, and thorium from nitrate solutions have been obtained. Trihexyl phosphine oxide (THPO) exhibits the highest efficiency under these conditions. Trioctyl phosphine oxide (TOPO) exhibits the best selectivity to heavy-group lanthanides, which makes it useful for the recovery of the heavy-group lanthanide fraction. In addition, scandium and thorium were extracted completely, which in turn indicates the usefulness of phosphine oxides for their extraction. The separation factors have been determined for the entire lanthanides series.

引用

页码：474 / 478

页数：5

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