Synergistic extraction study of samarium(III) from chloride medium by mixtures of bis(2,4,4-trimethylpentyl)phosphinic acid and 8-hydroxyquinoline

被引：27
作者：
Wang, Xianglan [1 ]
Du, Mo [1 ]
Liu, Hui [1 ]
机构：
[1] Wuhan Bioengn Inst, Dept Chem & Environm Engn, Wuhan 430415, Peoples R China
来源：
SEPARATION AND PURIFICATION TECHNOLOGY | 2012年 / 93卷
关键词：
Synergistic extraction; Samarium; Cyanex272; 8-Hydroxyquinoline; SOLVENT-EXTRACTION; RARE-EARTHS; MONO-2-ETHYLHEXYL ESTER; LANTHANIDE METALS; PHOSPHINIC ACID; ACETIC-ACID; SEPARATION; LANTHANUM(III); HEPTANE;
D O I：
10.1016/j.seppur.2012.03.002
中图分类号：
TQ [化学工业];
学科分类号：
0817 ;
摘要：
The extraction behavior of samarium(III) with mixtures of bis(2,4,4-trimethylpentyl) phosphinic acid (Cyanex272, H(2)A(2)) and 8-hydroxyquinoline (HQ) in heptane has been investigated from chloride medium. The mixtures are proved to have higher selectivity when applied to the extraction of the samarium compared with single extractant, the largest synergistic enhancement factor can be calculated to be 233 at pH 4.0. The results show that Sm3+ is extracted into heptane as Sm(OH)(2)Q(HA)(2(o)) or Sm(OH)(2)Q(HQ)(4)-(HA)(2(o)) with synergistic mixture. The equilibrium constants have been determined. The result shows that the synergistic extraction system not only shows perfect capacity of synergistic extraction, but also overcomes emulsification of 8-hydroxyquinoline. (C) 2012 Elsevier B.V. All rights reserved.
引用
收藏
页码：48 / 51
页数：4
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