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

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• 作者：Xianglan Wang ; ^{xlwang1977@yahoo.com.cn} ; Mo Du ; Hui Liu
• 关键词：Synergistic extraction ; Samarium ; Cyanex272 ; 8-Hydroxyquinoline
• 刊名：Separation and Purification Technology
• 出版年：2012
• 期刊代码：78_13835866
• 类别：ce
• 出版时间：1 June, 2012
• 卷：93
• 期：Complete
• 页码：48-51
• 文件大小：308 K

摘要

The extraction behavior of samarium(III) with mixtures of bis(2,4,4-trimethylpentyl) phosphinic acid (Cyanex272, H₂A₂) 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)₂Q(HA)_2(o) or Sm(OH)₂Q(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.