Solvent Extraction of Yttrium by Task-specific Ionic Liquids Bearing Carboxylic Group

›› 2012, Vol. 20 ›› Issue (1): 40-46.

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Solvent Extraction of Yttrium by Task-specific Ionic Liquids Bearing Carboxylic Group

WANG Wei^1,2, LIU Yu¹, XU Aimei¹, YANG Hualing^1,2, CUI Hongmin^1,2, CHEN Ji¹

1. State Key Laboratory of Rare Earth Resources Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China;
2. Graduate School of the Chinese Academy of Sciences, Beijing 100039, China

Received:2011-08-18 Revised:2011-11-11 Online:2012-05-03 Published:2012-02-28
Supported by:
Supported by the National Basic Research Program of China (2012CBA01202);the National Natural Science Foundation of China (51174184)

Solvent Extraction of Yttrium by Task-specific Ionic Liquids Bearing Carboxylic Group

王威^1,2, 刘郁¹, 徐爱梅¹, 杨华玲^1,2, 崔红敏^1,2, 陈继¹

1. State Key Laboratory of Rare Earth Resources Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China;
2. Graduate School of the Chinese Academy of Sciences, Beijing 100039, China

通讯作者: CHEN Ji,E-mail:jchen@ciac.jl.cn
基金资助:
Supported by the National Basic Research Program of China (2012CBA01202);the National Natural Science Foundation of China (51174184)

Abstract

Abstract: A new kind of hydrophobic ionic liquids [1-alkyl-3-(1-carboxylpropyl)im][PF₆] has been synthesized,and their extraction properties for Y(Ⅲ) in the nitric acid medium was also investigated.The effects of extractant concentration,equilibrium pH of aqueous phase,salt concentration,temperature etc.were discussed.The results show that this kind of Task-Specific Ionic Liquid (TSIL) needs to be saponified before being used for the Y(Ⅲ) extraction,and the extraction is acid dependent,and the extraction efficiency increases with the aqueous phase acidity decreasing.Furthermore,the loaded organic phase is easy to be stripped;more than 95% Y(Ⅲ) could be stripped from the loaded organic phase when the stripping acidity is higher than 0.07 mol·L^-1.The slope analysis technique is used to investigate the extraction mechanism,and a possible cation-exchange extraction mechanism is proposed in the present extraction system.

Key words: task-special ionic liquids, extraction, yttrium, carboxylic acidic

摘要： A new kind of hydrophobic ionic liquids [1-alkyl-3-(1-carboxylpropyl)im][PF₆] has been synthesized,and their extraction properties for Y(Ⅲ) in the nitric acid medium was also investigated.The effects of extractant concentration,equilibrium pH of aqueous phase,salt concentration,temperature etc.were discussed.The results show that this kind of Task-Specific Ionic Liquid (TSIL) needs to be saponified before being used for the Y(Ⅲ) extraction,and the extraction is acid dependent,and the extraction efficiency increases with the aqueous phase acidity decreasing.Furthermore,the loaded organic phase is easy to be stripped;more than 95% Y(Ⅲ) could be stripped from the loaded organic phase when the stripping acidity is higher than 0.07 mol·L^-1.The slope analysis technique is used to investigate the extraction mechanism,and a possible cation-exchange extraction mechanism is proposed in the present extraction system.

关键词: task-special ionic liquids, extraction, yttrium, carboxylic acidic

CLC Number:

TQ028.32

WANG Wei, LIU Yu, XU Aimei, YANG Hualing, CUI Hongmin, CHEN Ji. Solvent Extraction of Yttrium by Task-specific Ionic Liquids Bearing Carboxylic Group[J]. , 2012, 20(1): 40-46.

王威, 刘郁, 徐爱梅, 杨华玲, 崔红敏, 陈继. Solvent Extraction of Yttrium by Task-specific Ionic Liquids Bearing Carboxylic Group[J]. , 2012, 20(1): 40-46.

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Solvent Extraction of Yttrium by Task-specific Ionic Liquids Bearing Carboxylic Group

Solvent Extraction of Yttrium by Task-specific Ionic Liquids Bearing Carboxylic Group

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