Application of Ionic Liquids to Extraction Separation of Rare Earth Metals with an Effective Diglycol Amic Acid Extractant
Application of Ionic Liquids to Extraction Separation of Rare Earth Metals with an Effective Diglycol Amic Acid Extractant
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DOI：
10.1252/jcej.11we005
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发表时间：
2011-05
影响因子：
0.8
通讯作者：
Fukiko Kubota;Yousuke Shimobori;Yuzo Baba;Y. Koyanagi;K. Shimojo;N. Kamiya;M. Goto
中科院分区：
文献类型：
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作者：
Fukiko Kubota;Yousuke Shimobori;Yuzo Baba;Y. Koyanagi;K. Shimojo;N. Kamiya;M. Goto
液-液萃取在工业和分析领域被广泛应用于金属离子的分离和提纯。然而，在传统的溶剂萃取中，通常使用有毒和/或挥发性稀释剂。近年来，废旧电视显示器、荧光灯、电池和手机等工业废料和废品已成为稀有金属的宝贵二次资源。因此，需要一种从这种潜在的复杂混合物中回收这些金属的高效分离技术(Nakamura等人，2007年；Kubota等人，2009年；Li等人，2009年；Pranolo等人，2010年)。作为传统有机溶剂替代品的室温离子液体最近受到越来越多的关注(Huddleston等人，2001；Anderson等人，2002；Rogers和Seddon等人，2002；赵等人，2005；Kubota和Goto，2006；Plechkova和Seddon，2008；Liu等人，2009；Sun和Armstrong，2010)。ILS是通常由有机阳离子和各种阴离子组成的熔融盐，具有热稳定性高、蒸汽压可忽略不计和不可燃性等独特性质，因此被认为是环保溶剂。它们最大的吸引力在于，它们的物理化学性质，如极性、粘度、密度和与其他溶剂的亲和力，可以通过改变阳离子和阴离子伙伴的组合来广泛地调节(Huddleston等人，2001；Anderson等人，2002)。不溶于水的离子液体作为分离介质在分离和分析化学中有多种潜在的应用(赵等人，2005；久保田和后藤，2006；Liu等人，2009；Sun和Armstrong，2010)。自从Dai等人。(1999)首次报道使用离子液体作为金属离子的萃取稀释剂，大大提高了金属离子的萃取效率，基于离子液体的金属离子萃取体系已被使用几种传统的商业萃取剂进行了深入研究。在咪唑类离子液体中使用二环己基-18-冠-6(DC18C6)作为萃取剂，与传统的有机溶剂体系相比，大大提高了锶的萃取效率。离子液体强化二甘醇-氨基酸萃取剂萃取分离稀土金属
Liquid–liquid extraction is now widely used in industrial and analytical fields for the separation and purification of metal ions. However, in conventional solvent extraction, toxic and/or volatile diluents are commonly employed. In recent years, industrial wastes and scrap such as spent TV displays, fluorescent lamps, batteries, and cellular phones have been highlighted as valuable secondary resources of rare metals. Therefore a highly efficient separation technique for the recovery of these metals from such potentially complex mixtures is required (Nakamura et al., 2007; Kubota et al., 2009; Li et al., 2009; Pranolo et al., 2010). Growing attention has recently focused on room temperature ionic liquids (ILs) as alternatives to conventional organic solvents (Huddleston et al., 2001; Anderson et al., 2002; Rogers and Seddon, 2002; Zhao et al., 2005; Kubota and Goto, 2006; Plechkova and Seddon, 2008; Liu et al., 2009; Sun and Armstrong, 2010). ILs, which are molten salts generally composed of organic cations and various anions, have unique properties such as high thermal stability, negligible vapor pressure, and nonflammability, and are thus regarded as eco-friendly solvents. Their greatest appeal is that their physicochemical properties such as polarity, viscosity, density, and affinity with other solvents are extensively tunable by varying the combination of cationic and anionic partners (Huddleston et al., 2001; Anderson et al., 2002). Water immiscible ILs have a variety of potential applications in separation and analytical chemistry as separation media (Zhao et al., 2005; Kubota and Goto, 2006; Liu et al., 2009; Sun and Armstrong, 2010). Since Dai et al. (1999) first reported that the use of ILs as extraction diluents for metal ions offered significant improvements in extraction efficiency, IL-based extraction systems for metal ions have been intensively investigated using several conventional commercial extractants. The use of dicyclohexano-18-crown-6 (DC18C6) as an extractant in imidazolium-based ILs significantly improves the extraction efficiency for Sr compared to that the use in a traditional organic solvent system. Enhancement Application of Ionic Liquids to Extraction Separation of Rare Earth Metals with an Effective Diglycol Amic Acid Extractant