Extraction and separation of rare earth metal ions with DODGAA in ionic liquids
Extraction and separation of rare earth metal ions with DODGAA in ionic liquids
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DOI：
10.15261/serdj.19.69
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发表时间：
2012
影响因子：
0.7
通讯作者：
Fan Yang;Yuzo Baba;Fukiko Kubota;N. Kamiya;M. Goto
中科院分区：
文献类型：
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作者：
Fan Yang;Yuzo Baba;Fukiko Kubota;N. Kamiya;M. Goto
为了将离子液体应用于稀土金属的分离，以1-辛基-3-甲基咪唑双（三氟甲基磺酰基）酰亚胺[C8 mim][Tf 2N]为萃取剂，N，N-二辛基二甘醇酰胺酸（DODGAA）为萃取剂，研究了离子液体对一系列稀土元素的液-液萃取行为。在正十二烷体系中，重稀土元素具有较高的选择性，而在IL体系中，重稀土元素中Y（III）的萃取率顺序介于Tb和Dy之间。该位置与使用有机磷萃取剂如双（2-乙基己基）磷酸（D2 EHPA）和2-乙基己基膦酸单-2-乙基己基酯（PC-88 A）的普通溶剂萃取系统的位置略有不同。从pH 1.5到4的硫酸溶液中，用DODGAA实现了所有稀土金属的定量萃取。证实了离子液体中稀土金属离子被3个DODGAA分子萃取。
In order to apply ionic liquids (ILs) to the separation of rare earth metals, liquid-liquid extraction of a series of rare earth elements into the ILs was investigated mainly using 1-octyl-3-methylimidazolium bis(trifluoromethyl sulfonyl) imide, [C8mim][Tf2N], with N,N-dioctyldiglycol amic acid (DODGAA) as the extractant. A higher selectivity was exhibited for the heavier rare earth elements as in the n-dodecane system, and the order of the extractability of Y(III) in the IL system, situated in the heavy rare earth metals, was between Tb and Dy. This position is a little different from that for the common solvent extraction system employing organophosphorus extractants such as bis (2-ethylhexyl)phosphoric acid (D2EHPA) and 2-ethylhexylphosphonic acid mono-2-ethylhexyl ester (PC-88A). Quantitative extraction was achieved for all rare earth metals with DODGAA from sulfuric acid solutions from pH 1.5 to 4. It was confirmed that rare earth metal ions were extracted with 3 DODGAA molecules in the ILs.