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首页> 外文期刊>Separation and Purification Technology >Extraction and third phase formation behavior of Eu(III) IN CMPO-TBP extractants present in room temperature ionic liquid
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Extraction and third phase formation behavior of Eu(III) IN CMPO-TBP extractants present in room temperature ionic liquid

机译：室温离子液体中存在的CMPO-TBP中Eu（III）IN的萃取及其第三相形成行为

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摘要

The extraction behavior of europium(III) from nitric acid medium by a solution of n-octyl(phenyl)-N,N-diisobutylcarbamoylmethylphosphine oxide (CMPO) and tri-n-butylphosphate (TBP) in the room temperature ionic liquid, 1-butyl-3-methylimidazolium bis(trifluoromethanesulfonyl)imide (bmimNTf2), was studied. The distribution ratio (D_(Eu)) of Eu(III) in CMPO-TBP/bmimNTf2 was measured as a function of various parameters such as the concentrations of nitric acid, europium, CMPO, and TBP and temperature. The distribution ratio of europium increases with the increase in the concentration of nitric acid reaches a maximum value around 1M followed by decrease. Loading of europium in CMPO-TBP/bmimNTf2 increases with the increase in Eu(III) concentration without leading to the formation of third phase, which is usually observed in conventional diluents. The stoichiometry of metal-solvate in organic phase varies from 1:3 (Eu:CMPO) at trace levels to 1:1 at higher europium loadings. The viscosity of the TBP-CMPO/bmimNTf2 system at various temperatures and the enthalpy change accompanied by the extraction of europium(III) were determined and reported in this paper.
机译：室温离子液体中的正辛基（苯基）-N，N-二异丁基氨基甲酰基甲基膦氧化物（CMPO）和磷酸三正丁酯（TBP）溶液从硝酸介质中萃取（（III）的行为1-研究了丁基3-甲基咪唑鎓双（三氟甲磺酰基）酰亚胺（bmimNTf2）。测量Eu（III）在CMPO-TBP / bmimNTf2中的分配比率（D_（Eu）），该比率是各种参数（例如硝酸，euro，CMPO和TBP的浓度和温度）的函数。 of的分布比率随着硝酸浓度的增加而增加，在1M附近达到最大值，然后降低。 Eu在CMPO-TBP / bmimNTf2中的负载量随Eu（III）浓度的增加而增加，而不会导致形成第三相，这通常是在常规稀释剂中观察到的。有机相中金属溶剂化物的化学计量比从痕量水平的1：3（Eu：CMPO）到更高的loading负载量为1：1。测定并报道了TBP-CMPO / bmimNTf2体系在不同温度下的粘度以及伴随by（III）萃取的焓变。

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