Improving the selective extraction of lanthanides by using functionalised ionic liquids

被引：39
|
作者：
Maria, Leonor [1 ,2 ]
Cruz, Adelaide [1 ,2 ]
Carretas, Jose M. [1 ,2 ]
Monteiro, Bernardo [1 ,2 ]
Galinha, Catarina [1 ]
Gomes, Susana S. [1 ]
Fatima Araujo, M. [1 ]
Paiva, Isabel [1 ]
Marcalo, Joaquim [1 ,2 ]
Leal, Joao P. [1 ,2 ]
机构：
[1] Univ Lisbon, Inst Super Tecn, Ctr Ciencias & Tecnol Nucl C2TN, P-2695066 Bobadela, Portugal
[2] Univ Lisbon, Inst Super Tecn, CQE, P-2695066 Bobadela, Portugal
来源：
SEPARATION AND PURIFICATION TECHNOLOGY | 2020年 / 237卷
关键词：
RARE-EARTH IONS; SOLVENT-EXTRACTION; SYNERGISTIC EXTRACTION; NDFEB MAGNETS; SEPARATION; RECOVERY; METALS; SYSTEM; NEODYMIUM(III); STRATEGY;
D O I：
10.1016/j.seppur.2019.116354
中图分类号：
TQ [化学工业];
学科分类号：
0817 ;
摘要：
Four ionic liquids, tetraoctylammonium oleate - [N-8888] [OL], 1-butyl-3-methylimidazolium-di(2-ethylhexyp-oxamate - [C(4)mim] [DEHOX], tetraoctylammonium dioctyl-diglycolamate - [N-8888] [DODGA] and tetraoctylammonium di(2-ethylhexyl)-oxamate - [N-8888] [DEHOX]), were studied concerning the extraction and selective separation of lanthanides from aqueous solutions. The influence of several factors (pH, time of contact between phases, ionic strength, ionic liquid to metal ratio) were analysed. Also, back-extraction and re-use of the ionic liquids were addressed. From all the obtained results, it should be stressed that the separation achieved along the lanthanide series by the use of [N-8888] [DEHOX] was significant, with an increasing separation factor along the series and close to 80 for Yb/Ce.
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页数：8
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