期刊
SEPARATION AND PURIFICATION TECHNOLOGY
卷 81, 期 1, 页码 25-30出版社
ELSEVIER
DOI: 10.1016/j.seppur.2011.06.034
关键词
Extraction; Ionic liquid; Rare earth; Sustainability
资金
- National Natural Science Foundation of China [20901073]
- Distinguished Young Scholar Foundation of Jilin Province [20060114]
- SRF for ROCS
- Ministry of Education of China
Ionic liquid (IL)-based extraction is a promising high-efficiency and environmentally benign separation technology. Imidazolium ILs lose their cations or anions to aqueous phase during extraction, the release lead to water pollution. To develop sustainable IL-based extraction system, we firstly investigate quaternary ammonium nitrate IL-based extraction strategy. Alkylated phosphine oxides (Cyanex925) in tricaprylmethylammonium nitrate ([A336][NO3]) are studied for separating Sc from Y and lanthanides. Distribution ratio and separation factor of the Cyanex925-[A336][NO3] system for Sc3+ are by far larger than those achieved using Cyanex925-[C(8)mim][PF6] system. The stability and solvating mechanism of Cyanex925-[A336][NO3] extraction system can avoid release of [A336][NO3] to aqueous phase. The novel quaternary ammonium nitrate IL-based extraction system is an efficient and sustainable separation strategy. Published by Elsevier B.V.
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