Orthogonal array design for the optimization of stripping Sr(Ⅱ) from ionic liquids using supercritical CO2

被引：0
|
作者：
Tao Yang [1 ]
Jing Fu [1 ]
Qingde Chen [1 ]
Xinghai Shen [1 ]
机构：
[1] Beijing National Laboratory for Molecular Sciences (BNLMS),Fundamental Science on Radiochemistry and Radiation Chemistry Laboratory,College of Chemistry and Molecular Engineering,Peking University
来源：
ChineseJournalofChemicalEngineering | 2017年 / 25卷 / 01期
基金：
中国国家自然科学基金;
关键词：
Supercritical CO2 stripping; Ionic liquid; Strontium; Orthogonal array design;
D O I：
暂无
中图分类号：
TL24 [乏燃料后处理]; O658.2 [萃取法];
学科分类号：
070302 ; 0805 ; 081704 ; 082702 ;
摘要：
The strontium ions extracted from the aqueous phase into 1-ethyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide(CmimNTf2) with dicyclohexyl-18-crown-6(DCH18C6) was stripped effectively by supercritical CO(sc-CO).Hexafluoroacetylacetone(HFAA)-acetonitrile was found to be an excellent modifier of sc-COto enhance the stripping efficiency.In the orthogonal array design(OAD),OA(5~5)matrix was employed to optimize the stripping of Sr(Ⅱ) from the DCH 18C6-CmimNTfsystem.Effects of five experimental factors:temperature,pressure,concentration of HFAA,static and dynamic extraction times as well as each factor at five-levels on the stripping of Sr(Ⅱ) were optimized.The effects of these parameters were treated by the analysis of variance(ANOVA).The results showed that Sr(II) could be nearly 100%extracted from the IL phase at 308 K,30 MPa,40 min of dynamic extraction and 60 mmol·LHFAA in acetonitrile,respectively.Finally,the stripping mechanism was studied by ESI-MS.
引用
收藏
页码：26 / 31
页数：6
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