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

作     者：Tao Yang Jing Fu Qingde Chen Xinghai Shen 

作者机构：Beijing National Laboratory for Molecular Sciences ( BNLMS) Fundamental Science on Radiochemisrry and Radiation Chemistry Laboratory College of Chemistry and Molecular EngineeringPeking University Beijing 100871 China 

出 版 物：《Chinese Journal of Chemical Engineering》 (中国化学工程学报（英文版）)

年 卷 期：2017年第25卷第1期

页      面：26-31页

核心收录：

学科分类：081704[工学-应用化学] 07[理学] 08[工学] 0817[工学-化学工程与技术] 082702[工学-核燃料循环与材料] 070302[理学-分析化学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0827[工学-核科学与技术] 0703[理学-化学] 

基　　金：Supported by the National Natural Science Foundation of China(91226112) 

主　　题：Supercritical CO2 stripping Ionic liquid Strontium Orthogonal array design 

摘      要：The strontium ions extracted from the aqueous phase into 1-ethyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide(C_2mimNTf2) with dicyclohexyl-18-crown-6(DCH18C6) was stripped effectively by supercritical CO_2(sc-CO_2).Hexafluoroacetylacetone(HFAA)-acetonitrile was found to be an excellent modifier of sc-CO_2 to enhance the stripping *** the orthogonal array design(OAD),OA_(25)(5~5)matrix was employed to optimize the stripping of Sr(Ⅱ) from the DCH 18C6-C_2mimNTf_2 *** 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 *** 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·L^(-1) HFAA in acetonitrile,***,the stripping mechanism was studied by ESI-MS.