Orthogonal array design for the optimization of stripping Sr(II) from ionic liquids using supercritical CO<sub>2</sub>

Tao Yang; Jing Fu; Qingde Chen; Xinghai Shen

doi:10.1016/j.cjche.2016.05.005

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

Separation Science and Engineering | Updated：2026-01-06

- Orthogonal array design for the optimization of stripping Sr(II) from ionic liquids using supercritical CO₂
- Chinese Journal of Chemical Engineering Vol. 25, Issue 1, Pages: 26-31(2017)
- Affiliations：
  
  1. Beijing National Laboratory for Molecular Sciences(BNLMS), Fundamental Science on Radiochemistry and Radiation Chemistry Laboratory, College of Chemistry and Molecular Engineering
  2. Peking University,Beijing,China,100871
- Author bio：
- Funds：
- DOI：10.1016/j.cjche.2016.05.005
  CLC：
- Published：2017
- Accepted：
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[J]. , 2017, 25(1): 26-31.
DOI：

[J]. , 2017, 25(1): 26-31. DOI： 10.1016/j.cjche.2016.05.005.

摘要

Abstract

The strontium ions extracted from the aqueous phase into 1-ethyl-3-methylimidazolium bis(trifluoromethylsulfonyl) imide (C

mimNTf

) 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-CO

to enhance the stripping efficiency. In the orthogonal array design (OAD)

) matrix was employed to optimize the stripping of Sr(II) from the DCH18C6-C

mimNTf

system. 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·L

-1

HFAA in acetonitrile

respectively. Finally

the stripping mechanism was studied by ESI-MS.

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⁰

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

DOI：10.1016/j.cjche.2016.05.005

摘要

Abstract

关键词

Keywords

references

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