Liquid鈥揕iquid Equilibria of the Aqueous Two-Phase Systems of Ionic Liquid 1-Butyl-3-methylimidazolium Tetrafluoroborate and Sodium Dihydrogen Phosphate/Disodium Hydrogen Phosphate or Their Mixtures
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- 作者：Hekun Lv ; Zhenxi Jiang ; Yanhong Li ; Baozeng Ren
- 刊名：Journal of Chemical & Engineering Data
- 出版年：2012
- 出版时间：September 13, 2012
- 年：2012
- 卷：57
- 期：9
- 页码：2379-2386
- 全文大小：321K
- 年卷期：v.57,no.9(September 13, 2012)
- ISSN：1520-5134
文摘
Liquid鈥搇iquid equilibria of the aqueous two-phase systems of the ionic liquid (IL) 1-butyl-3-methylimidazolium tetrafluoroborate and sodium dihydrogen phosphate/disodium hydrogen phosphate or their mixtures have been determined at 298.15 K, 303.15 K, and 308.15 K. The nonlinear equation developed by Merchuk was used to correlate the experimental binodal data. The two-phase regions gradually expand with the increase of the percentage of Na2HPO4 in the salt mixtures. It was also shown that the two-phase region decreases along with the temperature increases. The tie-line data were correlated by Othmer鈥揟obias and Bancraft equations. It was found that these equations fit the experimental data well. The temperature dependence on tie lines has been discussed. The effect of the concentration of the salt mixtures on binodal curves and tie-line data has also been discussed.