Liquid-liquid equilibria of aqueous biphasic systems containing 1-alkyl-3-methylimidazolium amino acid ionic liquids with different anions (L-Leucine, L-Valine, L-Lysine) and inorganic salt (tripotassium phosphate, potassium carbonate)

Korchak, Petr A.; Alopina, Elena V.; Pukinsky, Igor B.; Сафонова, Е. А.

doi:10.1016/j.fluid.2020.112789

Cited by 10 publications

(16 citation statements)

References 40 publications

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“…In this work, liquid–liquid equilibrium (LLE) has been studied for eight systems containing 1-alkyl-3-methylimidazolium halides ([C 4 mim]Br, [C 4 mim]Cl, [C 6 mim]Br, [C 6 mim]Cl, [C 8 mim]Br, [C 8 mim]Cl), and phosphate salt (K 2 HPO 4 or K 3 PO 4 ). The results for four more systems of the same type are presented in our previous work . The binodal data (Tables S2–S9, SI) agree with available literature data ,,− but cover a broader concentration range (Figures S2–S9, SI).…”

Section: Resultssupporting

confidence: 84%

“…To determine the equilibrium phase compositions of the ABSs, we applied the method from our previous paper . For each ABS, four tie lines (TLs) were selected.…”

Section: Methodsmentioning

confidence: 99%

“…To determine the equilibrium phase compositions of the ABSs, we applied the method from our previous paper. 38 For each ABS, four tie lines (TLs) were selected. The weighed amounts of IL, inorganic salt, water, and L-tryptophan were mixed in a vessel equipped with a stirring bar.…”

Section: Methodsmentioning

confidence: 99%

“…For IL−salt−water ABSs, the absence of any significant cross ion exchange was shown by Bridges et al 39 and Zafarani-Moattar et al 40 and confirmed in our previous paper. 38 Thus, the binodal equation (eq 1) represents correctly the concentration of ions for all TLs and can be used to determine the compositions of the equilibrium phases.…”

Section: Methodsmentioning

confidence: 99%

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Partitioning of l-Tryptophan in Aqueous Biphasic Systems Containing an Alkylimidazolium Ionic Liquid and a Phosphate Salt

Korchak

Сафонова

Victorov

2021

Ind. Eng. Chem. Res.

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For the development of novel liquid extraction systems, systematic experimental data and methods of predicting liquid−liquid equilibria are required. In this work, we report experimental data for a family of aqueous biphasic systems (ABSs) containing 1-butyl-3-methylimidazolium bromide/chloride, 1hexyl-3-methylimidazolium bromide/chloride, and 1-methyl-3octylimidazolium bromide/chloride in the presence of an inorganic salt (K 2 HPO 4 or K 3 PO 4 ) and assess the predictive capabilities of the ePC-SAFT equation of state in its classical form. The experimental binodal data for eight ABSs have been obtained in a broad concentration range. Although the ePC-SAFT gives a good description of the properties of binary systems, the deviations between experimental and predicted tie lines for the ternary ABSs are significant and the predictions are not quantitative. Improvement in the electrostatic term of the model is required for better performance. We systematically study the partitioning of L-tryptophan, taken as a model solute, and discuss the effect of the alkyl chain length of the imidazolium cation [C n mim] + and the specific effect of the anion of ionic liquids (ILs) (chloride versus bromide). We show that the alkyl chain length of [C n mim] + has almost no effect on the partition coefficients of L-tryptophan (K Trp ) in the ABSs with K 3 PO 4 , while lower K Trp values are found for ILs with the [C 4 mim] + cation for the ABSs with K 2 HPO 4 . A substantial specific effect of the anion of ILs is only observed when the salting-out effect of the inorganic salt is most pronounced, i.e., in the case of the ABSs with K 3 PO 4 . It should be specially mentioned that K Trp values are higher for the ABSs studied in this work in comparison with the available literature data for other IL−salt−water ABSs. This fact implies that the investigated ABSs have high potential for the extraction of biocomponents.

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Section: Resultssupporting

confidence: 84%

“…To determine the equilibrium phase compositions of the ABSs, we applied the method from our previous paper . For each ABS, four tie lines (TLs) were selected.…”

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

See 2 more Smart Citations

Partitioning of l-Tryptophan in Aqueous Biphasic Systems Containing an Alkylimidazolium Ionic Liquid and a Phosphate Salt

Korchak

Сафонова

Victorov

2021

Ind. Eng. Chem. Res.

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“…Therefore, the separation of ionic liquids and volatile organic compounds can use evaporation instead of distillation, which can significantly save energy consumption. For this reason, to separate volatile organic compounds from aqueous solutions, ionic liquids are employed to extract the organic compounds from aqueous solutions and then evaporate the mixture to obtain the organic compounds by some researchers. − Fernandes and co-workers reported that [PF 6 ] − would undergo hydrolysis at high temperatures (70 and 100 °C) or in acidic conditions (pH = 3). The pH value of the 1-methylimidazole aqueous solution is 9.5–10.5 (50 g/L, H 2 O, 20 °C), the temperature of our experiment is low, and the hydrolysis degree of the ionic liquid is very limited.…”

Section: Introductionmentioning

confidence: 99%

Measurement and Correlation of Liquid–Liquid Equilibria of Water (1) + 1-Methylimidazole (2) + [Bmim][PF₆] (3) Ternary Systems between 303.15 and 323.15 K

2021

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To obtain the basic data for the recovery of 1-methylimidazole from wastewater by extraction, the ternary liquid−liquid phase equilibrium data of the water (1) + 1-methylimidazole (2) + 1-butyl-3-methylimidazolium hexafluorophosphate ([Bmim][PF 6 ]) (3) system were determined using an equilibrium autoclave at the temperatures of 303.15 to 323.15 K and 101.32 kPa. The solute distribution coefficient (D) and the selectivity (S) of the ternary system were calculated in accordance with the experimental data. Their values were up to 1.39 and 41.17, respectively, which showed that the ionic liquid can extract 1-methylimidazole effectively. The experimental results showed that the temperature had a slight effect on the liquid−liquid equilibrium behavior. Meanwhile, the calculated results revealed that the selectivity coefficient decreased with the enhancing concentration of 1-methylimidazole in the ternary system and the increasing temperature. In addition, the nonrandom two liquid (NRTL) model was used for correlation of the ternary systems. The root-mean-square deviation value of 0.0218 indicated that the calculated results using the model were in good agreement with the experimental data and were reliable to apply to practice.

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Quadratic Modeling and Optimization of Quaternary Equilibria of Liquid–Liquid Systems of General Types, Reactive Extraction Mixtures and Aqueous Biphasic Systems

Şenol

2022

J Solution Chem

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Liquid-liquid equilibria of aqueous biphasic systems containing 1-alkyl-3-methylimidazolium amino acid ionic liquids with different anions (L-Leucine, L-Valine, L-Lysine) and inorganic salt (tripotassium phosphate, potassium carbonate)

Cited by 10 publications

References 40 publications

Partitioning of l-Tryptophan in Aqueous Biphasic Systems Containing an Alkylimidazolium Ionic Liquid and a Phosphate Salt

Partitioning of l-Tryptophan in Aqueous Biphasic Systems Containing an Alkylimidazolium Ionic Liquid and a Phosphate Salt

Measurement and Correlation of Liquid–Liquid Equilibria of Water (1) + 1-Methylimidazole (2) + [Bmim][PF₆] (3) Ternary Systems between 303.15 and 323.15 K

Quadratic Modeling and Optimization of Quaternary Equilibria of Liquid–Liquid Systems of General Types, Reactive Extraction Mixtures and Aqueous Biphasic Systems

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Liquid-liquid equilibria of aqueous biphasic systems containing 1-alkyl-3-methylimidazolium amino acid ionic liquids with different anions (L-Leucine, L-Valine, L-Lysine) and inorganic salt (tripotassium phosphate, potassium carbonate)

Cited by 10 publications

References 40 publications

Partitioning of l-Tryptophan in Aqueous Biphasic Systems Containing an Alkylimidazolium Ionic Liquid and a Phosphate Salt

Partitioning of l-Tryptophan in Aqueous Biphasic Systems Containing an Alkylimidazolium Ionic Liquid and a Phosphate Salt

Measurement and Correlation of Liquid–Liquid Equilibria of Water (1) + 1-Methylimidazole (2) + [Bmim][PF6] (3) Ternary Systems between 303.15 and 323.15 K

Quadratic Modeling and Optimization of Quaternary Equilibria of Liquid–Liquid Systems of General Types, Reactive Extraction Mixtures and Aqueous Biphasic Systems

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Measurement and Correlation of Liquid–Liquid Equilibria of Water (1) + 1-Methylimidazole (2) + [Bmim][PF₆] (3) Ternary Systems between 303.15 and 323.15 K