ABS Composed of Ionic Liquids and Polymers

Sadeghi, Rahmat

doi:10.1007/978-3-662-52875-4_4

Cited by 7 publications

(5 citation statements)

References 33 publications

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“…In these systems, the activity coefficient of solute A in aqueous solution is lowered by the presence of solute B. 38 On the other hand, for A + B + water systems which show the soluting-out effect, because of the unfavorable A−B interactions, the interaction of each solute with water becomes stronger in the presence of another solute, and therefore, in these ternary systems, less free water molecules would be available with respect to the semiideal behavior, and then these systems show negative departures from eqs 4 and 5 (Δa w < 0 and Δπ w < 0). Because of the unfavorable A−B interactions, they exclude themselves from the vicinity of each other due to their preferential hydration.…”

Section: Resultsmentioning

confidence: 99%

Vapor Pressure Osmometry Studies of Aqueous Ionic Liquid–Carbohydrate Systems

Jamehbozorg

Sadeghi

2018

J. Chem. Eng. Data

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Precise vapor pressure osmometry (VPO) measurements at 308.15 K were conducted for solutions of three ILs, 1-butyl-3-methylimidazolium tetrafluoroborate ([Bmim][BF4]), 1-butyl-3-methylimidazolium bromide ([Bmim][Br]), and 1-butyl-3-methylimidazolium hydrogen sulfate ([Bmim][HSO4]), in aqueous solutions of three carbohydrates, sucrose, maltose, and maltitol, as well as for solutions of the carbohydrates in aqueous solutions of these ILs. Because of the unfavorable IL–carbohydrate interactions, all the investigated IL + carbohydrates aqueous systems show the soluting-out effect and vapor–liquid equilibria behavior of these systems in the monophasic region show the negative deviation from the semi-ideal behavior (a w + 1 < a wIL° + a wC° and Δp < Δp IL° + Δp C°). For a certain carbohydrate and at the same molality of IL, the magnitude of the departures for the investigated ILs follows the order: [Bmim][BF4] > [Bmim][HSO4] ≫ [Bmim][Br]. In the case of [Bmim][BF4]/carbohydrate aqueous systems, which have a phase separation capability, the soluting-out power of the carbohydrates on [Bmim][BF4] in aqueous solutions (or negative deviation from the semi-ideal behavior) reduced by decreasing the hydrophilicity of the carbohydrates. Aqueous [Bmim][Br]/carbohydrate and [Bmim][HSO4]/carbohydrate systems are unable to form the ABS, and the soluting-out effect of the ILs on the aqueous carbohydrate solutions appears in the form of precipitation of sugars from the aqueous solutions.

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Section: Resultsmentioning

confidence: 99%

Vapor Pressure Osmometry Studies of Aqueous Ionic Liquid–Carbohydrate Systems

Jamehbozorg

Sadeghi

2018

J. Chem. Eng. Data

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“…Moreover, both species (polymers and ILs) are able to act as salting-out agents. This property opens possibilities for the design of an appropriate and selective ATPS [ 138 , 139 ]. Some polymers used in the IL-based ATPSs are summarized in Table 2 .…”

Section: Phase Equilibrium Of the Il-based Atpssmentioning

confidence: 99%

Phase Behavior of Ionic Liquid-Based Aqueous Two-Phase Systems

Zheng

Yao

et al. 2022

IJMS

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As an environmentally friendly separation medium, the ionic liquid (IL)-based aqueous two-phase system (ATPS) is attracting long-term attention from a growing number of scientists and engineers. Phase equilibrium data of IL-based ATPSs are an important basis for the design and optimization of chemical reactions and separation processes involving ILs. This article provides the recent significant progress that has been made in the field and highlights the possible directions of future developments. The effects of each component (such as salting-out agents and ILs) on the phase behavior of IL-based ATPSs are summarized and discussed in detail. We mainly focus on the phase behavior of ATPSs by using ILs, expecting to provide meaningful and valuable information that may promote further research and application.

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“…The salting-out agent in ATPS is employed to separate the more hydrophobic agents from the more hydrophilic one. The general salting-out agents used in combination with ILs include inorganic salt [24], carbohydrates [25] and polymer [26]. However, to the best of our knowledge, carbohydrates have not been used as salting-out agents for metal ion extraction in combination with ILs.…”

Section: Il-based Atps For Metal Separation 41 Atps With Salting-oumentioning

confidence: 99%

Metal Extraction with Ionic Liquids-Based Aqueous Two-Phase System

Ola¹,

Matsumoto²

2018

Recent Advances in Ionic Liquids

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Although ionic liquids (ILs) have excellent properties, their use as extractants in solvent extraction has not completely overcome the problems encountered when organic solvents are used. In conventional solvent extraction, a hydrophobic IL should be used to establish an IL/water biphasic system to replace the conventional organic solvent with ILs. However, the number of water-immiscible ILs is currently limited, and most contain fluorinated anions which are expensive and environmentally nonbenign. Furthermore, the use of an organic solvent as a diluent agent cannot be avoided because of the very high viscosity of ILs. An IL-based aqueous two-phase system (ATPS) can overcome these drawbacks. This chapter summarizes the use of an IL-based ATPS for the separation of metals used in various areas of human life.

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ABS Composed of Ionic Liquids and Polymers

Cited by 7 publications

References 33 publications

Vapor Pressure Osmometry Studies of Aqueous Ionic Liquid–Carbohydrate Systems

Vapor Pressure Osmometry Studies of Aqueous Ionic Liquid–Carbohydrate Systems

Phase Behavior of Ionic Liquid-Based Aqueous Two-Phase Systems

Metal Extraction with Ionic Liquids-Based Aqueous Two-Phase System

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