1.6-Hexanediol based deep eutectic solvent and their excess data at infinite dilution

Separation potential of 1,5-pentanediol-based deep eutectic solvent: Infinite dilution activity coefficients and excess thermodynamic data

“…Physical quantities that were measured are listed in Table 2 . As shown in Table 2 , the obtained results were comparable with the previously investigated deep eutectic solvents [ 43 , 45 ], this includes deep eutectic solvent prepared with a similar hydrogen bond acceptor (organic salt) [ 45 ]. Additionally, this confirmed the nature and cleared the way for further investigation into the deep eutectic solvent's infinite dilution activity coefficients.…”

“…Moreover, the IDAC literature values for the solutes in {[EMPYR]Br + 1,5-PDO} at similar temperatures to those at which measurements were conducted in this study were compared to the DESs with related components, i.e., {[EMPYR]Br + 1,6-PDO} [ 45 ] and {[ChCl] + 1,5-PDO} [ 51 ], as well as the recent studied ionic liquid, [C 7 MIm] [Cl] [ 58 ]. The data comparison of few selected solutes is presented in Table 5 as well as plotted and displayed in Fig.…”

Separation Performance of Ethaline: Infinite Dilution Activity Coefficients and the Excess Thermodynamic Properties

“…In Table , the selectivity values for hexane ( i )/benzene ( j ) ( S ij ∞ = 6.761) and acetone ( i )/methanol ( j ) ( S ij ∞ = 8.015) were high, indicating that ethaline could be a useful deep eutectic solvent for these separation problems. This indicates good solubility for these mixtures. , For the separation of cyclohexane ( i )/hexane ( j ) and ethanol ( i )/toluene ( j ) mixtures, ethaline gave relatively low selectivity values of 0.843 and 0.042, respectively. As is known, the optimal value for a selectivity value is greater than unity (1). , …”

“…Thermodynamic properties are important to study as they are used for prescreening of organic solvents in separation processes. The infinite dilution activity coefficient (IDAC) is a common attributor of all other excess thermodynamic properties, including partial molar excess functions such as enthalpy, entropy, and Gibbs free energy, as well as selectivity and capacity values . IDAC measurements can be determined by several techniques, including inert gas stripping, differential static cell, head space chromatography, and gas–liquid chromatography (GLC). , This study used GLC to determine the infinite dilution activity coefficient values of different organic solutes of different functional groups, including alkanes, alkenes, alkynes, cycloalkanes, cycloalkenes, aromatics, alcohols, ketones, and water in ethaline (1:2 molar ratio) at different temperatures and ambient pressures.…”