Density, Viscosity, and Speed of Sound of Pure and Binary Mixtures of Ionic Liquids Based on Sulfonium and Imidazolium Cations and Bis(trifluoromethylsulfonyl)imide Anion with 1-Propanol

Abstract

We present densities, viscosities, and speed of sound of pure and binary mixtures of three ionic liquids, triethylsulfonium bis­(trifluoromethylsulfonyl)­imide, [Et3S]­[TFSI], 1-allyl-3-methylimidazolium bis­(trifluoromethylsulfonyl)­imide, [Amim]­[TFSI], and 1,3-dihydroxyimidazolium bis­(trifluoromethylsulfonyl)­imide, [(OH)2Im]­[TFSI], with 1-propanol from (293.15 to 343.15) K at 0.1 MPa. We also include densities, viscosities, and speed of sound of pure ionic liquid 1-butyl-1-methylpyrrolidinium bis­(trifluoromethylsulfonyl)­imide for validation. Densities and speed of sound are measured using a vibrating tube densimeter while viscosities are from a pellet microviscometer. The density and viscosity of pure ionic liquids are correlated by means of the Gardas and Coutinho and Vogel–Tammann–Fulcher equations, respectively. From the speed of sound measurements, we obtain isentropic compressibility, speed of sound deviation, and isentropic compressibility deviation for mixtures of ionic liquids and 1- propanol. Excess molar volumes and viscosity deviations are calculated from the experimental data. The excess molar volumes for the binary mixtures with [Et3S]­[TFSI] and [Amim]­[TFSI] present positive and negative deviations from ideality while those for the binary mixture with [(OH)2Im]­[TFSI] exhibit only negative deviations. Viscosity deviations for [Et3S]­[TFSI] + 1-propanol, [Amim]­[TFSI] + 1-propanol, and [(OH)2Im]­[TFSI] + 1-propanol are negative over the entire temperature range. The speed of sound deviations are positive and negative for the binary mixtures of 1-propanol with [Et3S]­[TFSI] and [Amim]­[TFSI], whereas those for the mixture with [(OH)2Im]­[TFSI] are negative.

Effective and Reversible Capture of NH3 by Ethylamine Hydrochloride Plus Glycerol Deep Eutectic Solvents

“…When the contents of Gly are high enough, the addition of Gly results in the dilution of EaCl, and leads to the decrease of viscosities for mixtures. As a result, EaCl+Gly (1:4) has the highest viscosities among the four EaCl+Gly mixtures, with the value of 50.5 cP at 313.2 K. Overall, EaCl+Gly mixtures are less viscous than most ILs reported in the literature. − As is known, liquid solvents with lower viscosities are more easily to transport in pipelines, and usually have fast absorption rate for gases. Therefore, EaCl+Gly mixtures are more appropriate for application in gas absorption process than most ILs.…”

Experimental Study and Modeling Using the PFP Theory and the ERAS Model of the Excess Molar Volume and Isentropic Compressibility of Dimethylbenzylamine with Alkanol Mixtures at Different Temperatures

“…The sample table of the pure materials is indicated in Table . In Table , values of density and speed of sound for dimethylbenzylamine and 1-alkanol are compared with those in the literature. − Densities and speed of sound of pure-state chemicals and binary mixtures at various temperatures are indicated in Table . Literature screening indicates that no density and speed of sound are available for the mentioned binary mixtures.…”

Thermophysical Properties of Solutions of Iron(III) Nitrate Nonahydrate in Mixtures of 1-Propanol and Water

“…In contrast, plenty of data have been reported for mixtures of 1-propanol and water (without INN). Many authors have measured their density [13][14][15][16][17][18][19] . A negative molar excess volume is found, which is caused by the structuring of alcohol + water mixtures due to H-bonding.…”