Densities, Viscosities, Refractive Indices, and Excess Properties of Aqueous 1,2-Etanediol, 1,3-Propanediol, 1,4-Butanediol, and 1,5-Pentanediol Binary Mixtures

Abstract

The thermodynamic and transport properties of aqueous alkanediol systems at atmospheric pressure were studied over the whole concentration range using the experimental values of density and refractive index at temperatures of 288.15−318.15 K with 5 K interval and viscosity at T = 293.15, 298.15, and 303.15 K. The obtained data were compared with those available in literature. A detailed analysis regarding the behavior of aqueous alkanediols and interactions between the mixture components was performed using different excess thermodynamic properties. Moreover, McAllister model and Grunberg−Nissan and its new proposed models were applied to predict the viscosity data. The validity of the proposed equations was assessed by comparisons between the experimental values and those obtained by the models.

Viscosities, Densities, and Refractive Indices of Aqueous Propane-1,3-diol

“…The data on the density and refractive indices of pure PDO are generally in good agreement in the literature, although they are usually limited by a small temperature range. Likewise, the data on the viscosity of pure PDO are strongly limited in the temperature range and furthermore, there are notable differences between reported values from various sources, as has been shown in Moosavi and Rostami and in this work. Unfortunately, the number of available literature sources on the viscosity of pure propane-1,3-diol is very limited, and any further comparison is impossible.…”

“…Molar enthalpies were measured by Nagamachi and Franczesconi and data on heat capacities of some pure α,ω-alkanediols, including PDO, were measured by Góralski and Tkaczyk . The latest study on the properties of selected α,ω-alkanediols/water systems including PDO was prepared by Moosavi and Rostami focusing on density, viscosity, refractive index, and excess properties. For most of the current applications in which PDO is used in its pure form, existing data are generally sufficient, but new applications such as the above-mentioned antifreeze additives, deicers, and others, where PDO is used in a mixture with water, require a much wider range of temperatures and mass fractions than has been reported.…”

“…In the most detailed work on the binary mixture of PDO/water with a full span of measured dilutions from George and Sastry values are measured over a limited range of temperatures from 298.15 to 338.15 K and the most important values for use as antifreeze additives and deicers around and below 273.15 K are not measured. Similarly, the work of Moosavi and Rostami is limited by temperature range T = (288.15 to 318.15) K and a limited number of points in the lower dilutions of PDO, thanks to molar fractions selected for different purposes.…”

Vapor‐ and liquid‐phase adsorption of alcohol and water in silicalite‐1 synthesized in fluoride media

“…The densities of pure components and of aqueous solutions were obtained by extrapolation of the relationships reported in the open literature [39][40][41] to 323 K (see Figure S2 in the SM), allowing solution nonidealities to be captured. In the absence of reported values, the density of the P/E solutions was calculated assuming ideal solution.…”

High-Pressure Phase Equilibrium Studies of Multicomponent (Alcohol-Water-Ionic Liquid-CO2) Systems

“…As a consequence, the (CO 2 +IL) binary systems are always biphasic with multiple options to adjust their solvent properties, e.g., changing pressure, temperature, or structure of ILs ions, which provides a versatile reaction and separation environment. Coupling ionic liquids with carbon dioxide further decreases the viscosity of the liquid phase, improving diffusivity and mass transfer of compounds [15,16], an important factor in the case of the highly viscous 1,4-butanediol [17]. In our approach we explore the hydrophobic nature of a particular ionic liquid, 1-hexyl-3-methylimidazolium tetracyanoborate [18,19], and investigate its feasibility to remove water from the liquid reaction mixture into the dense carbon dioxide phase, shifting the reaction equilibrium towards the product formation.…”