Density, Viscosity, Speed of Sound, Bulk Modulus, Surface Tension, and Flash Point of Binary Mixtures of Butylcyclohexane with Toluene or n-Hexadecane

Abstract

The viscosities and densities ((293.15 to 353.15) K), speeds of sound ((293.15 to 333.15) K), surface tensions (room temperature), and flash points were measured for binary mixtures of n-butylcyclohexane with either toluene or n-hexadecane. Increasing the temperature decreased the densities, and the excess molar volumes of the mixtures were generally positive, suggesting increased spacing due to differences in packing and intermolecular forces. Increasing the temperature also decreased the viscosities, and the McAllister three-body model successfully modeled the viscosity with the larger fitting term corresponding to two molecules of the more viscous substance. The mixture surface tensions and flash points fell between the pure-component values, which ranged from (26.7 to 28.6) mN•m −1 and (324.7 to 406.2) K, respectively. The speed of sound decreased with increasing mole fraction of n-butylcycylohexane in nhexadecane, but several speed of sound values for mixtures of n-butylcyclohexane and toluene were lower than those of either component. For both sets of mixtures, the isentropic bulk moduli of several mixtures were lower than those of their components. These results show that simple blending rules cannot be used to predict the speed of sound and bulk modulus of these mixtures.

Calculation of the Surface Tension of Ordinary Organic and Ionic Liquids by Means of a Generally Applicable Computer Algorithm Based on the Group-Additivity Method

“…This collection has been complemented—and its data compared—by the more recent collective papers [ 11 , 12 , 17 , 18 ]. Additionally, surface-tension data have been provided for various alkanes [ 19 , 20 , 21 , 22 , 23 , 24 ], alkylbenzenes [ 25 ], haloalkanes [ 26 , 27 ], halogenated esters and ethers [ 28 ], sulfoxides [ 29 ], and siloxanes [ 30 , 31 ]. Of particular interest are surface-tension data for ionic liquids.…”

High-Temperature, High-Pressure Viscosities and Densities of n-Hexadecane, 2,2,4,4,6,8,8-Heptamethylnonane, and Squalane Measured Using a Universal Calibration for a Rolling-Ball Viscometer/Densimeter

“…The fitting procedure is described by Caudwell et al 3 and in our previous studies 13, 39 obtained in the present study and other studies to Tait calculated densities, ρ calc .  -This study,  -Cannet et al 31 , -Barrahou et al 63 ,  -Et-Tahir et al 32 ,  -Zeberg-Mikkelsen et al 37 , ⊞ -Fermeglia and Torriano 33 , and ⊠ -Lunning-Prak et al 36,64,65 .…”

“…The derived RBVD calibration equation is used for viscosity measurements at temperatures to 530 K and pressures 250 MPa for n-hexadecane (HXD), 2,2,4,4,6,8,8-heptamethylnonane (HMN), and 2,6,10,15,19,23-hexamethyltetracosane 5 (squalane), which exhibit viscosities from 0.4 to 1200 mPa•s in the T-p region studied here. HXD and squalane viscosities are compared to accepted reference correlations 18,19 and available literature data 4, 6-8, 11, 12, 16, 20-30 and HMN data are compared to available literature data 27, [31][32][33][34][35][36][37] to validate the calibration approach. The necessity of the new RBVD calibration equation is demonstrated with a direct comparison of HXD, HMN, and squalane viscosity data obtained in the present study with viscosities obtained using a quadratic polynomial calibration equation.…”

Calculation of the Surface Tension of Ordinary Organic and Ionic Liquids by Means of a Generally Applicable Computer Algorithm Based on the Group—Additivity Method

“…This collection has been complementedand its data comparedby the more recent collective papers [11,12,17,18]. Additionally, surface-tension data have been provided for various alkanes [19][20][21][22][23][24], alkylbenzenes [25], haloalkanes [26,27], halogenated esters and ethers [28], sulfoxides [29] and siloxanes [30,31]. Of particular interest are surface-tension data for ionic liquids.…”