Densities and Sound Speeds of Ternary Mixtures Methyl tert-Butyl Ether + Toluene + n-Hexane (or Cyclohexane) and Their Binary Subsystems at a Temperature of 298.15 K and under Ambient Pressure

Abstract

Densities ρ and sound speeds c of the ternary systems methyl tert-butyl ether (MTBE) + toluene + n-hexane, MTBE + toluene + cyclohexane, and related binary subsystems MTBE + toluene, MTBE + n-hexane, toluene + n-hexane, MTBE + cyclohexane, and toluene + cyclohexane are measured over the whole composition range at 298.15 K and under ambient pressure. The excess molar volumes, V m E , and isentropic compressibility deviations, Δκ S , were derived from experimental ρ and c data. The experimental results are discussed in terms of the possible interactions between molecules in the mixture and structural effects. The V m E and Δκ S data for the binary and ternary systems were correlated with the Redlich−Kister and Cibulka equations, respectively. Further, the ternary V m E and Δκ S data are compared with the predicted values using the binary contribution models of Radojkovic, Kohler, Rastogi, Tsao-Smith, Toop, and Scatchard. The root-mean-squared deviation between experimental and predicted values is used as a tool to measure the predicting capabilities of the tested models.

Densities and Sound Speeds of Binary Mixtures of Cyclohexane + Benzene (or Toluene, or Ethylbenzene or o-, m-, p-Xylene) within the Temperature Range of 293.15–333.15 K and Ambient Pressure: Experimental, Correlation, and Modeling Study

“…The chemicals were used as supplied but stored over type 4 Å molecular sieves supplied by Sigma-Aldrich. The purity of the substances was checked by measuring their densities and sound speeds at 298.15 K and comparing them with the literature data. ,− ,− Table shows that experimental values for toluene, o -, m -, p -xylene, and ethylbenzene are in good agreement with the literature. The results for cyclohexane and benzene are reported in our previous paper …”

“…The combined expanded uncertainties at a 0.95 confidence level in density and sound speed measurements are U (ρ) = 0.0005 g·cm –3 and U ( u ) = 0.5 m·s –1 , respectively. For more details on the storage of samples, preparation and handling of mixtures, measurement of density and sound speed, and their uncertainty estimation, the reader is referred to our earlier papers. , …”

“… a Standard uncertainties are u ( T ) = 0.01 K; expanded uncertainties at a 0.95 level of confidence are U (ρ) = 0.0005 g·cm –3 , U ( u ) = 0.5 m·s –1 . b Reference . c Reference . d Reference . e Reference . f Reference . g Reference . h Reference . i Reference . j Reference . …”

“…Aliphatic and aromatic hydrocarbons are essential to various industries. − Among these, alkanes and aromatic hydrocarbons of the BTEX group (benzene, toluene, ethylbenzene, and xylenes) are an important class of organic compounds found in high quantities in most petroleum refinery products, such as gasoline, naphtha, and kerosene . However, production, storage, transportation, and everyday use of petroleum refinery products in various industries are associated with their emissions into the environment, some suspected of causing genotoxic and possibly carcinogenic health effects .…”

Thermodynamic Properties of Ethanol + Pyridine, Ethanol + Benzene, and Pyridine + Benzene Mixtures at Temperature 298.15 K and Under Atmospheric Pressure

“…The work described in this paper belongs to a systematic study program concerning the measurement and mathematical description of various thermodynamic properties of binary and ternary liquid mixtures containing important compounds [1][2][3]. The study of thermodynamic properties of binary mixtures of alkanols with aromatics is of great importance both from a practical and theoretical point of view.…”