Thermodynamic properties of aqueous non-electrolyte mixtures. Excess enthalpies of water + cyclic ether mixtures at 298.15 K

Inglese, A.; Ferino, Italo; Marongiu, Bruno; Solinas, V.; Torrazza, Sergio

doi:10.1016/0040-6031(83)80020-3

Cited by 24 publications

(21 citation statements)

References 19 publications

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“…This results in 1,3-dioxolane having a higher enthalpy of mixing (ΔG M ) than 1,4-dioxane showing that the inter-component attractive forces are weaker in 1,3-dioxolane than 1,4-dioxane leading to the greater enthalpy of mixing of dioxolane. 48 The buffers studied in the present work, that is, MOPS and HEPPS were reported to have a high solubility in water which decreases with an increasing concentration of cyclic ether in the system. Separation is achieved in the aqueous system for non-ionic liquids by buffering out the organic phase from the hydrogen-bonded water network which is attributed to the stronger interaction between the solvent and water compared to the organic component.…”

Section: Comparative Analysis Of the Mechanism Of Phase Separation By Mops Epps And [Tma][epps]mentioning

confidence: 73%

Application of nature‐inspired algorithms with generalized Pitzer‐Debye‐Hückel (PDH) refinement for liquid liquid equilibria (LLE) correlation in cyclic di‐ether systems

et al. 2021

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Metaheuristic algorithms such as the genetic algorithm (GA) and cuckoo search (CS) algorithms have been widely used for phase equilibria computation. In the present work, correlation of the liquid-liquid splitting of 1,3-dioxolane + water and 1,4-dioxane + water mixtures using the buffers 3-n-morpholino-propanesulfonic acidacid (HEPPS), and the ionic-liquid (IL) tetra-methyl-ammonium 3-[4-(2-hydroxymethyl)-1-piperazinyl]propanesulfonate [TMA][EPPS] is performed by the GA-NRTL, CS-NRTL, GA-UNI-QUAC, and CS-UNIQUAC methods. Thermodynamically consistent binary interaction parameters are obtained after a rigorous investigation of the dimensionless excess Gibbs free energy of mixing G M (L)/RT topology thereby satisfying the Gibbs minor common tangent phase stability test. The results indicate that the GA-UNIQUAC method performs the best for correlating the biphasic regions with very high quantitative accuracies and well-resolved G M (L)/RT surface description. Furthermore, the UNIQUAC model is significantly enhanced by incorporating a thermodynamically consistent extended Pitzer-Debye-Hückel* (PDH*) contribution term considering weak electrostatic long-range interactions within the IL-rich phases.

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Section: Comparative Analysis Of the Mechanism Of Phase Separation By Mops Epps And [Tma][epps]mentioning

confidence: 73%

Application of nature‐inspired algorithms with generalized Pitzer‐Debye‐Hückel (PDH) refinement for liquid liquid equilibria (LLE) correlation in cyclic di‐ether systems

et al. 2021

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“…48,49 No corrections or standard liquids are required because interferometry relies on the deter- [4][5][6][7] and excess molar volume (blue), V E ; 11,12 (b) viscosity (blue), η, and excess molar viscosity (red), η E . [13][14][15] mination of path-length change and relative power ratio measured by traceable instruments.…”

Section: Experimental Details and Data Processingmentioning

confidence: 99%

“…It is therefore not surprising that thermodynamic and transport properties of water + DX exhibit pronounced deviations from ideality ( Figure 1). Figure 1a shows the molar heat of mixing, ∆ mix H E , obtained from a fit of selected literature data, [4][5][6][7] as a function of the mole fraction of H-bond acceptor sites (oxygen atoms) in the mixture provided by DX, defined as 8…”

Section: Introductionmentioning

confidence: 99%

Dielectric Spectroscopy of Hydrogen Bond Dynamics and Microheterogenity of Water + Dioxane Mixtures

2007

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Mixtures of water or D2O + 1,4-dioxane (DX) have been studied at 25 degrees C by dielectric relaxation spectroscopy over a wide range of frequencies (0.2 < or = nu/GHz < or = 89) for DX mole fractions 0 < or = x2 < or = 0.67. The spectra were best fitted by the sum of two Debye terms. The slower process was assigned to the cooperative relaxation of the hydrogen-bond network of water, whereas the faster mode reflects the dynamics of H2O molecules in a DX-rich environment. Analysis of the relaxation parameters revealed a largely microheterogeneous structure of the mixtures. The marked slowing-down of the cooperative mode on addition of DX is ascribed to the reduction of available H-bond acceptor sites and geometrical constraints on the H2O molecules in the water-rich regions.

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“…The excess molar enthalpy of branched or cyclic ethers with polar or nonpolar compound binary mixtures has been the subject of a great number of investigations − over the past few years. In contrast to the large body of binary ether mixtures studied, theoretical and experimental investigations are sparse for ternary mixtures formed by two alcohols and an ether.…”

Section: Introductionmentioning

confidence: 99%

Excess Molar Enthalpies of Ternary Mixtures of Ethanol + 1-Propanol + Tetrahydropyran or 1,4-Dioxane at 298.15 K

Tamura

Bhuiyan

2004

J. Chem. Eng. Data

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Excess molar enthalpies for the (ethanol + 1-propanol + tetrahydropyran) and (ethanol + 1-propanol + 1,4-dioxane) ternary mixtures and their binaries (ethanol + tetrahydropyran) have been measured by a flow microcalorimeter at 298.15 K and ambient pressure. The experimental results are correlated with a polynomial equation. The results have been compared with those calculated from a UNIQUAC associated-solution model. This model considers the self-association of like alcohols, cross-association of unlike alcohols, and solvation between alcohols and tetrahydropyran or 1,4-dioxane. The model with the association constants, solvation constants, and binary information alone could satisfactorily represent the ternary excess molar enthalpies.

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Thermodynamic properties of aqueous non-electrolyte mixtures. Excess enthalpies of water + cyclic ether mixtures at 298.15 K

Cited by 24 publications

References 19 publications

Application of nature‐inspired algorithms with generalized Pitzer‐Debye‐Hückel (PDH) refinement for liquid liquid equilibria (LLE) correlation in cyclic di‐ether systems

Application of nature‐inspired algorithms with generalized Pitzer‐Debye‐Hückel (PDH) refinement for liquid liquid equilibria (LLE) correlation in cyclic di‐ether systems

Dielectric Spectroscopy of Hydrogen Bond Dynamics and Microheterogenity of Water + Dioxane Mixtures

Excess Molar Enthalpies of Ternary Mixtures of Ethanol + 1-Propanol + Tetrahydropyran or 1,4-Dioxane at 298.15 K

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