Excess molar enthalpies and volumes of binary mixtures of nonafluorobutylmethylether with ethylene glycol ethers at T=298.15K

Minamihonoki, Takashi; Ogawa, Hideo; Murakami, Sachio; Nomura, Hiroyasu

doi:10.1016/j.jct.2005.02.011

Cited by 10 publications

(4 citation statements)

References 14 publications

(17 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Since the isomers of the HFE-7100 and HFE-7200 mixtures are similar substances with the same functional groups, the relative volatility of the substances can be expected to be close to 1. As a result, the isomers are difficult to separate from each other, e.g., by gasliquid chromatography [11]. Therefore, most producers, including the 3M company, declare HFE-7100 and HFE-7200 as mixtures of two inseparable isomers with essentially identical properties.…”

Section: Introductionmentioning

confidence: 99%

Influence of Isomeric Composition and Sample Handling on the Liquid Density of Hydrofluorethers Measured by Vibrating Tube Densimeter at 0.1 MPa

Prokopová

Blahut

Hajduch

et al. 2023

Preprint

View full text Add to dashboard Cite

Hydrofluoroethers (HFEs) represent a new family of promising engineering fluids suitable for technical cleaning, cooling of electronic and magnetic devices or as admixtures in refrigerant blends. Here we report accurate data for the liquid density at 0.1\,MPa and temperatures from $273.15\,\mathrm{K}$ to $343.15\,\mathrm{K}$ for a series of five HFEs; namely HFE-7000, HFE-7100, HFE-7200, HFE-7300, and HFE-7500. A highly sensitive vibrating tube densimeter with a borosilicate glass U-tube calibrated according to the procedure by Prokopov\'{a} et al. [J. Chem. Thermodyn. 173 (2022) 106855] provided density data with an expanded uncertainty ($k=2$) of $0.13\,\mathrm{kg\cdot m^{-3}}$. Influences such as sample degassing, water content or sample temperature before its dosing into the densimeter are discussed. Thanks to the high sensitivity of the used densimeter, an unexpected shift in the density of different HFE-7100 and HFE-7200 liquid samples was detected. Unlike other HFEs, HFE-7100 and HFE-7200 are mixtures of two hardly separable isomers, which were so far considered having identical thermophysical properties. Utilizing nuclear magnetic resonance spectroscopy, the ratio of \textit{n}-isomer and \textit{iso}-isomer was inspected for various liquid samples. In the range of \textit{iso}-isomer mole fraction from 0.61 to 0.77, the new measurements revealed density differences of more than $5\,\mathrm{kg\cdot m^{-3}}$ in case of HFE-7100 and of about $3\,\mathrm{kg\cdot m^{-3}}$ in case of HFE-7200. Consequently, for some applications the properties of different HFE isomers cannot be considered identical. The Rackett-type correlation for the saturated liquid density was fitted using the new and the literature data.

show abstract

Section: Introductionmentioning

confidence: 99%

Influence of Isomeric Composition and Sample Handling on the Liquid Density of Hydrofluorethers Measured by Vibrating Tube Densimeter at 0.1 MPa

Prokopová

Blahut

Hajduch

et al. 2023

Preprint

View full text Add to dashboard Cite

show abstract

“…HFEs find use as cleaning solvents, refrigerants, blowing agents, and dry etching agents in semiconductor manufacturing. Physicochemical properties of pure HFEs, − high-pressure densities for binary mixtures, − excess molar enthalpies, and excess molar volumes − have been studied. However, data on phase equilibria in binary systems, that are useful for assessment of HFE behavior in mixtures, are rare in literature.…”

Section: Introductionmentioning

confidence: 99%

Isothermal Vapor–Liquid Equilibria for Binary Mixtures of Methyl Nonafluorobutyl Ether + Acetone, Cyclopentyl Methyl Ether, Ethyl Acetate, n-Heptane, Methanol, and Toluene

et al. 2017

View full text Add to dashboard Cite

Measurements of vapor−liquid equilibrium data in binary systems methyl nonafluorobutyl ether + solvent (acetone, cyclopentyl methyl ether, ethyl acetate, nheptane, methanol, and toluene) were carried out at constant temperature (328.15 or 318.15 K) by means of a vapor−liquid equilibrium circulation still. In the most cases, the acquired data satisfied thermodynamic consistency tests. The obtained vapor−liquid equilibrium data were (successfully) correlated by two principally different thermodynamic models: the nonrandom two-liquid equation for the excess Gibbs energy, and the perturbed-chain statistical associating fluid theory equation of state. The latter model was tested also for its predictive capabilities and was found not to be suitable for reliable predictions in the studied binary systems, although it may correctly predict the azeotropic behavior of some systems.

show abstract

“…In the past few years, substantial attempts have been made on the measurement, analysis and interpretation of basic thermodynamic properties such as excess volume and density [1,2], viscosity [3], excess volume and enthalpy [4,5], and excess enthalpy [6] of binary mixtures containing alkoxyethanols. The literature reveals that no efforts have been made to provide the V E m and H E m values of these higher alkoxyethanols: DEGMPE, DEGMBE, TEGMME, TEGMEE and TEGMBE with particular 1,2-DCP.…”

Section: Introductionmentioning

confidence: 99%

Excess molar volumes and excess molar enthalpies of the binary mixtures of 1,2-dichloropropane with di- and triethylene glycol mono-alkyl ethers at T=298.15K

Sen¹,

Kim²

2009

Fluid Phase Equilibria

View full text Add to dashboard Cite

Excess molar enthalpies and volumes of binary mixtures of nonafluorobutylmethylether with ethylene glycol ethers at T=298.15K

Cited by 10 publications

References 14 publications

Influence of Isomeric Composition and Sample Handling on the Liquid Density of Hydrofluorethers Measured by Vibrating Tube Densimeter at 0.1 MPa

Influence of Isomeric Composition and Sample Handling on the Liquid Density of Hydrofluorethers Measured by Vibrating Tube Densimeter at 0.1 MPa

Isothermal Vapor–Liquid Equilibria for Binary Mixtures of Methyl Nonafluorobutyl Ether + Acetone, Cyclopentyl Methyl Ether, Ethyl Acetate, n-Heptane, Methanol, and Toluene

Excess molar volumes and excess molar enthalpies of the binary mixtures of 1,2-dichloropropane with di- and triethylene glycol mono-alkyl ethers at T=298.15K

Contact Info

Product

Resources

About