Solvent shifts and component identification of hydrocarbon mixtures by carbon-13 nuclear magnetic resonance spectrometry

Brekke, Trond; Aksnes, Dagfinn W.; Sletten, Einar; Stöcker, Michael

doi:10.1021/ac00157a019

Cited by 9 publications

(1 citation statement)

References 12 publications

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“…The boiling points of ethyl acetate and methylcyclohexane determined at atmospheric pressure are 349.79 and 373.25 K, respectively. The values are in line with the ones reported in the literature, − further validating the reliability of the apparatus and procedure employed to determine the VLE. The activity coefficient γ is plotted against liquid composition ( x 1 ) in Figures S1 and S2.…”

Section: Resultssupporting

confidence: 87%

Separation of Azeotropic Mixtures of Ethyl Acetate + Methylcyclohexane: Vapor–Liquid Equilibrium Measurements

Zhao

Wang

et al. 2023

J. Chem. Eng. Data

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It is a challenge to separate ethyl acetate from methylcyclohexane because of the azeotropic phenomenon. To provide a basis for the design of the separation process, the isobaric vapor–liquid equilibria for an ethyl acetate + methylcyclohexane binary system were measured at 101.3 and 20.0 kPa using a modified Othmer-type still. The results show that ethyl acetate and methylcyclohexane form a miscible azeotropic mixture with minimum boiling temperature (349.99 K at 101.3 kPa), of which the composition varies slightly with decreasing pressure (≤101.3 kPa). It implies that ethyl acetate cannot be separated from methylcyclohexane by pressure-swing distillation. The azeotropy of ethyl acetate and methylcyclohexane disappears in the presence of decane (∼0.5 mole fraction), which means that ethyl acetate can be separated from methylcyclohexane by extractive distillation with decane as an entrainer.

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Section: Resultssupporting

confidence: 87%

Separation of Azeotropic Mixtures of Ethyl Acetate + Methylcyclohexane: Vapor–Liquid Equilibrium Measurements

Zhao

Wang

et al. 2023

J. Chem. Eng. Data

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Intermolecular and intramolecular effects on the ¹H and ¹³C shielding in some gaseous hydrocarbons at various temperatures—experimental results

Bennett

Raynes

1991

Magnetic Reson in Chemistry

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The proton and "C shielding constants in CH, , C,H,, C,H, and some other gaseous hydrocarbons have been studied as functions of density at temperatures in the range 180-370 K. The linear coefficients describing the density dependence of the shielding, after correcting for bulk susceptibility, increase substantially as the temperature is reduced, indicating stronger intermolecular interactions. (Some of the required magnetic susceptibilities were determined in this work by an NMR method). The "C measurements for CH, are close to those of an earlier study; the results for the other gases are new. The linear coefficient is substantially greater for the carbon shielding of the methyl group in propane than for the methylene group at any temperature, but there is virtually no distinction between tbe linear coefficients for the proton shielding in this gas. Values for du,/dT, the temperature dependence of the shielding extrapolated to zero density, are also presented for both proton and "C shielding in the bydrocarboos. They are positive and negative in different instances. It is shown from this and earlier gas-phase studies that standard literature values of the methane "C shielding relative to the ''C shielding in tbe other bydrocarboos are in error.

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Partitioning of Organofluorine Compounds in the Environment

Ellis

Cahill

Mabury

et al.

The Handbook of Environmental Chemistry

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Solvent shifts and component identification of hydrocarbon mixtures by carbon-13 nuclear magnetic resonance spectrometry

Cited by 9 publications

References 12 publications

Separation of Azeotropic Mixtures of Ethyl Acetate + Methylcyclohexane: Vapor–Liquid Equilibrium Measurements

Separation of Azeotropic Mixtures of Ethyl Acetate + Methylcyclohexane: Vapor–Liquid Equilibrium Measurements

Intermolecular and intramolecular effects on the ¹H and ¹³C shielding in some gaseous hydrocarbons at various temperatures—experimental results

Partitioning of Organofluorine Compounds in the Environment

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Solvent shifts and component identification of hydrocarbon mixtures by carbon-13 nuclear magnetic resonance spectrometry

Cited by 9 publications

References 12 publications

Separation of Azeotropic Mixtures of Ethyl Acetate + Methylcyclohexane: Vapor–Liquid Equilibrium Measurements

Separation of Azeotropic Mixtures of Ethyl Acetate + Methylcyclohexane: Vapor–Liquid Equilibrium Measurements

Intermolecular and intramolecular effects on the 1H and 13C shielding in some gaseous hydrocarbons at various temperatures—experimental results

Partitioning of Organofluorine Compounds in the Environment

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Intermolecular and intramolecular effects on the ¹H and ¹³C shielding in some gaseous hydrocarbons at various temperatures—experimental results