Volumes of mixing of ternary alkane mixtures with branched chain components
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Abstract:
Measurements at 25 °C are reported for the volumes of mixing of binary mixtures of n-dodecane + 2 methyl pentane and of ternary mixtures created by mixing an equimolar mixture of (n-decane + n-tetradecane) with each of the isomers of hexane. The results are compared with the work of Hamam etal. for binary mixtures of n-dodecane with the hexane isomers and shown to be in accord with the principle of congruence within the limits of experimental accuracy of the measurements.Keywords:
Tetradecane
Alkane
Pentane
Dodecane
Decane
Hexane
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Alkane
Decane
Dodecane
Octadecane
Hexadecane
Dilution
Hexane
Tetradecane
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Measurements at 25 °C are reported for the volumes of mixing of binary mixtures of n-dodecane + 2 methyl pentane and of ternary mixtures created by mixing an equimolar mixture of (n-decane + n-tetradecane) with each of the isomers of hexane. The results are compared with the work of Hamam etal. for binary mixtures of n-dodecane with the hexane isomers and shown to be in accord with the principle of congruence within the limits of experimental accuracy of the measurements.
Tetradecane
Alkane
Pentane
Dodecane
Decane
Hexane
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Citations (6)
Undecane
Tetradecane
Decane
Dodecane
Nonane
Hexadecane
Octadecane
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Citations (51)
Pentane
Alkane
Dodecane
Heptane
Decane
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Citations (15)
The liquid–liquid equilibrium (LLE) curves for 2-phenylethan-1-ol (2-phenylethanol, 2PhEtOH) + octane, + decane, + dodecane, + tetradecane or + 2,2,4-trimethylpentane have been determined by a method of turbidimetry using a laser scattering technique. Experimental results reveal that the systems are characterized by an upper critical solution temperature (UCST), which increases linearly with the number of C atoms of the n-alkane. In addition, the LLE curves have a rather horizontal top and become skewed to higher mole fractions of the n-alkane, when its size increases. For a given n-alkane, UCST decreases as follows: phenol > phenylmethanol > 2-PhEtOH, indicating that dipolar interactions decrease in the same sequence. This has been ascribed to a weakening in the same order of the proximity effects between the phenyl and OH groups of the aromatic alkanols. DISQUAC interaction parameters for OH/aliphatic and OH/aromatic contacts in the investigated systems are reported. Phenol, or phenylmethanol or 2-PhEtOH, + n-alkane mixtures only differ by the first dispersive Gibbs energy interaction parameter for the (OH/aliphatic) contact.
Alkane
Tetradecane
Dodecane
Decane
Hexadecane
Turbidimetry
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Citations (7)
Decane
Tetradecane
Hexane
Alkane
Ternary numeral system
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Citations (7)
Measurements at 25 °C are reported for the enthalpies of mixing of 2-methyl pentane with n-dodecane and with each of three pseudo n-dodecanes prepared from equimolar mixtures of n-undecane + n-tridecane, n-decane + n-tetradecane, and n-octane + n-hexadecane respectively. Measurements for mixtures of the equimolar decane + tetradecane mixture with each of the other three branched hexane isomers are also reported. The results are compared with the work of Benson and co-workers for binary mixtures of n-dodecane with the same hexanes. The deviations of 1–2% from the principle of congruence are similar to those reported previously for the ternary n-alkane mixtures.
Tetradecane
Alkane
Decane
Dodecane
Undecane
Hexadecane
Pentane
Octadecane
Hexane
Heptadecane
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The liquid viscosity of pentane and pentane + decane was measured using a rolling ball viscometer at temperatures from 298.15 K to 373.15 K and at pressures up to 25 MPa over the entire composition range. The experimental values are compared with the literature values, and they agree within 3%. Deviation of viscosities results with existing correlations is within 6.6%.
Pentane
Decane
Isopentane
Hexane
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Citations (38)
Tetradecane
Decane
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Abstract Excess volumes v E are reported for mixtures of cis‐ and trans‐1,4‐dimethylcyclohexane + n‐heptane, n‐decane, and n‐tetradecane at 293.15 and 313.15 K. The measurements were performed using a vibrating tube densimeter. As expected from previous measurements on methylcycloalkanes, mixtures of the more planar trans‐1,4‐dimethylcyclohexane exhibit a more negative v E than those of the cis‐compound. This effect increases with the chain length of the alkane.
Decane
Alkane
Cycloalkane
Tetradecane
Heptane
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Citations (19)