Excess Molar Volumes and Surface Tensions of Xylene with 2-Propanol or 2-Methyl-2-propanol at 298.15 K
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Abstract:
Densities for binary mixtures of (2-propanol + o-xylene, + m-xylene, + p-xylene, 2-methyl-2-propanol + o-xylene, + m-xylene, and + p-xylene) have been determined at 298.15 K, and excess molar volumes have been derived. Surface tension of these binary mixtures have been measured at 298.15 K by the pendant drop method, and the values of the surface tension deviation for these mixtures were also calculated.Keywords:
Propanol
1-Propanol
o-Xylene
p-Xylene
m-Xylene
Densities for binary mixtures of (2-propanol + o-xylene, + m-xylene, + p-xylene, 2-methyl-2-propanol + o-xylene, + m-xylene, and + p-xylene) have been determined at 298.15 K, and excess molar volumes have been derived. Surface tension of these binary mixtures have been measured at 298.15 K by the pendant drop method, and the values of the surface tension deviation for these mixtures were also calculated.
Propanol
1-Propanol
o-Xylene
p-Xylene
m-Xylene
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Propanol
Excess heat
p-Xylene
1-Propanol
m-Xylene
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The feasibility of simultaneous measurement of important components such as o-xylene, m-xylene, p-xylene, ethylbenzene, toluene, aliphatic hydrocarbons, and total C 9 –C 10 aromatic hydrocarbons in the p-xylene production process is investigated. Mixtures of those components were prepared to simulate concentration levels in actual p-xylene processes, and near-infrared (NIR) spectra were collected from mixtures over the spectral range of 1100 to 2500 nm. Even with the very similar spectral features of xylene isomers and other aromatic compounds, the concentrations of each of the components in the mixtures are accurately predicted by using a partial least-squares (PLS) algorithm and show excellent correlation with conventional gas chromatographic analysis. The results clearly demonstrate the possibility of using NIR spectroscopy for monitoring the major components in an actual p-xylene production process for process control and optimization.
p-Xylene
m-Xylene
o-Xylene
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p-Xylene
m-Xylene
o-Xylene
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m-Xylene
p-Xylene
o-Xylene
Mole fraction
Fraction (chemistry)
Carbon fibers
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The refractive indices n of pure tetrahydrofuran (THF), benzene, toluene, o-xylene, m-xylene, p-xylene, mesitylene, and those of their binary mixtures with THF as a common component, over the entire composition range expressed by mole fraction x1 of THF, were measured at temperatures (288.15, 293.15, 298.15, 303.15, 308.15, 313.15, and 318.15) K. From the experimental data, the deviations in refractive index (Δn) have been calculated. It is observed that the extent of deviation in Δn for these mixtures follows the sequence: benzene > toluene > p-xylene > m-xylene > o-xylene > mesitylene.
Mesitylene
Tetrahydrofuran
p-Xylene
m-Xylene
o-Xylene
Mole fraction
Aromatic hydrocarbon
Hydrocarbon mixtures
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A. W. Crossley and G. H. Wren, J. Chem. Soc., Trans., 1911, 99, 2341 DOI: 10.1039/CT9119902341
p-Xylene
o-Xylene
m-Xylene
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p-Xylene
o-Xylene
m-Xylene
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Isobaric vapor–liquid equilibrium (VLE) data were determined at the pressure of 250 kPa for the four binary mixtures composed of 2,2,4-trimethylpentane (isooctane) + para-, ortho-, or meta-xylene and ethylbenzene (EB) by using a circulation-type apparatus, in which both vapor and liquid phases are recirculated. The vapor- and liquid-phase compositions were analyzed by gas chromatography. All of the data were found to be thermodynamically consistent according to the Herington, van Ness, infinite dilution, and pure component consistency tests. The experimental data were regressed with Aspen Plus 7.3, and binary interaction parameters were reported for the most frequently used activity coefficient models: the nonrandom two-liquid (NRTL) and the universal quasichemical activity coefficient (UNIQUAC) models, respectively. All of the calculated values with these models showed good agreement with the experimental data, as well as with available isobaric and isothermal data from the literature.
Isobaric process
p-Xylene
m-Xylene
o-Xylene
Vapor–liquid equilibrium
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Methylcyclohexane
p-Xylene
m-Xylene
o-Xylene
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