Isothermal Vapor Liquid Equilibrium for 2-Methylpropene + Methanol, + 1-Propanol, + 2-Propanol, + 2-Butanol, and + 2-Methyl-2-propanol Binary Systems at 364.5 K

Abstract

Vapor−liquid equilibrium data were measured using an automatic static total pressure apparatus for binary mixtures of 2-methylpropene + methanol, + 1-propanol, + 2-propanol, + 2-butanol, and + 2-methyl-2-propanol at 364.5 K. The measured p, T, z data were fitted against Legendre polynomials and reduced using Barker's method to obtain phase equilibrium data. In addition to Legendre polynomials, binary interaction parameters were also optimized for Wilson, UNIQUAC, and NRTL activity coefficient models. All binary data showed a positive deviation from the Raoult's law. In addition, azeotropic behavior was observed for the 2-methylpropene + methanol binary mixture.

Vapor−Liquid Equilibrium for Dimethyl Disulfide + Butane, +trans-But-2-ene, + 2-Methylpropane, + 2-Methylpropene, + Ethanol, and 2-Ethoxy-2-methylpropane

“…Uncertainty in the reduced data depended on the uncertainty in the measured values of the temperature, the pressure, and the overall molar composition. Maximum theoretical error of the overall molar composition was calculated by the method presented by Hynynen et al Maximum uncertainty of the reduced data was obtained by alternating the measurement uncertainties between their minimum and maximum values, one at a time, and calculating the average deviation of the results. , …”

Vapor−Liquid Equilibrium for Methoxymethane + Methyl Formate, Methoxymethane + Hexane, and Methyl Formate + Methanol

“…The uncertainty in the cell temperature measurement was ± 0.02 K. The uncertainty in the cell pressure measurement was ± 0.4 kPa. The maximum theoretical error of the injected amount of substance was calculated as presented in Laakkonen et al, and the maximum theoretical error of the overall molar composition was calculated as presented in Hynynen et al Upper and lower boundary values for equilibrium cell temperature, pressure, and the injected amount of moles were used to perform the data reduction. The absolute maximum errors were rounded up and the highest value used as a representative scale of error. , …”

“…The absolute maximum errors were rounded up and the highest value used as a representative scale of error. 8,9 ' RESULTS AND DISCUSSION…”

Vapor−Liquid Equilibrium for 1-Butene + Methanol, + 1-Propanol, + 2-Propanol, + 2-Butanol, and 2-Methyl-2-propanol (TBA) at 364.5 K

“…The compressibility of the liquid was calculated using the Hankinson-Brobst-Thomson model, which, e.g., is described by Hynynen et al 21 In principle, this factorial method approximates the maximum error by first calculating the upper and lower limits for ranges of experimental variation for p, T, n 1 , and n 2 . These four variables are entered at their upper or lower levels to produce 16 combinations for each binary pair.…”