Isobaric Vapor–Liquid Equilibium for the Binary Systems of Methyl Formate with o-Xylene, m-Xylene, p-Xylene, and Ethylbenzene at 101.33 kPa

Abstract

Isobaric vapor−liquid equilibrium (VLE) data are reported for binary mixtures of methyl formate + o-xylene, methyl formate + m-xylene, methyl formate + p-xylene, and methyl formate + ethylbenzene at 101.33 kPa. The data are obtained using a vapor recirculating type (modified Othmer's) equilibrium still. All of the binary systems show positive deviation from ideality. None of the systems form an azeotrope. The VLE data for these binary systems are checked to meet rigorous thermodynamic consistency by the Herington method and the point-to-point test of the Fredenslund method. The experimental VLE data are well-correlated by the nonrandom two-liquid (NRTL), universal quasichemical activity coefficient (UNIQUAC), and Wilson equations.

Isobaric Vapor–Liquid Equilibrium for Binary Systems of Thioglycolic Acid with Water, Butyl Acetate, Butyl Formate, and Isobutyl Acetate at 101.3 kPa

“…To verify the reliability of the experimental values, the point-to-point test of Van Ness , was applied to check the thermodynamic consistency. The Van Ness method is a modeling capability test and applied to examine the reliability of every experimental point.…”

“…The method can be shown as follows where N denotes the experimental data points number; the superscript cal represents calculated value, the value of y i cal can be obtained from the Wilson, NRTL, and UNIQUAC activity coefficient models. Along with the reported work, , NRTL was selected to calculate y i cal ; the superscript exp represents experimental value.…”

1,2‐Dimethoxyethane Degradation Thermodynamics in Li−O2 Redox Environments

“…The lack of a clear identification of the predicted final byproducts can also be explained by considering that, although dimethyl oxalate ( M13 ) is solid at room temperature, both methyl formate ( M33 ) and ethylene glycol diformate ( M31 ) are liquids and are likely partially soluble in moderately polar organic solvents like ethers. Moreover, methyl formate is highly volatile at room temperature, with a boiling temperature of only 32 °C, compared to 164 °C and 174 °C for dimethyl oxalate ( M13 ) and ethylene glycol diformate ( M31 ), respectively . Concerning the other byproducts 1‐formate‐methyl acetate ( M24 ) and methoxy ethanoic methanoic anhydride ( M19 ), no additional comments are possible; to our knowledge, these chemical species have not been fully experimentally investigated.…”

Isobaric Vapor–Liquid Equilibrium for the Binary Systems of Diethyl Carbonate with Xylene Isomers and Ethylbenzene at 101.33 kPa

“…Li and Gmehling have reported that 2-methyl-1-butanol can form the binary azeotrope with ethylbenzene or o -, m -, or p -xylene at different pressures. In our previous research, Yang , and Xue have measured isobaric VLE data for binary systems (2-methyl-1-butanol, 1-butanol, or methyl formate) with ethylbenzene, o -, m -, or p -xylene at 101.33 kPa to reconfirm the reliability of literature reports. When there is no experimental data in the open published literature, another main method to select the azeotrope solvent is to use the group contribution model, similar to the UNIFAC model, to predict the liquid activity coefficient for this binary pair or the entire component system.…”