Vapor–liquid equilibrium measurements of dimethylsulfide, +ethanol, +dimethylether, +methylacetate with a static total pressure method

• Three isothermal VLE of dimethylsulfide + ethanol at 350.4 K, +dimethylether at 336.7 K, +methylacetate at 350.3 K were measured with a static total pressure apparatus.
• The Barker method was used to reduce the experimental data P, T, z data into P, T, x, y data.
• The parameters of Legendre polynomial and Wilson liquid activity coefficient model were optimized.
• All systems exhibited positive deviation from Raoult's law.
• The dimethylsulfide + ethanol system showed azeotropic behavior.

Isothermal vapor–liquid equilibrium (VLE) of three binary mixtures was measured with a static total pressure apparatus: dimethylsulfide + ethanol at 350.4 K, +dimethylether at 336.7 K, +methylacetate at 350.3 K. The Barker method was used to convert the total pressure and total composition measurements into vapor–liquid equilibrium data. Legendre polynomial and Wilson model were used as the liquid activity coefficient model to obtain the compositions of the vapor and liquid phases. All systems exhibited positive deviation from Raoult's law. The dimethylsulfide + ethanol system showed azeotropic behavior (x1az = 0.058, Taz = 350.4 K, Paz = 341.9 kPa).