Isobaric Vapor-Liquid Equilibrium Measurements for 1-Methoxy-2-propanol+1,4-Butanediol, N,N-Dimethylformamide, and N-Methyl-2-pyrrolidone at 101.3 kPa

Three candidate entrainers, 1,4-butanediol,N,N-dimethylformamide,andN-methyl-2-pyrrolidone, were proposed to separate the azeotrope of 1-methoxy-2-propanol and water. The isobaric vapor-liquid equilibrium data for 1-methoxy-2-propanol + 1,4-butanediol, 1-methoxy-2-propanol +N,N-dimethylformamide, and 1-methoxy-2-propanol +N-methyl-2-pyrrolidone were measured at 101.3 kPa. All of thedata passed the Fredenslund, Van Ness, and pure component consistency tests. Thebinary parameters were regressed by the non-random two-liquid, Wilson, and universalquasichemical models, and these models agree well with the experimental data. Theaverage absolute deviation and root-mean-square deviations of the temperatures andvapor compositions are all less than 0.2 K and 0.005, respectively. The performance ofcandidate entrainers was compared based on the relative volatility.

Automated summary

Three candidate entrainers were proposed to separate the azeotrope of 1-methoxy-2-propanol and water. The vapor-liquid equilibrium data were measured and various models were used to compare the performance of the candidate entrainers.