Vapor-liquid equilibrium (VLE) data for the binary systems tetrahydrofuran (THF) + acetic acid (AA) and THF + trichloroethylene (TCE) were measured under isobaric conditions using an ebulliometer. The boiling temperatures for the systems (THF + AA/THF + TCE) are reported for 13/15 compositions and five/six different pressures ranging from 50.2/60.0 to 101.1/101.3 kPa, respectively. The THF + AA system shows simple phase behavior with no azeotrope formation. The THF + TCE system does not exhibit azeotrope formation but seems to have a pinch point close to the pure end of TCE. The nonrandom two-liquid (NRTL) and universal quasichemical (UNIQUAC) activity coefficient models were used to accurately fit the binary (PTx) data. Both models were able to fit the binary VLE data satisfactorily. However, the NRTL model was found to be slightly better than UNIQUAC model in fitting the VLE data for both systems. The results can be used for designing liquid-liquid extraction and distillation processes involving mixtures of THF, AA, and TCE.

Isobaric vapor-liquid equilibrium data of the binary systems comprising 2-ethoxyethanol, 2-ethoxyethyl acetate, and toluene were measured using an ebulliometer. The boiling temperatures of the binary mixtures are reported for six different pressures ranging from 53.3 to 101.3 kPa. The binary system 2-ethoxyethanol-toluene shows a low-boiling azeotrope around 90 mol % toluene. A nonrandom two-liquid (NRTL) model was used to fit the binary (PTx) data. The experimental data were verified using the thermodynamic consistency tests of Redlich-Kister and Wisniak. The reported data were compared with available literature data and modeling results. The studied systems are relevant for the design of azeotropic/reactive distillation columns for the esterification of 2-ethoxyethanol and acetic acid using toluene as an entrainer.