Isobaric Vapor–Liquid Equilibrium Data for Tetrahydrofuran + Acetic Acid and Tetrahydrofuran + Trichloroethylene Mixtures

Abstract

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 of Ethyl Acetate + 1-Hexanol, Methanol + 1-Hexanol, and n-Heptane + Cyclohexanol Binary System at 101.3 kPa

“…The relevant calculation formulas are shown in eqs – and among σ indicate the standard deviation of the data. N represents the number of points, and cal and exp represent the calculated and experimental data. , If RMSD­( T ) < 1, RMSD­( y i ) < 0.01, AAD­( T ) < 1, and AAD­( y i ) < 0.01, the regression results are good. …”

“…N represents the number of points, and cal and exp represent the calculated and experimental data. 40,41 If RMSD(T) < 1, RMSD(y i ) < 0.01, AAD(T) < 1, and AAD(y i ) < 0.01, the regression results are good.…”

Measurement and Correlation of Isobaric VLE Data for 1-Propanol + Water + 1-Butyl/Decyl-3-methylimidazole Bromide/Nitrate ILs at 101.33 kPa

“…However, the selection of a suitable entrainer is considered significant for successful separation, necessitating in-depth research and optimization. In the process of screening extractants, the selection was determined by their affinity for the target components and their capacity to accommodate the components awaiting separation, ensuring efficient and economical operation. , The low volatility of extractants was beneficial for equipment stability and was believed to reduce the risk of corrosion considering both environmental and economic factors. When choosing extractants, not only their chemical properties were considered, but it was also imperative that their impacts on the economy and environment were thoroughly evaluated.…”