Ternary Liquid−Liquid Equilibria of Acetonitrile and Water with Heptanoic Acid and Nonanol at 323.15 K and 1 atm

Abstract

Liquid−liquid equilibrium data were measured and correlated for the ternary systems acetonitrile + water + heptanoic acid and acetonitrile + water + nonanol at 323.15 K and 1 atm. The liquid−liquid equilibrium data were measured using the direct analytical method in a double-walled glass cell. The binodal curve was correlated using a modified Hlavatý equation, a β function, and a log γ equation. The experimental tie lines were correlated using the NRTL and UNIQUAC activity coefficient models. Fitting of both activity coefficient models was undertaken by nonlinear least-squares regression of the data. The tie-line data were used to derive the selectivity values for solvent separation efficiency.

Ternary Liquid–Liquid Equilibrium Data for the Water + Acetonitrile + {Butan-1-ol or 2-Methylpropan-1-ol} Systems at (303.2, 323.2, 343.2) K and 1 atm

“…Figure shows a schematic of the double-walled glass cell. This apparatus was successfully used in previous studies. , Water was used as the heating fluid which was circulated through the cell wall and cap from a constant temperature bath. The method suggested by Alders was followed for the experimental procedure.…”

“…2 This study forms part of a larger investigation within our research unit to explore potential extractive solvents for the separation of acetonitrile and water. 3 In this study the use of butan-1-ol or 2methylpropan-1-ol as a potential extractive solvent for the separation of acetonitrile and water is investigated. Ternary LLE data for the water + acetonitrile + (butan-1-ol or 2methylpropan-1-ol) systems at (303.2, 323.2 and 343.2) K and 1 atm were measured.…”

“…The use of conventional distillation to separate acetonitrile from water is not realistic owing to the formation of a minimum boiling azeotrope . This study forms part of a larger investigation within our research unit to explore potential extractive solvents for the separation of acetonitrile and water . In this study the use of butan-1-ol or 2-methylpropan-1-ol as a potential extractive solvent for the separation of acetonitrile and water is investigated.…”

Density, speed of sound, and refractive index measurements for the binary systems (butanoic acid+propanoic acid, or 2-methyl-propanoic acid) at T=(293.15 to 313.15)K

“…The thermodynamic properties have been discussed in terms of intermolecular interactions between the components of the mixtures. This work is a continuation of our research group's work on thermodynamic properties of carboxylic acid mixture [1,[25][26][27][28].…”

Liquid−Liquid Equilibria for the Quaternary System Water (1) + Acrylic Acid (2) + Acetic Acid (3) + Cyclohexane (4) at (293.15, 303.15, and 313.15) K

“…Therefore, the separation of the mixed acid and water by simple distillation is ruled out. The integration of liquid−liquid extraction and heterogeneous azeotropic distillation is considered to be a comparatively effective method because of a low energy cost. − The key to this method is to find a kind of appropriate solvent which is used as the extractant.…”