Chemical equilibrium for the reactive system acetic acid+n-butanol+n-butyl acetate+water at 308.15K

Abstract

A B S T R A C TChemical equilibrium (CE) for the quaternary reactive system of acetic acid-n-butanol-n-butyl acetatewater was studied at 308.15 K and atmospheric pressure. The experimental data on CE were considered in comparison with the data on liquid-liquid equilibrium: the CE is reached both in homogeneous and heterogeneous area of reactive mixture compositions. The crossing of CE and binodal surfaces is presented in a composition tetrahedron and a square of transformed composition variables. The thermodynamic constant of CE at 308.15 K was determined with the use of NRTL and UNIQUAC models.

Chemical equilibrium for the reactive system propionic acid + ethanol + ethyl propionate + water at 303.15 and 313.15 K

“…It should be noted that LLE tie-lines on the surface of CE are analogous to unique reactive tie-lines which were introduced by Ung and Doherty for heterogeneous CE in ternary mixtures [8]. In quaternary system the set of unique reactive tie-lines forms the linear surface in composition tetrahedron [7,9].…”

Liquid–Liquid Equilibrium of Alcohol (Ethanol or n-Propanol)–Ester (Ethyl or n-Propyl Propionate) Systems with a Deep Eutectic Solvent Based on Choline Chloride at 293.15 K

“…Mixtures of alcohol, ester, and DESs of given compositions were placed in a thermostat at a fixed temperature and stirred with a magnetic stirrer for 3–4 h. Standard uncertainty of the temperature is 0.05 K. To reach phase equilibrium and complete liquid-phase splitting, the systems under the study were kept for 12 h. The compositions of two coexisting phases were analyzed using 1 H NMR spectroscopy. NMR analysis has been described in detail in our previous studies. ,− Figure shows the 1 H NMR spectra of the studied DES. Peaks from protons in CH 2 and CH 3 groups of each compound in the organic and DES-rich phase were used for integration.…”

Liquid–Liquid Equilibrium, Solubility, and Critical States in an Acetic Acid–n-Butyl Alcohol–n-Butyl Acetate–Water System at 328.15 K and 101.3 kPa: Topology of Phase Diagrams and NRTL Modeling

“…At the same time, in ref ., we paid attention to the articles devoted to chemical equilibrium (CE) in the mixture under study. Despite the importance of these studies for reactive distillation, there are only a few available studies on this topic in the literature, − not to mention the critical phenomena in such systems. The compositions of the critical phases were studied mainly in our studies. ,, It should be noted that work deals with a special information about the critical point of LLE on the surface of CE.…”

“…Despite the importance of these studies for reactive distillation, there are only a few available studies on this topic in the literature, − not to mention the critical phenomena in such systems. The compositions of the critical phases were studied mainly in our studies. ,, It should be noted that work deals with a special information about the critical point of LLE on the surface of CE. In other words, study presents the intersection of CE and the binodal surface that leads to the appearance of an unique critical point at CE.…”

“…The compositions of the critical phases were studied mainly in our studies. ,, It should be noted that work deals with a special information about the critical point of LLE on the surface of CE. In other words, study presents the intersection of CE and the binodal surface that leads to the appearance of an unique critical point at CE.…”