Multiphase Equilibria for Mixtures Containing Acetic Acid, Water, Propylene Glycol Monomethyl Ether, and Propylene Glycol Methyl Ether Acetate

Abstract

A static-type apparatus equipped with a visual cell was utilized in the present study to measure isothermal vapor-liquid equilibrium (VLE) and vapor-liquid-liquid equilibrium (VLLE) data over a temperature range of 323.24 to 393.15 K. The VLE data were determined experimentally for binary mixtures of propylene glycol monomethyl ether (PGME) + propylene glycol methyl ether acetate (PGMEA) and acetic acid + PGME. A minimum pressure azeotrope exhibits on each isotherm of acetic acid + PGME. The VLLE data were also measured for water + PGMEA and water + PGMEA + PGME. The VLLE data could be correlated well by the NRTL and the UNIQUAC models accompanied with the Hayden-O'Connell (HOC) correlation for water + PGMEA over a wide temperature range as linearly temperature-dependent parameters were adopted. The NRTL-HOC model, together with the parameters determined from the phase-equilibrium data of the constituent binaries, predicted reasonably well the binodal curves of water + PGMEA + PGME. By adjustment of six parameters simultaneously, the NRTL-HOC and the UNIQUAC-HOC models correlated satisfactorily the ternary VLLE properties of water + PGMEA + PGME.

Multiphase equilibria for mixtures containing water, isopropanol, propionic acid, and isopropyl propionate

“…The schematic diagram and the detailed operation procedure have been presented elsewhere [13][14][15][16].…”

A combination of low‐temperature reactive and extractive distillation for methoxy‐2‐propyl acetate synthesis and separation process: simulations and experiments

“…In the MPA reaction and separation system, there existed three kinds of binary azeotropes, namely MP–H 2 O, MP–HAC and MPA–H 2 O mixtures, which increased the difficulties of the reactive distillation operation. Therefore a combination of extractive and reactive distillation was developed to separate the generated H 2 O from the system.…”

“…Moreover, the reactive distillation method could simultaneously achieve reaction and separation goals, which also reduced the investment and operating costs. [18][19][20][21][22][23][24][25] In the MPA reaction and separation system, there existed three kinds of binary azeotropes, namely MP-H 2 O, 26 MP-HAC 27 and MPA-H 2 O 4 mixtures, which increased the difficulties of the reactive distillation operation. Therefore a combination of extractive and reactive distillation was developed to separate the generated H 2 O from the system.…”

Isobaric Vapor–Liquid Equilibria for Two Binary Systems {Propylene Glycol Methyl Ether Acetate + Methanol} and {Propylene Glycol Methyl Ether Acetate + N,N-Dimethylformamide} at p = 30.0, 50.0, and 70.0 kPa

“…As an important organic solvent in industry, propylene glycol methyl ether acetate (PMA) is extensively applied to multiple fields, such as coatings, inks, cleaning agents, printing, textile dyes, and leather tanning agents. − The excellent solubility in both polar and nonpolar substances is attributed to the unique structure with carbonyl and ether bonds simultaneously . Moreover, owing to the advantage of low toxicity, more poisonous glycol ether and ester solvents are gradually replaced by PMA.…”