Measurements of quaternary liquid-liquid equilibrium for water plus acetic acid plus propionic acid plus solvent (butyronitrile, benzyl acetate, or methyl isobutyl ketone) at 298.15 K

Bilgin M.

JOURNAL OF CHEMICAL AND ENGINEERING DATA, vol.51, no.3, pp.1066-1069, 2006 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 51 Issue: 3
  • Publication Date: 2006
  • Doi Number: 10.1021/je050527x
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.1066-1069
  • Istanbul University Affiliated: Yes


Liquid-liquid equilibrium data of water + acetic acid + propionic acid + solvent ( butyronitrile, benzyl acetate, and methyl isobutyl ketone (MIBK)) quaternary systems were measured. Complete phase diagrams were obtained by determining solubility curves and tie-line data at 298.15 K. The experimental data were compared with predicted values obtained from the UNIFAC method. Selectivity values for solvent separation efficiency were derived from the tie-line data. A comparison of the extracting capabilities of the solvents was made with respect to distribution coefficients, separation factors, and solvent-free selectivity bases. The reliability of the data was ascertained from Othmer-Tobias plots. We conclude that the performance of the solvents increases in the order of butyronitrile, MIBK, and benzyl acetate.