Phase equilibrium of water plus formic acid plus acetic acid plus solvent (amyl acetate or diisobutyl ketone or diisopropyl ether) quaternary liquid systems


Cehreli S., Baslioglu B.

JOURNAL OF CHEMICAL AND ENGINEERING DATA, cilt.53, ss.1607-1611, 2008 (SCI İndekslerine Giren Dergi) identifier identifier

  • Cilt numarası: 53 Konu: 7
  • Basım Tarihi: 2008
  • Doi Numarası: 10.1021/je800143b
  • Dergi Adı: JOURNAL OF CHEMICAL AND ENGINEERING DATA
  • Sayfa Sayıları: ss.1607-1611

Özet

Liquid-liquid equilibrium data of water + formic acid + acetic acid + solvent (amyl acetate, diisobutyl ketone, and diisopropyl ether) quaternary systems were measured at 298.15 K and atmospheric pressure. Complete phase diagrams were obtained by determining solubility curves and tie-lines. A comparison of the extracting capabilities of the solvents was made with respect to distribution coefficients, separation factors, and solvent-free selectivity bases. Reliability of the data was ascertained from Othmer-Tobias plots. The tie-lines were also predicted using the UNIFAC model. It is concluded that the used solvents can be treated as suitable separating agents for dilute aqueous formic and acetic acid mixtures.