Phase equilibria for ternary liquid systems of (water plus tetrahydrofuran plus nonprotic aromatic solvent) at T=298.2 K

Senol A. , Sevgili L. M.

JOURNAL OF CHEMICAL THERMODYNAMICS, cilt.38, sa.5, ss.578-584, 2006 (SCI İndekslerine Giren Dergi) identifier identifier

  • Cilt numarası: 38 Konu: 5
  • Basım Tarihi: 2006
  • Doi Numarası: 10.1016/j.jct.2005.07.010
  • Sayfa Sayıları: ss.578-584


(Liquid + liquid) equilibrium (LLE) data of the solubility curves and tie-line end compositions are presented for mixtures of {water (1) + tetrahydrofuran (2) + xylene or chlorobenzene or benzyl ether (3)} at T = 298.2 K and P = (101.3 +/- 0.7) kPa. Among the studied C6 ring-containing aromatic solvents, xylene gives the largest distribution ratio and separation factors for extraction of tetrahydrofuran. A solvation energy relation (SERLAS) has been used to estimate the (liquid + liquid) equilibria of associated systems containing a nonprotic solvent. The tie-lines were also predicted using the UNIFAC-original model. The reliability of both models has been analyzed against the LLE data with respect to the distribution ratio and separation factor. SERLAS matches LLE data accurately, yielding a mean error of 9.9% for all the systems considered. (C) 2005 Elsevier Ltd. All rights reserved.