Measurement and correlation of phase equilibrium of the aqueous two-phase system formed by Fe-2(SO4)(3) + PEG 4000+H2O at different temperatures

作者：Villalobos Islaman; Barrueto Yahaira; Garnica Katiuska; Jimenez Yecid P

来源：Journal of Molecular Liquids, 2017, 237: 372-379.

DOI：10.1016/j.molliq.2017.04.071

• Aqueous two-phase system
• Liquid-liquid equilibrium
• Polyethylene glycol
• Ferric sulfate

Liquid-liquid equilibrium (LLE) data for the Fe-2(SO4)(3) + polyethylene glycol 4000 (PEG 4000) + H2O system were determined experimentally at T = (323.15, 333.15 and 343.15) K. The effect of temperature on the binodal curves and tie-lines were studied and it was found that an increasing in temperature caused the expansion of two-phase region.
Additionally, experimental density, sound velocity, refractive index and viscosity data were also reported at T = (323.15, 333.15 and 343.15) K.
The Chen-NRTL, modified Wilson and extended UNIQUAC models and the Othmer-Tobias and Bancroft equations were used to correlate the experimental tie-line data obtaining a good representation of the equilibrium. Furthermore, the Merchuk equation was used to correlate the binodal curves.

• 出版日期2017-7