Abstract
Liquid-liquid equilibrium (LLE) data for the Fe2(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.
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