Abstract
In this work, the liquid - liquid and solid - liquid phase behaviour of ten aqueous pseudo-binary and three binary systems containing polyethylene glycol 2050, polyethylene glycol 35000, aniline, N,N-dimethylaniline and water, in the temperature range T = (298.15 to 350.15) K and at ambient pressure of 0.1 MPa, was studied. The obtained temperature-composition phase diagrams showed that the only functional co-solvent was PEG2050 for aniline in water, while PEG35000 even showed a clear anti-solvent effect in the N,N-dimethylaniline aqueous system. The experimental SLE data have been correlated by the Non-Random Two-Liquid (NRTL) model, and the correlation results are in accordance with the experimental results.
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