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Abstract
Three ternary phase diagrams of ethyl paraben, ethanol, water and propyl paraben, ethanol, water have been determined. The liquid-liquid phase separation has been reported in these three ternary diagrams. In pure water the ethyl paraben and propyl paraben solubility is both below 1. mg/g, while in pure ethanol the solubility is more than three orders of magnitude higher. While the solution saturated with propyl paraben is homogeneous at 30.0. °C, and the solution saturated with ethyl paraben is homogenous at 40.0. °C, however, the higher temperatures induce liquid-liquid phase separation in the ethanol-water mixtures, and the ternary phase diagrams contain five different regions. The size of the liquid-liquid phase separation region increases with increasing temperature. The systematic changes of thermodynamic properties between butyl paraben, propyl paraben and ethyl paraben have been investigated.
Original language | English |
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Pages (from-to) | 69-75 |
Number of pages | 7 |
Journal | Fluid Phase Equilibria |
Volume | 376 |
Early online date | 1 Jun 2014 |
DOIs | |
Publication status | Published - 25 Aug 2014 |
Keywords
- ethanol-water solvent
- ethyl paraben
- liquid-liquid phase separation
- propyl paraben
- ternary phase diagram
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Dive into the research topics of 'Ternary phase diagrams of ethyl paraben and propyl paraben in ethanol aqueous solvents'. Together they form a unique fingerprint.Projects
- 1 Finished
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CMAC - EPSRC Centre for Innovative Manufacturing for Continuous Manufacturing and Crystallisation
Florence, A. (Principal Investigator), Bititci, U. (Co-investigator), Halbert, G. (Co-investigator), Littlejohn, D. (Co-investigator) & Sefcik, J. (Co-investigator)
EPSRC (Engineering and Physical Sciences Research Council)
1/10/11 → 31/12/16
Project: Research