FOUR COMPONENT PHASE EQUILIBRIA WITH TETRAMETHYLDIOCTYLDISILOXANE |
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| Authors: | Daniel M Heenan Johan Sjöblom |
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| Institution: | 1. Department of Chemistry , United States Military Academy , West Point, New York, 10996-5000;2. Department of Chemistry , University of Bergen , Bergen, N-5007, Norway |
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| Abstract: | A complete phase diagram was determined for the system: water, butanol, propanol, and tetramethyldioctyldisiloxane (TDDS) using refractive index and gas chromatography. The solubility limits were established by quantitative analysis and compared to the refractive index of known single-phase mixtures. The system contained three two-phase regions and one three-phase region, which separated from one large continuous single phase. The system exhibited a preferential phase stability, which inversely changed with the increase in polarity of the solution. Once a ratio of 3-1 water-propanol was obtained, the phase separation shifted from TDDS to water. The content of the amphophilic components influenced the solubility of TDDS and is reflected in the phase equilibria. |
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