(Liquid+liquid) phase equilibria in electrolyte solutions. Effect of pressure on closed-loop behavior of (a tetra-alkylammonium salt+water)
✍ Scribed by Hermann Weingärtner
- Publisher
- Elsevier Science
- Year
- 1997
- Tongue
- English
- Weight
- 137 KB
- Volume
- 29
- Category
- Article
- ISSN
- 0021-9614
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✦ Synopsis
¨¨D
-44780 Bochum, F.R.G.
Ž
. Ä Ž Liquid q liquid phase equilibria of the binary closed-loop system xn-C H n-3 7
. q y Ž . 4 C H N I q 1 y x H O were investigated at pressures up to 200 MPa. The 4 9 3 2 measurements were performed in an optical high-pressure cell with magnetic stirring according Ž . Ž . to the synthetic method. Data for p T isopleths are reported. Isobaric T x phase diagrams are generated which exhibit closed-loop behavior. The pressure dependence of the closed loop indicates the presence of overlapping low-and high-pressure immiscibility regimes, Ž . resulting in a tube-like shape of the p, T, x -surface of immiscibility. Consequences for thermodynamic functions are discussed in relation to available experimental data for lower homologues of the tetra-alkylammonium salt series, which are completely miscible with water.