Components:
(1) Ethanol,
C2H6O; [64-17-5]
NIST WebBook
(2) 2,4,4-Trimethyl-1-pentene,
C8H16; [107-39-1]
NIST WebBook
(3) Water,
H2O; [7732-18-5]
NIST WebBook
Original Measurements
Kretschmer, C. B.; Wiebe, R.; Ind. Eng. Chem. 37, 1130 (1945).
Variables:
Ambient temperature: 228 - 298 K
Prepared by:
Method/Apparatus/Procedure:
A glass tube with stirrer containing the ternary mixture was immersed in a bath, the temperature of which could be varied. Mixtures were prepared directly in the tube, by special pipettes at 15.5°C. Precautions to exclude moisture and to prevent evaporation were observed. No correction was made for the slight expansion in volume when alcohol was mixed with hydrocarbon. In the paper the experimental results were expressed as the water tolerance of the alcohol-hydrocarbon blend. For practical purposes water tolerance was defined as the volume percent of water which can be added before separation occurs.
Source and Purity of Materials:
- Source not specified; anhydrous ethanol.
- Source not specified.
- Source not specified.
Estimated Errors:
Ambient temperature: Temp. within about 0.3°C (duplicate determinations); composition <0.2% relative of volume fraction.
Mass concentration (m/v) (1): Not reported.
Experimental Values:
Note: Water tolerance (S) was described with probable error <0.5% at the range -45-25°C by the equation: log(S)=a-b/(T/K). The parameters (a,b) were determined from plots. Water tolerance was defined as: S=H2O% by volume · (100 - Hydrocarbon % by volume in the blend)/100.Compositions along the saturation curve
| T (°C) | T (K) | w1 | w2 | x1 | x2 |
|---|---|---|---|---|---|
| -45.0 | 228.2 | 5.127 x 10-1 | 4.619 x 10-1 | 6.682 x 10-1 | 2.471 x 10-1 |
| -45.0 | 228.2 | 2.671 x 10-1 | 7.219 x 10-1 | 4.515 x 10-1 | 5.010 x 10-1 |
| 0.0 | 273.2 | 5.021 x 10-1 | 4.523 x 10-1 | 6.242 x 10-1 | 2.309 x 10-1 |
| 0.0 | 273.2 | 2.648 x 10-1 | 7.158 x 10-1 | 4.355 x 10-1 | 4.832 x 10-1 |
| 25.0 | 298.2 | 4.954 x 10-1 | 4.463 x 10-1 | 5.984 x 10-1 | 2.213 x 10-1 |
| 25.0 | 298.2 | 2.634 x 10-1 | 7.120 x 10-1 | 4.258 x 10-1 | 4.725 x 10-1 |
