SDS Volume (3907)

Volume 69. Ternary Alcohol-Hydrocarbon-Water Systems, p None

Original Measurements

Ricna, K.; Matous, J.; Novak, J. P.; Kubicek, V.; Collect. Czech. Chem. Commun. 54, 581 (1989).

Variables:

Room Temp: 278 $\pu{K}$

Prepared by:

A. Skrzecz

Method/Apparatus/Procedure:

The titration method was used for solubility measurements. Water was added from a calibrated hypodermic syringe (controlled by a micrometer screw) to a binary ethanol-toluene mixture of known mass and composition until persistent turbidity was observed. The direct analytical method was used for liquid-liquid equilibrium measurements. A mixture was stirred vigorously for 2-3 h in a thermostated cell, [1] and after phase separation samples were taken for analysis. A were taken for analysis. A small amount of tetrahydrofuran was added as an internal standard and homogenization agent in GLC analysis. Calibration standards were analyzed separately for each phase prior to each sample analysis by GLC. Conditions of the GLC analysis were: glass column (2.5 mm i.d., 1.5 m), Poropak Q, 200 °C, carrier gas $\ce{H2}$, thermal conductivity detector.

Source and Purity of Materials:

1. Source not specified "extra fine," distilled with benzene; 0.1% $\ce{H2O}$ by the Karl Fischer method; $\rho^{25} = \pu{0.78498 g mL-1}$, $n_{D}^{25}$ = 1.3605.
2. Lachema Neratovice, A. R. grade; shaken five times with $\ce{H2SO4}$ conc., three times with $\ce{H2O}$, then with $\ce{NaOH}$, dried $\ce{Na}$, distilled; $\rho^{25} = \pu{0.86124 g mL-1}$, $n_{D}^{25}$ = 1.4939.
3. Doubly distilled.

Estimated Errors:

Ambient temperature: Temp. ±0.05 K.
Mass concentration (m/v) (1): Not reported.