SDS Volume (3889)

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

Original Measurements

Plackov, D.; Stern, I.; Fluid. Phase Equilib. 71, 189 (1992).

Variables:

Room Temp: 298 $\pu{K}$

Prepared by:

A. Skrzecz

Method/Apparatus/Procedure:

Binodal compositions were determined by titration with the corresponding, less-soluble component until the appearance of turbidity, [1]. The analytical method was used for determination of tie-lines. This was based on refractive indexes and densities of the samples, [1], combined with the oxidation of the alcohol with an excess of potassium dichromate and determination of unreduced dichromate with $\ce{NaS2O3}$. Alcohol in the organic layer was determined after extraction with water.

Source and Purity of Materials:

1. Kemika (Zagreb); analytical grade; presumably used as received; $n$ = 1.3593, $\rho^{25} = \pu{787.0 kg m-3}$, BP = 79.1°C.
2. Kemika (Zagreb); purity not specified; presumably used as received; $n$ = 1.4232, $\rho^{25} = \pu{773.9 kg m-3}$, BP = 80.0°C.
3. Twice distilled in the presence of $\ce{KMnO4}$.

Estimated Errors:

Ambient temperature: Composition < 0.005 mass fraction, binodal, (relative); composition ±2%, tie line.
Mass concentration (m/v) (1): Not reported.

References

¹ Plackov, D.; Stern, I.; Fluid. Phase Equilib. 57, 327 (1990).