SDS Volume (3748)

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

Original Measurements

Arda, N.; Sayar, A. A.; Fluid Phase Equilib. 73, 129-138 (1992).

Variables:

Room Temp: 293 $\pu{K}$

Prepared by:

A. Skrzecz

Method/Apparatus/Procedure:

Solubility measurements were made in an equilibrium cell with a stirrer [1] by titration of binary mixtures of known composition with the third component. This was done using 2-propanol for heterogeneous hydrocarbon-water mixtures, until the turbidity had disappeared and 2,2,4-trimethylpentane for homogeneous alcohol-water mixtures until cloudiness was observed. Tie lines were measured in the same cell filled with ternary heterogeneous mixtures of known composition. Mixtures were stirred for 1 h and after separation the samples of each phase were twice analyzed; 2-propanol concentration was determined by GLC using Supelco Carbopack-C 0.2%, CW-1500, 60/80 column on Aerograph Hydrogen-Flame, Model 600-C ($\ce{N2}$, 12-13 mL/s, 373 K). Water was determined by the Karl Fischer method.

Source and Purity of Materials:

1. Merck, dried over anhydrous $\ce{K2CO3}$, distilled, with middle $\pu{80\%}$ collected;
   impurities $\le \pu{0.1\%}$ by GLC; BP = $\pu{355.7 \pm 0.1 K}$,
   $n_{D}^{25} = \pu{1.3756 \pm 0.0005}$
   $\rho^{25} = \pu{783.2 \pm 0.1 kg m-3}$.
2. Merck, dried over anhydrous $\ce{K2CO3}$, distilled, with middle $\pu{60\%}$ collected;
   impurities $\le \pu{0.2\%}$ by GLC; BP = $\pu{37 \pm 0.1 K}$,
   $n(\pu{293 K},D) = \pu{1.3890 \pm 0.0005}$,
   $\rho(\pu{293 K}) = \pu{695.8 \pm 0.1 kg m-3}$
3. Source not specified.

Estimated Errors:

Ambient temperature: $\pu{\pm 0.1 K}$.
Solubility: Solubility curve $x = \pu{\pm 0.0025}$
2-propanol $x = \pu{\pm 0.0050}$
water $x = \pu{\pm 0.0025}$

References

¹ Sayar, A. A.; J. Chem. Eng. Data 36, 61 (1991).