IUPAC-NIST Solubilities Database

IUPAC-NIST Solubility Database
NIST Standard Reference Database 106

Solubility System: 1-Proponal with Hexane (n-hexane) and Water

Components:
   (1) Water; H2O; [7732-18-5]  NIST Chemistry WebBook for detail
   (2) 1-Proponal (n-propanol, propyl alcohol, n-propyl alcohol); C3H8O; [71-23-8]  NIST Chemistry WebBook for detail
   (3) Hexane (n-hexane); C6H14; [110-54-3]  NIST Chemistry WebBook for detail

Original Measurements:
   Vorobeva, A.I.; Karapetyants, M., Kh., Zh. Fiz. Khim. 41, 1144 (1967).

Variables:
   Temperature = 298 K

Prepared By:
   A. Skrzecz

Experimental Data:   (Notes on the Nomenclature)

Compositions along the saturation curve
t/°C	T/K	Mass Fraction w₁	Mass Fraction w₂	Mole Fraction x₁ (compiler)	Mole Fraction x₂ (compiler)
25	298.2	0.000	0.999	0.0000	0.9952
25	298.2	0.106	0.888	0.1422	0.8309
25	298.2	0.150	0.839	0.1944	0.7581
25	298.2	0.225	0.752	0.2724	0.6348
25	298.2	0.284	0.681	0.3243	0.5423
25	298.2	0.353	0.592	0.3719	0.4349
25	298.2	0.409	0.515	0.4003	0.3515
25	298.2	0.538	0.303	0.4204	0.1651
25	298.2	0.565	0.237	0.4063	0.1188
25	298.2	0.574	0.168	0.3699	0.0755
25	298.2	0.558	0.117	0.3237	0.0473
25	298.2	0.504	0.073	0.2564	0.0259
25	298.2	0.447	0.046	0.2060	0.0148
25	298.2	0.436	0.043	0.1978	0.0136
25	298.2	0.339	0.015	0.1354	0.0042

Compositions of coexisting phases
t/°C	T/K	Mass Fraction w₁	Mass Fraction w₂	Mole Fraction x₁ (compiler)	Mole Fraction x₂ (compiler)	Comment(s)
25	298.2	0.106	0.888	0.1422	0.8309	hydrocarbon-rich phase
25	298.2	0.279	0.688	0.3211	0.5522	hydrocarbon-rich phase
25	298.2	0.302	0.660	0.3397	0.5177	hydrocarbon-rich phase
25	298.2	0.366	0.577	0.3818	0.4198	hydrocarbon-rich phase
25	298.2	0.384	0.551	0.3898	0.3901	hydrocarbon-rich phase
25	298.2	0.462	0.438	0.4196	0.2774	hydrocarbon-rich phase
25	298.2	0.531	0.321	0.4253	0.1793	hydrocarbon-rich phase
25	298.2	0.555	0.117	0.3207	0.0471	hydrocarbon-rich phase
25	298.2	0.546	0.104	0.3057	0.0406	hydrocarbon-rich phase
25	298.2	0.531	0.090	0.2858	0.0338	hydrocarbon-rich phase
25	298.2	0.496	0.068	0.2483	0.0237	hydrocarbon-rich phase
25	298.2	0.457	0.051	0.2142	0.0167	hydrocarbon-rich phase
25	298.2	0.195	0.002	0.0678	0.0005	water-rich phase
25	298.2	0.258	0.006	0.0949	0.0015	water-rich phase
25	298.2	0.269	0.007	0.1000	0.0018	water-rich phase
25	298.2	0.274	0.007	0.1023	0.0018	water-rich phase
25	298.2	0.280	0.008	0.1052	0.0021	water-rich phase
25	298.2	0.282	0.008	0.1062	0.0021	water-rich phase
25	298.2	0.293	0.009	0.1115	0.0024	water-rich phase
25	298.2	0.347	0.017	0.1399	0.0048	water-rich phase
25	298.2	0.358	0.020	0.1463	0.0057	water-rich phase
25	298.2	0.376	0.024	0.1570	0.0070	water-rich phase
25	298.2	0.416	0.036	0.1833	0.0111	water-rich phase
25	298.2	0.457	0.051 (a)	0.2142	0.0167	water-rich phase

Notes:
   ^a  Critical solubility point at 298.2 K.

Method/Apparatus/Procedure:
   The method were reported in Ref. 1. The titration method was used to describe solubility of the mixtures. The third component was added to the binary homogeneous mixture until the cloudiness started to be observed. Density of the saturated mixtures was measured and put on the graphs. To obtain equilibrium ternary mixtures were stirred in thermostated vessel through several hours. After phase separation, density of each phase was measured and composition was determined from earlier prepared graphs. Concentration at critical point was found by the method described in Ref. 2. Water include in propanol was taken into account in all measurements.

Source and Purity of Materials:
   (1) Source not specified, chemical pure grade; distilled; water concentration was determined by the Karl Fischer method.
   (2) Source not specified; properties were the same as reported in Ref. 1.
   (3) Doubly distilled.

Estimated Errors:
   Solubility: Not reported.
   Temperature: Not reported.

References:
   ¹ A. I. Vorobeva and M. Kh. Karapetyants, Zh. Fiz. Khim. 40, 3018 (1966).
   ² E. N. Zilberman, Zh. Fiz. Khim. 26, 1458 (1952).