IUPAC-NIST Solubilities Database

IUPAC-NIST Solubility Database
NIST Standard Reference Database 106

Solubility System: 1-Propanol with heptane 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) Heptane (n-heptane); C7H16; [142-82-5]  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	0.9945
25	298.2	0.054	0.944	0.0861	0.9032
25	298.2	0.125	0.867	0.1861	0.7742
25	298.2	0.159	0.828	0.2275	0.7105
25	298.2	0.219	0.758	0.2919	0.6059
25	298.2	0.270	0.696	0.3371	0.5212
25	298.2	0.405	0.521	0.4200	0.3240
25	298.2	0.482	0.414	0.4474	0.2305
25	298.2	0.546	0.316	0.4566	0.1585
25	298.2	0.592	0.206	0.4261	0.0889
25	298.2	0.589	0.134	0.3697	0.0504
25	298.2	0.560	0.091	0.3148	0.0307
25	298.2	0.506	0.054	0.2522	0.0161
25	298.2	0.407	0.023	0.1753	0.0059
25	298.2	0.284	0.007	0.1070	0.0016
25	298.2	0.167	0.003	0.0569	0.0006

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	0.052	0.946	0.0831	0.9063	hydrocarbon-rich phase
25	298.2	0.089	0.906	0.1371	0.8372	hydrocarbon-rich phase
25	298.2	0.138	0.852	0.2022	0.7489	hydrocarbon-rich phase
25	298.2	0.153	0.835	0.2205	0.7218	hydrocarbon-rich phase
25	298.2	0.168	0.818	0.2382	0.6956	hydrocarbon-rich phase
25	298.2	0.173	0.812	0.2437	0.6859	hydrocarbon-rich phase
25	298.2	0.186	0.797	0.2581	0.6632	hydrocarbon-rich phase
25	298.2	0.212	0.766	0.2846	0.6168	hydrocarbon-rich phase
25	298.2	0.242	0.731	0.3141	0.5690	hydrocarbon-rich phase
25	298.2	0.334	0.614	0.3814	0.4205	hydrocarbon-rich phase
25	298.2	0.390	0.542	0.4141	0.3451	hydrocarbon-rich phase
25	298.2	0.417	0.505	0.4255	0.3090	hydrocarbon-rich phase
25	298.2	0.186	0.004	0.0644	0.0008	water-rich phase
25	298.2	0.236	0.004	0.0851	0.0009	water-rich phase
25	298.2	0.318	0.010	0.1239	0.0023	water-rich phase
25	298.2	0.378	0.018	0.1573	0.0045	water-rich phase
25	298.2	0.470	0.039	0.2205	0.0110	water-rich phase
25	298.2	0.533	0.070	0.2806	0.0221	water-rich phase
25	298.2	0.584	0.122	0.3566	0.0447	water-rich phase
25	298.2	0.594	0.194	0.4190	0.0821	water-rich phase
25	298.2	0.579	0.253	0.4484	0.1175	water-rich phase
25	298.2	0.496	0.394	0.4512	0.2150	water-rich phase
25	298.2	0.450	0.460	0.4386	0.2689	water-rich phase
25	298.2	0.417	0.505 (a)	0.4255	0.3090	water-rich phase

Notes:
   ^a  Critical solubility point.

Method/Apparatus/Procedure:
   The methods 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 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 concentrations 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).