IUPAC-NIST Solubilities Database

IUPAC-NIST Solubility Database
NIST Standard Reference Database 106

Solubility System: 1-Proponal with Benzene 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) Benzene; C6H6; [71-43-2]  NIST Chemistry WebBook for detail

Original Measurements:
   McCants, J.F.; Jones, J.H.; Hopson, W.H., Ind. Eng. Chem. 1953, 45, 454-6.

Variables:
   Temperature = 311 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)
100	310.9	0.000	0.997	0.0000	0.9871
100	310.9	0.259	0.705	0.2811	0.5886
100	310.9	0.331	0.603	0.3261	0.4570
100	310.9	0.434	0.473	0.3917	0.3284
100	310.9	0.544	0.270	0.3964	0.1514
100	310.9	0.557	0.202	0.3673	0.1025
100	310.9	0.514	0.113	0.2786	0.0471
100	310.9	0.460	0.083	0.2246	0.0312
100	310.9	0.390	0.057	0.1712	0.0192
100	310.9	0.238	0.017	0.0870	0.0048
100	310.9	0.000	0.005	0.0000	0.0012

Compositions of coexisting phases
t/°C	T/K	Mass Fraction w₁	Mass Fraction w₂	Mole Fraction x₁ (compiler)	Mole Fraction x₂ (compiler)	Comment(s)
100	310.9	0.039	0.958	0.0496	0.9377	hydrocarbon-rich phase
100	310.9	0.091	0.900	0.119	0.8512	hydrocarbon-rich phase
100	310.9	0.150	0.836	0.1786	0.7658	hydrocarbon-rich phase
100	310.9	0.322	0.624	0.3278	0.4888	hydrocarbon-rich phase
100	310.9	0.421	0.491	0.3854	0.3458	hydrocarbon-rich phase
100	310.9	0.080	0.912	0.0990	0.8680	hydrocarbon-rich phase
100	310.9	0.060	0.003	0.0188	0.0007	water-rich phase
100	310.9	0.079	0.006 a)	0.0252	0.0015	water-rich phase
100	310.9	0.104	0.007 b)	0.0338	0.0018	water-rich phase
100	310.9	0.140	0.010 a)	0.0469	0.0026	water-rich phase
100	310.9	0.165	0.010 b)	0.0564	0.0026	water-rich phase
100	310.9	0.090	0.007 a)	0.0290	0.0017	water-rich phase

Notes:
   ^a  See Method.
   ^b  See Method.

Method/Apparatus/Procedure:
   The titration method was used to obtain binodal curve. The samples of homogeneous binary mixture were placed in a constant temperature bath and titrated the third component to the cloud point. Each sample was agitated in the constant temperature bath for several minutes between drops of the third component. The temperatures of these systems were raised slightly (1°F) to obtain homogeneity and their refractive indexes were measured. The analytical method was used for tie lines. (a) A ternary mixture of known composition was shaken for several hours in constant temperature bath and after both phases were carefully seperated and their refractive indexes were determined. The intersections of the tie lines with the binodal curve were determined by refractive index interpolation between points of known composition used to determine the curve.

(b) The slopes of the tie lines were checked by determining tie lines by the graphical application of the lever rule as described in Ref. 1.

Source and Purity of Materials:
   (1) Du Pont, refined; used as received; n(20°C,D)=1.3855, d(75°F,60°F)=0.800.
   (2) Baker, thiophene free; used as received; n(20°C,D)=1.5004, d(75°F,60°F)=0.873
   (3) Distilled; n(20°C,D)=1.3330.

Estimated Errors:
   Solubility: Not reported.
   Temperature: refractive index ±0.0001; concentration ±0.001 mass % (estimated by compiler).

References:
   ¹ D. F. Othmer and P. E. Tobias, Ind. Eng. Chem. 34, 690 (1942).