IUPAC-NIST Solubility Database
NIST Standard Reference Database 106

Glass Ball as Bullet Solubility System: 1-Proponal with Benzene and Water

   (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.

   Temperature = 311 K

Prepared By:
   A. Skrzecz

Experimental Data:   (Notes on the Nomenclature)
Compositions along the saturation curve
t/°CT/KMass Fraction w1Mass Fraction w2Mole Fraction x1 (compiler)Mole Fraction x2 (compiler)
Compositions of coexisting phases
t/°CT/KMass Fraction w1Mass Fraction w2Mole Fraction x1 (compiler)Mole Fraction x2 (compiler)Comment(s)
100310.90.0390.9580.04960.9377hydrocarbon-rich phase
100310.90.0910.9000.1190.8512hydrocarbon-rich phase
100310.90.1500.8360.17860.7658hydrocarbon-rich phase
100310.90.3220.6240.32780.4888hydrocarbon-rich phase
100310.90.4210.4910.38540.3458hydrocarbon-rich phase
100310.90.0800.9120.09900.8680hydrocarbon-rich phase
100310.90.0600.0030.01880.0007water-rich phase
100310.90.0790.006 a)0.02520.0015water-rich phase
100310.90.1040.007 b)0.03380.0018water-rich phase
100310.90.1400.010 a)0.04690.0026water-rich phase
100310.90.1650.010 b)0.05640.0026water-rich phase
100310.90.0900.007 a)0.02900.0017water-rich phase
   a  See Method.
   b  See Method.

   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).

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