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IUPAC-NIST Solubility Database
NIST Standard Reference Database 106
Solubility System:
1-Proponal with Cyclohexane 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) Cyclohexane; C6H12; [110-82-7]
NIST Chemistry WebBook
for detail
Original Measurements:
Letcher, T.M.; Siswana, P.; Radloff, S.E., S. Afr. J. Chem. 44, 118 (1991).
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 w
1
(compiler)
Mass Fraction w
2
(compiler)
Mole Fraction x
1
Mole Fraction x
2
25.0
298.2
0.000
0.000
0.000
0.000
25.0
298.2
0.200
0.004
0.070
0.001
25.0
298.2
0.295
0.015
0.113
0.004
25.0
298.2
0.386
0.036
0.165
0.011
25.0
298.2
0.475
0.058
0.229
0.020
25.0
298.2
0.570
0.138
0.347
0.060
25.0
298.2
0.575
0.227
0.412
0.116
25.0
298.2
0.528
0.344
0.440
0.205
25.0
298.2
0.462
0.451
0.430
0.300
25.0
298.2
0.382
0.562
0.393
0.413
25.0
298.2
0.293
0.673
0.330
0.542
25.0
298.2
0.200
0.784
0.246
0.688
25.0
298.2
0.100
0.896
0.132
0.847
25.0
298.2
0.050
0.948
0.068
0.922
25.0
298.2
0.0000
0.9998
0.000
0.999
Compositions of coexisting phases
t/°C
T/K
Mass Fraction w
1
(compiler)
Mass Fraction w
2
(compiler)
Mole Fraction x
1
Mole Fraction x
2
Comment(s)
25.0
298.2
0.348
0.604
0.371
0.460
hydrocarbon-rich phase
25.0
298.2
0.461
0.452
0.429
0.300
hydrocarbon-rich phase
25.0
298.2
0.519
0.360
0.440
0.218
hydrocarbon-rich phase
25.0
298.2
0.566
0.261
0.426
0.140
hydrocarbon-rich phase
25.0
298.2
0.581
0.140
0.360
0.062
hydrocarbon-rich phase
25.0
298.2
0.178
0.004
0.061
0.001
water-rich phase
25.0
298.2
0.250
0.011
0.092
0.003
water-rich phase
25.0
298.2
0.267
0.015
0.100
0.004
water-rich phase
25.0
298.2
0.309
0.021
0.121
0.006
water-rich phase
25.0
298.2
0.378
0.033
0.160
0.010
water-rich phase
Method/Apparatus/Procedure:
The points on the binodal curve were determined by the titration method, as described in Ref. 1. The formation of a cloudy mixture was observed visually on shaking after addition of a known mass of the third component; syringes were precisely weighed. Tie line compositions were determined by the refractive index method
2
, and a complementary method using the Karl Fischer titration
3
. Measurements were made at pressure of 94.7 kPa.
Source and Purity of Materials:
(1) Merck; AR grade; refluxed with Mg and I
2
, distilled; purity >99.9 mole % by glc.
(2) BDH; Gold label grade; used as received; purity >99.9 mole % by glc.
(3) Source not specified.
Estimated Errors:
Solubility: Not reported.
Temperature: Composition ±0.005 mole fraction (binodal curve), ±0.01 mole fraction (tie lines).
References:
1
T. M. Letcher, S. Wootten, B. Shuttleworth, and C. Heyward, J. Chem. Thermodyn. 18, 1037 (1986).
2
S. W. Briggs and E. W. Comings, Ind. Eng. Chem. 35, 411 (1943).
3
T. M. Letcher, P. Siswana, P. van der Watt, and S. Radloff, J. Chem. Thermodyn. 21, 1053 (1989).