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IUPAC-NIST Solubility Database
NIST Standard Reference Database 106
Solubility System:
1-Proponal with Toluene 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) Toluene (methylbenzene); C7H8; [108-88-3]
NIST Chemistry WebBook
for detail
Original Measurements:
Letcher, T.M.; Siswana, P.M., Fluid Phase Equilib. 74, 203 (1992).
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
0.249
0.004
0.091
0.001
25.0
298.2
0.343
0.019
0.138
0.005
25.0
298.2
0.428
0.047
0.194
0.014
25.0
298.2
0.499
0.092
0.259
0.031
25.0
298.2
0.541
0.143
0.320
0.055
25.0
298.2
0.554
0.249
0.403
0.118
25.0
298.2
0.518
0.342
0.429
0.185
25.0
298.2
0.457
0.457
0.438
0.286
25.0
298.2
0.364
0.585
0.397
0.416
25.0
298.2
0.285
0.688
0.346
0.544
25.0
298.2
0.188
0.800
0.252
0.698
25.0
298.2
0.100
0.896
0.143
0.836
25.0
298.2
0.050
0.949
0.074
0.920
25.0
298.2
0.000
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
0.000
0.9998
0.000
0.999
hydrogen-rich phase
25.0
298.2
0.250
0.730
0.315
0.600
hydrogen-rich phase
25.0
298.2
0.317
0.647
0.368
0.490
hydrogen-rich phase
25.0
298.2
0.395
0.540
0.410
0.365
hydrogen-rich phase
25.0
298.2
0.460
0.443
0.430
0.270
hydrogen-rich phase
25.0
298.2
0.519
0.339
0.428
0.182
hydrogen-rich phase
25.0
298.2
0.554
0.222
0.383
0.100
hydrogen-rich phase
25.0
298.2
0.521
0.121
0.290
0.044
hydrogen-rich phase
25.0
298.2
0.000
0.000
0.000
0.000
water-rich phase
25.0
298.2
0.147
0.000
0.049
0.000
water-rich phase
25.0
298.2
0.168
0.000
0.057
0.000
water-rich phase
25.0
298.2
0.186
0.000
0.064
0.000
water-rich phase
25.0
298.2
0.206
0.000
0.072
0.000
water-rich phase
25.0
298.2
0.225
0.000
0.080
0.000
water-rich phase
25.0
298.2
0.258
0.004
0.095
0.001
water-rich phase
25.0
298.2
0.340
0.008
0.135
0.002
water-rich phase
Method/Apparatus/Procedure:
The points on the binodal curve were determined by the formation of a cloudy mixture on shaking after the addition of a known mass of one component to a mixture of known masses of the other two components. Precision weighing syringes were used as described by the refractive index method reported in Ref. 2 and a complementary method using the Karl Fischer titrations as reported in Ref. 3.
Source and Purity of Materials:
(1) Merck, AR grade; distilled, dried by refluxing with Mg and I
2
; purity better than 99.6 mole % by glc; d=0.79979, n=1.3837.
(2) BDH; used as received; purity better than 99.6 mole % by glc.
(3) Source not specified.
Estimated Errors:
Solubility: Not reported.
Temperature: Estimated comp. 0.005 mole fraction on the binodal curve and 0.01 mole fraction for tie lines (estimated by the authors).
References:
1
T. M. Letcher, S. Wootten, B. Shuttleworth, and C. Heward, 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. M. Siswana, P. Van der Watt, and S. Radloff, J. Chem. Thermodyn. 21, 1053 (1989).