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IUPAC-NIST Solubility Database
NIST Standard Reference Database 106
Solubility System:
2-Propanol with Toluene and Water
Components:
(1) Water; H2O; [7732-18-5]
NIST Chemistry WebBook
for detail
(2) 2-Propanol (isopropanol, isopropyl alcohol); C3H8O; [67-63-0]
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
0.421
0.064
0.193
0.019
25.0
298.2
0.473
0.139
0.255
0.049
25.0
298.2
0.488
0.208
0.298
0.083
25.0
298.2
0.479
0.320
0.353
0.154
25.0
298.2
0.435
0.436
0.378
0.247
25.0
298.2
0.369
0.552
0.371
0.362
25.0
298.2
0.287
0.668
0.329
0.500
25.0
298.2
0.196
0.782
0.252
0.656
25.0
298.2
0.099
0.896
0.142
0.834
25.0
298.2
0.049
0.949
0.073
0.918
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
hydrocarbon-rich phase
25.0
298.2
0.291
0.661
0.330
0.488
hydrocarbon-rich phase
25.0
298.2
0.342
0.591
0.360
0.405
hydrocarbon-rich phase
25.0
298.2
0.403
0.496
0.380
0.305
hydrocarbon-rich phase
25.0
298.2
0.440
0.426
0.377
0.238
hydrocarbon-rich phase
25.0
298.2
0.477
0.321
0.351
0.154
hydrocarbon-rich phase
25.0
298.2
0.000
0.000
0.000
0.000
water-rich phase
25.0
298.2
0.315
0.031
0.125
0.008
water-rich phase
25.0
298.2
0.360
0.037
0.150
0.010
water-rich phase
25.0
298.2
0.392
0.042
0.170
0.012
water-rich phase
25.0
298.2
0.423
0.054
0.192
0.016
water-rich phase
25.0
298.2
0.462
0.092
0.230
0.030
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 in Ref. 1. Tie line compositions were determined by the refractive index method reported in Ref. 2 and 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=0.781 51, n=1.3752.
(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. 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. M. Siswana, P. Van der Watt, and S. Radloff, J. Chem. Thermodyn. 21, 1053 (1989).