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IUPAC-NIST Solubility Database
NIST Standard Reference Database 106
Solubility System:
2-Propanol with o-Xylene 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) o-Xylene (1,2-dimethylbenzene, 1,2-xylene); C8H10; [95-47-6]
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
0.005
0.091
0.001
25.0
298.2
0.346
0.013
0.139
0.003
25.0
298.2
0.431
0.043
0.195
0.011
25.0
298.2
0.493
0.104
0.260
0.031
25.0
298.2
0.501
0.214
0.319
0.077
25.0
298.2
0.477
0.317
0.356
0.134
25.0
298.2
0.433
0.434
0.386
0.219
25.0
298.2
0.367
0.551
0.386
0.328
25.0
298.2
0.287
0.668
0.351
0.463
25.0
298.2
0.196
0.782
0.274
0.620
25.0
298.2
0.099
0.893
0.158
0.804
25.0
298.2
0.050
0.947
0.084
0.899
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
0.027
0.970
0.046
0.938
hydrocarbon-rich phase
25.0
298.2
0.060
0.934
0.098
0.867
hydrocarbon-rich phase
25.0
298.2
0.217
0.754
0.293
0.577
hydrocarbon-rich phase
25.0
298.2
0.310
0.635
0.364
0.422
hydrocarbon-rich phase
25.0
298.2
0.440
0.416
0.381
0.204
hydrocarbon-rich phase
25.0
298.2
0.000
0.000
0.000
0.000
water-rich phase
25.0
298.2
0.238
0.005
0.086
0.001
water-rich phase
25.0
298.2
0.306
0.009
0.118
0.002
water-rich phase
25.0
298.2
0.443
0.053
0.206
0.014
water-rich phase
25.0
298.2
0.420
0.121
0.208
0.034
water-rich phase
25.0
298.2
0.501
0.243
0.335
0.092
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=0.781 51, n=1.3752.
(2) BDH; used as received; purity better than 99.6 mole % by glc; d=0.875 88, n=1.5029.
(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).