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IUPAC-NIST Solubility Database
NIST Standard Reference Database 106
Solubility System:
2-Propanol with Cyclohexane 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) 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
0.348
0.014
0.140
0.004
25.0
298.2
0.439
0.034
0.198
0.011
25.0
298.2
0.528
0.070
0.275
0.026
25.0
298.2
0.549
0.119
0.315
0.049
25.0
298.2
0.552
0.203
0.365
0.096
25.0
298.2
0.505
0.330
0.392
0.183
25.0
298.2
0.446
0.444
0.394
0.280
25.0
298.2
0.372
0.558
0.370
0.396
25.0
298.2
0.288
0.673
0.320
0.534
25.0
298.2
0.196
0.786
0.240
0.688
25.0
298.2
0.099
0.896
0.131
0.846
25.0
298.2
0.050
0.948
0.068
0.923
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
0.107
0.886
0.141
0.830
hydrocarbon-rich phase
25.0
298.2
0.161
0.827
0.203
0.746
hydrocarbon-rich phase
25.0
298.2
0.202
0.780
0.247
0.680
hydrocarbon-rich phase
25.0
298.2
0.253
0.717
0.292
0.592
hydrocarbon-rich phase
25.0
298.2
0.349
0.591
0.359
0.435
hydrocarbon-rich phase
25.0
298.2
0.396
0.525
0.382
0.362
hydrocarbon-rich phase
25.0
298.2
0.350
0.014
0.141
0.004
water-rich phase
25.0
298.2
0.445
0.037
0.202
0.012
water-rich phase
25.0
298.2
0.496
0.059
0.245
0.021
water-rich phase
25.0
298.2
0.539
0.083
0.290
0.032
water-rich phase
25.0
298.2
0.548
0.193
0.354
0.089
water-rich phase
25.0
298.2
0.541
0.242
0.376
0.120
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; refluzed 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 F. W. Comings, Ind. Eng. Chem. 35, 411 (1993).
3
T. M. Letcher, P. Siswana, P. van der Watt, and S. Radloff, J. Chem. Thermodyn. 21, 1053 (1989).