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IUPAC-NIST Solubility Database
NIST Standard Reference Database 106
Solubility System:
2-Methyl-1-propanol with Cyclohexane and Water
Components:
(1) Water; H2O; [7732-18-5]
NIST Chemistry WebBook
for detail
(2) 2-Methyl-1-propanol (isobutyl alcohol); C4H10O; [78-83-1]
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
0.081
0.000
0.021
0.000
25.0
298.2
0.832
0.000
0.546
0.000
25.0
298.2
0.827
0.015
0.555
0.009
25.0
298.2
0.803
0.067
0.574
0.042
25.0
298.2
0.729
0.181
0.579
0.127
25.0
298.2
0.654
0.281
0.558
0.211
25.0
298.2
0.571
0.381
0.517
0.304
25.0
298.2
0.483
0.483
0.460
0.405
25.0
298.2
0.391
0.585
0.389
0.513
25.0
298.2
0.295
0.689
0.306
0.629
25.0
298.2
0.198
0.794
0.213
0.752
25.0
298.2
0.099
0.897
0.110
0.874
25.0
298.2
0.049
0.949
0.055
0.937
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
0.832
0.000
0.546
0.000
hydrocarbon-rich phase
25.0
298.2
0.764
0.129
0.580
0.086
hydrocarbon-rich phase
25.0
298.2
0.492
0.473
0.467
0.395
hydrocarbon-rich phase
25.0
298.2
0.323
0.658
0.330
0.592
hydrocarbon-rich phase
25.0
298.2
0.081
0.000
0.021
0.000
water-rich phase
25.0
298.2
0.070
0.000
0.018
0.000
water-rich phase
25.0
298.2
0.055
0.000
0.014
0.000
water-rich phase
25.0
298.2
0.028
0.000
0.007
0.000
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) Marck; AR grade; dried by addition of anhydrous K
2
CO
3
, 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).