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IUPAC-NIST Solubility Database
NIST Standard Reference Database 106
Solubility System:
2-Methyl-2-propanol with 1-Heptene and Water
Components:
(1) Water; H2O; [7732-18-5]
NIST Chemistry WebBook
for detail
(2) 1-Heptene; C7H14; [592-76-7]
NIST Chemistry WebBook
for detail
(3) 2-Methyl-2-propanol (tert-butanol,tert-butyl alcohol); C4H10O; [75-65-0]
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
0.198
0.009
0.057
0.002
25.0
298.2
0.386
0.035
0.138
0.010
25.0
298.2
0.467
0.064
0.191
0.021
25.0
298.2
0.540
0.099
0.257
0.038
25.0
298.2
0.571
0.143
0.307
0.062
25.0
298.2
0.572
0.244
0.375
0.129
25.0
298.2
0.541
0.336
0.411
0.205
25.0
298.2
0.456
0.462
0.391
0.319
25.0
298.2
0.380
0.570
0.363
0.438
25.0
298.2
0.291
0.680
0.305
0.573
25.0
298.2
0.197
0.787
0.220
0.707
25.0
298.2
0.098
0.896
0.116
0.855
25.0
298.2
0.049
0.948
0.060
0.928
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
0.565
0.090
0.275
0.033
hydrocarbon-rich phase
25.0
298.2
0.604
0.158
0.355
0.070
hydrocarbon-rich phase
25.0
298.2
0.594
0.229
0.398
0.116
hydrocarbon-rich phase
25.0
298.2
0.524
0.383
0.437
0.241
hydrocarbon-rich phase
25.0
298.2
0.405
0.554
0.409
0.422
hydrocarbon-rich phase
25.0
298.2
0.309
0.671
0.345
0.565
hydrocarbon-rich phase
25.0
298.2
0.119
0.005
0.032
0.001
water-rich phase
25.0
298.2
0.162
0.005
0.045
0.001
water-rich phase
25.0
298.2
0.192
0.009
0.055
0.002
water-rich phase
25.0
298.2
0.245
0.013
0.074
0.003
water-rich phase
25.0
298.2
0.321
0.016
0.105
0.004
water-rich phase
25.0
298.2
0.385
0.019
0.135
0.005
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 the addition of anhydrous potassium carbonate, distilled; purity better than 99.6 mole % by glc.
(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).