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IUPAC-NIST Solubility Database
NIST Standard Reference Database 106
Solubility System:
2-Methyl-2-propanol with p-Xylene and Water
Components:
(1) Water; H2O; [7732-18-5]
NIST Chemistry WebBook
for detail
(2) 2-Methyl-2-propanol (tert-butanol,tert-butyl alcohol); C4H10O; [75-65-0]
NIST Chemistry WebBook
for detail
(3) p-Xylene (1,4-dimethylbenzene, 1,4-xylene); C8H10; [106-42-3]
NIST Chemistry WebBook
for detail
Original Measurements:
Letcher, T.M.; Siswana, P.M.; van der Watt, P.; Radloff, S., J. Chem. Thermodyn. 21, 1053 (1989).
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
0.9997
0.000
0.998
25.0
298.2
0.051
0.947
0.070
0.915
25.0
298.2
0.099
0.895
0.133
0.837
25.0
298.2
0.197
0.788
0.243
0.680
25.0
298.2
0.291
0.679
0.327
0.533
25.0
298.2
0.380
0.569
0.385
0.403
25.0
298.2
0.460
0.459
0.412
0.287
25.0
298.2
0.526
0.350
0.411
0.191
25.0
298.2
0.564
0.243
0.369
0.111
25.0
298.2
0.572
0.143
0.310
0.054
25.0
298.2
0.509
0.075
0.224
0.023
25.0
298.2
0.430
0.045
0.164
0.012
25.0
298.2
0.342
0.021
0.115
0.005
25.0
298.2
0.148
0.015
0.041
0.003
25.0
298.2
0.000
0.000
0.000
0.000
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
0.529
0.092
0.246
0.030
hydrocarbon-rich phase
25.0
298.2
0.555
0.273
0.382
0.131
hydrocarbon-rich phase
25.0
298.2
0.447
0.477
0.409
0.305
hydrocarbon-rich phase
25.0
298.2
0.350
0.606
0.367
0.444
hydrocarbon-rich phase
25.0
298.2
0.298
0.670
0.332
0.522
hydrocarbon-rich phase
25.0
298.2
0.168
0.820
0.212
0.723
hydrocarbon-rich phase
25.0
298.2
0.355
0.037
0.123
0.009
water-rich phase
25.0
298.2
0.192
0.010
0.055
0.002
water-rich phase
25.0
298.2
0.112
0.005
0.030
0.001
water-rich phase
25.0
298.2
0.070
0.006
0.018
0.001
water-rich phase
25.0
298.2
0.059
0.000
0.015
0.000
water-rich phase
25.0
298.2
0.020
0.000
0.005
0.000
water-rich phase
Method/Apparatus/Procedure:
The titration method was used to determine binodal curve. A binary mixture of known composition was titrated with the third component until cloudiness was observed. Tie line compositions were related to the coexisting curve; water was determined by Karl Fischer titration. The methods were described in Ref. 1.
Source and Purity of Materials:
(1) Source not specified; used as received.
(2) Source not specified; recrystallized three times.
(3) Source not specified.
Estimated Errors:
Solubility: Not reported.
Temperature: Comp. <0.005 mole fraction (estimated authors' precision on binodal curve), <0.01 mole fraction (estimated authors' precision of tie lines).
References:
1
T. M. Letcher, S. Wootten, B. Shuttleworth, and C. Heyward, J. Chem Thermodyn. 18, 1037 (1986).