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IUPAC-NIST Solubility Database
NIST Standard Reference Database 106
Solubility System:
2-Methyl-1-propanol with p-Xylene 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) 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
0.050
0.948
0.069
0.916
25.0
298.2
0.100
0.896
0.135
0.843
25.0
298.2
0.198
0.791
0.249
0.695
25.0
298.2
0.295
0.686
0.345
0.561
25.0
298.2
0.387
0.583
0.422
0.444
25.0
298.2
0.565
0.377
0.530
0.247
25.0
298.2
0.646
0.277
0.558
0.167
25.0
298.2
0.714
0.188
0.571
0.105
25.0
298.2
0.830
0.023
0.572
0.011
25.0
298.2
0.833
0.000
0.548
0.000
25.0
298.2
0.081
0.000
0.021
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
0.833
0.000
0.548
0.000
organic-rich phase
25.0
298.2
0.529
0.419
0.510
0.282
organic-rich phase
25.0
298.2
0.205
0.784
0.257
0.685
organic-rich phase
25.0
298.2
0.000
0.9997
0.000
0.998
organic-rich phase
25.0
298.2
0.081
0.000
0.021
0.000
water-rich phase
25.0
298.2
0.055
0.000
0.014
0.000
water-rich phase
25.0
298.2
0.032
0.000
0.008
0.000
water-rich phase
25.0
298.2
0.000
0.000
0.000
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 coexistence curve; water was determined by the 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).