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IUPAC-NIST Solubility Database
NIST Standard Reference Database 106
Solubility System:
2-Butanol with p-Xylene and Water
Components:
(1) Water; H2O; [7732-18-5]
NIST Chemistry WebBook
for detail
(2) 2-Butanol (sec-butanol, sec-butyl alcohol, (RS)-2-butanol, dl-2-butanol, DL-2-butanol); C4H10O; [78-92-2]
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
0.916
25.0
298.2
0.100
0.896
0.134
0.842
25.0
298.2
0.198
0.791
0.248
0.693
25.0
298.2
0.294
0.685
0.341
0.555
25.0
298.2
0.386
0.578
0.412
0.431
25.0
298.2
0.474
0.473
0.462
0.322
25.0
298.2
0.554
0.371
0.494
0.231
25.0
298.2
0.627
0.268
0.503
0.150
25.0
298.2
0.683
0.171
0.486
0.085
25.0
298.2
0.712
0.052
0.414
0.021
25.0
298.2
0.689
0.016
0.360
0.006
25.0
298.2
0.666
0.006
0.330
0.002
25.0
298.2
0.661
0.000
0.322
0.000
25.0
298.2
0.181
0.000
0.051
0.000
Compositions of coexisting phases
t/°C
T/K
Mass Fraction w
1
Mass Fraction w
2
Mole Fraction x
1
Mole Fraction x
2
Comment(s)
25.0
298.2
0.661
0.000
0.322
0.000
organic-rich phase
25.0
298.2
0.552
0.371
0.490
0.230
organic-rich phase
25.0
298.2
0.348
0.622
0.385
0.480
organic-rich phase
25.0
298.2
0.097
0.898
0.130
0.843
organic-rich phase
25.0
298.2
0.000
0.9997
0.000
0.998
organic-rich phase
25.0
298.2
0.181
0.000
0.051
0.000
water-rich phase
25.0
298.2
0.146
0.000
0.040
0.000
water-rich phase
25.0
298.2
0.099
0.000
0.026
0.000
water-rich phase
25.0
298.2
0.059
0.000
0.015
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 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).