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IUPAC-NIST Solubility Database
NIST Standard Reference Database 106
Solubility System:
1-Butanol with Toluene and Water
Components:
(1) Water; H2O; [7732-18-5]
NIST Chemistry WebBook
for detail
(2) 1-Butanol (n-butanol, butyl alcohol, n-butyl alcohol); C4H10O; [71-36-3]
NIST Chemistry WebBook
for detail
(3) Toluene (methylbenzene); C7H8; [108-88-3]
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
0.074
0.000
0.019
0.000
25.0
298.2
0.797
0.000
0.488
0.000
25.0
298.2
0.778
0.063
0.524
0.034
25.0
298.2
0.765
0.085
0.527
0.047
25.0
298.2
0.714
0.178
0.548
0.110
25.0
298.2
0.638
0.282
0.534
0.190
25.0
298.2
0.564
0.376
0.506
0.271
25.0
298.2
0.479
0.479
0.462
0.372
25.0
298.2
0.388
0.583
0.398
0.481
25.0
298.2
0.295
0.688
0.322
0.603
25.0
298.2
0.198
0.792
0.225
0.725
25.0
298.2
0.099
0.896
0.118
0.858
25.0
298.2
0.049
0.948
0.060
0.928
25.0
298.2
0.000
0.9998
0.000
0.999
Compositions of coexisting phases
t/°C
T/K
Mass Fraction w
1
Mass Fraction w
2
Mole Fraction x
1
(compiler)
Mole Fraction x
2
(compiler)
Comment(s)
25.0
298.2
0.000
0.9998
0.000
0.999
organic-rich phase
25.0
298.2
0.318
0.661
0.341
0.570
organic-rich phase
25.0
298.2
0.469
0.490
0.455
0.382
organic-rich phase
25.0
298.2
0.729
0.151
0.542
0.090
organic-rich phase
25.0
298.2
0.797
0.000
0.488
0.000
organic-rich phase
25.0
298.2
0.000
0.000
0.000
0.000
water-rich phase
25.0
298.2
0.028
0.000
0.007
0.000
water-rich phase
25.0
298.2
0.048
0.000
0.012
0.000
water-rich phase
25.0
298.2
0.063
0.000
0.016
0.000
water-rich phase
25.0
298.2
0.074
0.000
0.019
0.000
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).