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IUPAC-NIST Solubility Database
NIST Standard Reference Database 106
Solubility System:
1-Butanol with Cyclohexane 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) Cyclohexane; C6H12; [110-82-7]
NIST Chemistry WebBook
for detail
Original Measurements:
Plackov, D.; Stern, I, Fluid. Phase Equilib. 57, 327 (1990).
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
25.00
298.15
0.0925
0.9049
0.1028
0.8853
25.00
298.15
0.1775
0.8125
0.1899
0.7657
25.00
298.15
0.2416
0.7439
0.2526
0.6851
25.00
298.15
0.2950
0.6851
0.3008
0.6153
25.00
298.15
0.3599
0.6124
0.3553
0.5324
25.00
298.15
0.4453
0.5159
0.4204
0.4290
25.00
298.15
0.4966
0.4566
0.4552
0.3686
25.00
298.15
0.5574
0.3829
0.4889
0.2958
25.00
298.15
0.6226
0.3027
0.5204
0.2228
25.00
298.15
0.6921
0.2081
0.5381
0.1425
25.00
298.15
0.7444
0.1268
0.5371
0.0806
25.00
298.15
0.7855
0.0435
0.5143
0.0251
25.00
298.15
0.0727
0.0000
0.0187
0.0000
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)
25.00
298.15
0.080
0.916
0.089
0.893
organic-rich phase
25.00
298.15
0.251
0.733
0.261
0.672
organic-rich phase
25.00
298.15
0.432
0.532
0.411
0.446
organic-rich phase
25.00
298.15
0.649
0.268
0.528
0.192
organic-rich phase
25.00
298.15
0.732
0.140
0.530
0.089
organic-rich phase
25.00
298.15
0.785
0.035
0.504
0.020
organic-rich phase
25.00
298.15
0.040
0.000
0.010
0.000
water-rich phase
25.00
298.15
0.048
0.000
0.012
0.000
water-rich phase
25.00
298.15
0.051
0.000
0.013
0.000
water-rich phase
25.00
298.15
0.059
0.000
0.015
0.000
water-rich phase
25.00
298.15
0.063
0.000
0.016
0.000
water-rich phase
25.00
298.15
0.070
0.000
0.018
0.000
water-rich phase
Method/Apparatus/Procedure:
The titration method, as reported in Ref. 1, was used to determine the solubility curve. Mixtures of known composition, mixed by means of a magnetic stirrer and placed in the thermostated double-wall Erlenmeyer flask, we titrated with the less soluble component until the appearance of turbidity. The analytical method was used to determine liquid-liquid equilibra. The mixture was shaken for at least 20 min. Equilibration took place in a thermostated double-walled separatory funnel of 250 mL over 2 h. The refractive index and density of both phases were measured. The composition was calculated numerically from the calibration data by polynomial regression analysis. The third order polynomials were used. Each experiment was repeated three times.
Source and Purity of Materials:
(1) Zorka (Sabac), analytical grade; used as received; n=1.3972, p(25°C)=805.9 kg m
-3
, b.p.=117.4°C.
(2) Kemika (Zagreb), analytical grade; used as received; n=1.4232, p(25°C)=773.6 kg m
-3
, b.p.=80.0°C.
(3) Double distilled in the presence of KMNO
4
.
Estimated Errors:
Solubility: Not reported.
Temperature: Temp. ±0.02°C; composition <±0.05% (by mass) relative error.
References:
1
E. R. Washburn, C. L. Graham, G. B. Arnold, and L. F. Transuel, J. Am. Chem. Soc. 62, 1454 (1940).