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IUPAC-NIST Solubility Database
NIST Standard Reference Database 106
Solubility System:
2-Butanol with Cyclohexene 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) 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
25.0
298.15
0.0698
0.9279
0.0779
0.9118
25.0
298.15
0.1473
0.8476
0.1610
0.8160
25.0
298.15
0.2044
0.7858
0.2181
0.7386
25.0
298.15
0.2629
0.7209
0.2727
0.6585
25.0
298.15
0.3342
0.6423
0.3354
0.5677
25.0
298.15
0.4108
0.5545
0.3943
0.4688
25.0
298.15
0.4899
0.4600
0.4450
0.3680
25.0
298.15
0.5620
0.3701
0.4815
0.2793
25.0
298.15
0.6306
0.2769
0.5025
0.1943
25.0
298.15
0.6895
0.1817
0.4998
0.1160
25.0
298.15
0.7228
0.0894
0.4591
0.0500
25.0
298.15
0.7081
0.0312
0.3916
0.0152
25.0
298.15
0.1914
0.0000
0.0544
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
0.036
0.962
0.041
0.952
organic-rich phase
25.00
298.15
0.164
0.829
0.177
0.789
organic-rich phase
25.00
298.15
0.301
0.681
0.309
0.615
organic-rich phase
25.00
298.15
0.371
0.601
0.366
0.522
organic-rich phase
25.00
298.15
0.475
0.476
0.433
0.382
organic-rich phase
25.00
298.15
0.559
0.369
0.475
0.276
organic-rich phase
25.00
298.15
0.637
0.266
0.502
0.185
organic-rich phase
25.00
298.15
0.714
0.111
0.466
0.064
organic-rich phase
25.00
298.15
0.070
0.000
0.018
0.000
water-rich phase
25.00
298.15
0.092
0.000
0.024
0.000
water-rich phase
25.00
298.15
0.099
0.000
0.026
0.000
water-rich phase
25.00
298.15
0.102
0.000
0.027
0.000
water-rich phase
25.00
298.15
0.133
0.000
0.036
0.000
water-rich phase
25.00
298.15
0.140
0.000
0.038
0.000
water-rich phase
25.00
298.15
0.143
0.000
0.039
0.000
water-rich phase
25.00
298.15
0.153
0.000
0.042
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) Merck, analytical grade; used as received; n=1.3943, p(25°C)=802.5 kg m
-3
, b.p.=99.3°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).