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IUPAC-NIST Solubility Database
NIST Standard Reference Database 106
Solubility System:
Ethanol with Decahydronaphthalene (cis + trans) (decalin, bicyclo[4.4.0]decane) and Water
Components:
(1) Water; H2O; [7732-18-5]
NIST Chemistry WebBook
for detail
(2) Decahydronaphthalene (cis+ trans) (decalin, bicyclo [4.4.0]decane); C10H18; [91-17-8]
NIST Chemistry WebBook
for detail
(3) Ethanol (ethyl alcohol); C2H6O; [64-17-5]
NIST Chemistry WebBook
for detail
Original Measurements:
Ruiz, F.; Gomis, V.; Botella, R.F., Fluid Phase Equilib. 43, 317-27 (1988).
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
Mass Fraction w
2
Mole Fraction x
1
(compiler)
Mole Fraction x
2
(compiler)
25
298.2
0.491
0.500
0.7214
0.2448
25
298.2
0.600
0.385
0.7826
0.1673
25
298.2
0.667
0.307
0.7981
0.1224
25
298.2
0.722
0.238
0.7990
0.0878
25
298.2
0.773
0.148
0.7546
0.0481
25
298.2
0.783
0.104
0.7076
0.0313
25
298.2
0.750
0.039
0.5758
0.0100
25
298.2
0.718
0.024
0.5181
0.0058
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
0.003
0.999
0.0009
0.9938
hydrocarbon-rich phase
25.0
298.2
0.0017
0.998
0.0051
0.9926
hydrocarbon-rich phase
25.0
298.2
0.0023
0.998
0.0072
0.9928
hydrocarbon-rich phase
25.0
298.2
0.0035
0.997
0.0104
0.9896
hydrocarbon-rich phase
25.0
298.2
0.0041
0.996
0.0122
0.9878
hydrocarbon-rich phase
25.0
298.2
0.0046
0.995
0.0136
0.9833
hydrocarbon-rich phase
25.0
298.2
0.0058
0.994
0.0172
0.9813
hydrocarbon-rich phase
25.0
298.2
0.0061
0.994
0.0181
0.9819
hydrocarbon-rich phase
25.0
298.2
0.0063
0.994
0.0187
0.9813
hydrocarbon-rich phase
25.0
298.2
0.0066
0.993
0.0195
0.9775
hydrocarbon-rich phase
25.0
298.2
0.0077
0.992
0.0227
0.9750
hydrocarbon-rich phase
25.0
298.2
0.0089
0.991
0.0262
0.9730
hydrocarbon-rich phase
25.0
298.2
0.0110
0.989
0.0323
0.9677
hydrocarbon-rich phase
25.0
298.2
0.0125
0.988
0.0366
0.9634
hydrocarbon-rich phase
25.0
298.2
0.1018
0.0 (a)
0.04244
0.0
water-rich phase
25.0
298.2
0.186
0.00008
0.082023
0.000012
water-rich phase
25.0
298.2
0.262
0.00022
0.121932
0.000034
water-rich phase
25.0
298.2
0.332
0.00028
0.162777
0.000046
water-rich phase
25.0
298.2
0.396
0.00073
0.204236
0.000125
water-rich phase
25.0
298.2
0.457
0.0015
0.24807
0.00027
water-rich phase
25.0
298.2
0.517
0.0031
0.29623
0.00059
water-rich phase
25.0
298.2
0.563
0.0055
0.33748
0.00110
water-rich phase
25.0
298.2
0.613
0.0089
0.38728
0.00187
water-rich phase
25.0
298.2
0.659
0.0144
0.43963
0.00320
water-rich phase
25.0
298.2
0.694
0.0209
0.48531
0.00487
water-rich phase
25.0
298.2
0.725
0.0310
0.53337
0.00760
water-rich phase
25.0
298.2
0.758
0.0449
0.59358
0.01172
water-rich phase
25.0
298.2
0.773
0.0609
0.63462
0.01666
water-rich phase
Notes:
a
No detectable composition of decalin.
Method/Apparatus/Procedure:
The cloud point method was used to determine the solubility curve. The experimental apparatus was described in Ref. 1. The analytical method was used to determine liquid-liquid equilibra. Mixtures of known overall composition, by weight, were stirred intensely and allowed to settle for 2 h at constant temperature bath. Samples of each phase were taken and analyzed by glc method with 1-propanol as internal standard. (1-propanol also prevented phase separation.) Analytical conditions: column 2m x 3mm, packed with Chromosorb 101 100/120, temp. 190°C, thermal conductivity detector for the organic phase, flame ionization detector for aqueous phase, helium flow rate -40mL/min. Water was reported to be undetectable in the organic phase.
Source and Purity of Materials:
(1) Merck; used as received; <0.2 wt % impurities by glc.
(2) Merck; used as received; mixture of cis- and trans-isomers.
(3) Source not reported.
Estimated Errors:
Solubility: Not reported.
Temperature: Temp. ±0.1°C; relative accuracy of composition 2% (solubility curve).
References:
1
F. Ruiz and D. Prats, Fluid Phase Equilib. 10, 77 (1983).