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IUPAC-NIST Solubility Database
NIST Standard Reference Database 106
Solubility System:
Ethene with Hexane and Dodecane
Components:
(1) Ethene; C2H4; [74-85-1]
NIST Chemistry WebBook
for detail
(2) Hexane; C6H14; [110-54-3]
NIST Chemistry WebBook
for detail
(3) Dodecane; C12H26; [112-40-3]
NIST Chemistry WebBook
for detail
Original Measurements:
Sahgal, A.; Hayduk, W., J. Chem. Eng. Data 1979, 24, 222-227.
Variables:
Temperature = 298.15 K
Pressure = 101.325 kPa
Prepared By:
W. Hayduk
Experimental Remarks:
Values for pure solvents were previously given (in Ref. 1).
Experimental Data:
(Subscripts 1,2,3, ..., in column headings refer to components 1,2,3, ...)
t/°C
T/K
Mole Fraction (x
1
)
Mole Fraction (x
3
)
x
3
Note
Volume Note
Volume Fraction Phase
a
25
298.15
0.0207
0
2
1
0 (Hexane)
25
298.15
0.0207
0.155
2
1
0.241
25
298.15
0.0206
0.261
2
1
0.380
25
298.15
0.0205
0.296
2
1
0.422
25
298.15
0.0206
0.367
2
1
0.502
25
298.15
0.0205
0.442
2
1
0.578
25
298.15
0.0207
0.722
2
1
0.821
25
298.15
0.0214
0.871
2
1
0.922
25
298.15
0.0216
1.000
2
1
1.0 (Dodecane)
Notes:
1
Volume fraction is based on volumes of two liquid components before mixing.
2
Mole fraction is shown on a gas-free basis.
Method/Apparatus/Procedure:
The apparatus utilized a continuous flow of deaerated solvent injected into a glass absorption spiral tube by means of a calibrated syringe pump. The mixed solvent was prepared volumetrically then deaerated and a sample analyzed by a density measurement. A mercury lift device was used for continuously adjusting the residual volume at constant pressure in a gas storage burette. Solvent injection and gas consumption rates were used to calculate solubilities. This paper also includes solution densities and refractive indices as well as ethene molecular diffusivities in the solutions.
Source and Purity of Materials:
1. Ethene was CP grade from Matheson with minimum purity of 99.5 mole %. Molar volume used at 298.15 K and 101.325 kPa was 24, 326 cm
3
/mole.
2. Hexane was from Fisher; purity 99.0 mole %.
3. Dodecane was research grade from Phillips Petroleum, 99.0 mole % purity.
Estimated Errors:
Solubility: δ
z
3
= ± 0.001
δx
1
/x
1
= ± 0.02
Temperature: δ
T/
K = ± 0.05
Pressure: δ
P
/
P
= ± 0.01
References:
1. Sahgal, A.; La, H.M.; Hayduk, W., Can. J. Chem. Eng. 1978, 56, 354.