IUPAC-NIST Solubilities Database

IUPAC-NIST Solubility Database
NIST Standard Reference Database 106

Solubility System: Ethene with Benzene, 1, 4-dimethyl-, (p-xylene)

Components:
   (1) Ethene; C2H4; [74-85-1]  NIST Chemistry WebBook for detail
   (2) Benzene, 1, 4-dimethyl-, (p-xylene); C8H10; [106-42-3]  NIST Chemistry WebBook for detail

Original Measurements:
   Nakamura, E.; Koguchi, K.; Amemiya, T., Kogyo Kagaku Zasshi, 1966, 69, 42-47.

Variables:
   Temperature = 213.15 K to 303.15 K
   Pressure = 192.5 to 982.9 kPa (1.9 to 9.7 atm)

Prepared By:
   W. Hayduk

Experimental Remarks:

   The solvent vapor pressure was neglected.
An equation for Henry's constant was given: log₁₀ H = 3.71 to 561 (T/K)^–1

Experimental Data:   (Subscripts 1,2,3, ..., in column headings refer to components 1,2,3, ...)


t/°C	T/K	Temp Note	Pressure [kPa]	Pressure Note	Henry's law constant, K [atm (mole fraction)–1]	Henry Constant Note	Mole Fraction (x₁)
30.0	303.15	1	395.2	1	71.2	Average	0.050
30.0	303.15	1	395.2	1	71.2	Average	0.051
30.0	303.15	1	689.0	1	71.2	Average	0.091
30.0	303.15	1	689.0	1	71.2	Average	0.091
30.0	303.15	1	982.9	1	71.2	Average	0.132
20.0	293.15	1	395.2	1	62.8	Average	0.061
20.0	293.15	1	689.0	1	62.8	Average	0.106
20.0	293.15	1	982.9	1	62.8	Average	0.154
10.0	283.15	1	689.0	1	54.4	Average	0.125
10.0	283.15	1	982.9	1	54.4	Average	0.177
0.0	273.15	1, 2	395.2	1	46.9	Average	0.081
0.0	273.15	1, 2	689.0	1	46.9	Average	0.145
0.0	273.15	1, 2	982.9	1	46.9	Average	0.206
−21.2	251.95	1, 2	395.2	1	30.7	Average	0.130
−21.2	251.95	1, 2	689.0	1	30.7	Average	0.221
−21.2	251.95	1, 2	982.9	1	30.7	Average	0.311
−40.0	233.15	1, 2	192.5	1	19.6	Average	0.104
−40.0	233.15	1, 2	395.2	1	19.6	Average	0.197
−40.0	233.15	1, 2	689.0	1	19.6	Average	0.360

Notes:
   ¹  Calculated by compiler.
   ²  The solubility's at temperatures lower than the xylene freezing point were calculated from the data fro ethylbenzene-xylene mixtures given elsewhere in this volume.

Method/Apparatus/Procedure:
   For lower pressures a 200 cm³ graduated glass cell was used. Solvent was charged to 100 cm³; then the cell and contents were weighed. For degassing, ethene was pressured into the cell from a 170 cm³ ss bomb; then the cell was shaken, gas evacuated and cell recharged with ethene several times. After degassing, the cell contents were equilibrated at constant temperature and pressure for 3-4 h. After the volume of solution was measured, the sealed cell was placed in a desiccator and later weighed at room temperature. For higher pressures two cells, one glass the other ss, of identical volume were used simultaneously. The same procedure was used except that the solution volume was measured in the glass cell and the final mass in the ss cell. The glass tended to fail at high pressures.

Source and Purity of Materials:
   1. Ethene purity was 99.6%; the impurity consisted of 0.4% nitrogen.
   2. The 1,4-dimethylbenzene purity was 99.9% as checked by GC after drying using solid sodium.

Estimated Errors:
   Solubility: δx₁/x₁ = ± 0.02 (compiler)
   Temperature: δT/K = ± 0.1
   Pressure: δP/P = ± 0.01