IUPAC-NIST Solubilities Database

IUPAC-NIST Solubility Database
NIST Standard Reference Database 106

Solubility System: Ethene with Benzene, 1, 2-dimethyl-, (o-xylene) and Ethylbenzene

Components:
   (1) Ethene; C2H4; [74-85-1]  NIST Chemistry WebBook for detail
   (2) Ethylbenzene; C8H10; [100-41-4]  NIST Chemistry WebBook for detail
   (3) Benzene, 1, 2-dimethyl-, (o-xylene); C8H10; [95-47-6]  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 233.15 K
   Pressure = 182.4 to 689.0 kPa(1.8 to 6.8 atm)

Prepared By:
   W. Hayduk

Experimental Remarks:

   The purpose of these low temperature measurements was to determine the hypothetical solubility in xylene below the xylene freezing point.

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	Mole Fraction (x₁)	x₁ Note	Mole Fraction (x₃)	x₃ Note	Remark(s)
−40.0	233.15	1	182.4	1	0.091	Ethene	0.311	Ethylbenzene in Solvent	o:0.5545 moles solvent; 0.0809 moles ethene
−40.0	233.15	1	182.4	1	0.091	Ethene	0.311	Ethylbenzene in Solvent	e:0.2504 moles solvent; 0.0809 moles ethene
−40.0	233.15	1	395.2	1	0.186	Ethene	0.311	Ethylbenzene in Solvent	o:0.4854 moles solvent; 0.1608 moles ethene
−40.0	233.15	1	395.2	1	0.186	Ethene	0.311	Ethylbenzene in Solvent	e:0.2192 moles solvent; 0.1608 moles ethene
−40.0	233.15	1	587.7	1	0.278	Ethene	0.311	Ethylbenzene in Solvent	o:0.5497 moles solvent; 0.3066 moles ethene
−40.0	233.15	1	587.7	1	0.278	Ethene	0.311	Ethylbenzene in Solvent	e:0.2482 moles solvent; 0.3066 moles ethene
−40.0	233.15	1	689.0	1	0.328	Ethene	0.311	Ethylbenzene in Solvent	o:0.5249 moles solvent; 0.3722 moles ethene
−40.0	233.15	1	689.0	1	0.328	Ethene	0.311	Ethylbenzene in Solvent	e:0.2370 moles solvent; 0.3722 moles ethene
−60.0	213.15	1	192.5	1	0.161	Ethene	0.593	Ethylbenzene in Solvent	o:0.3272 moles solvent; 0.1540 moles ethene
−60.0	213.15	1	192.5	1	0.161	Ethene	0.593	Ethylbenzene in Solvent	e:0.4768 moles solvent; 0.1540 moles ethene
−60.0	213.15	1	395.2	1	0.331	Ethene	0.593	Ethylbenzene in Solvent	o:0.3263 moles solvent; 0.3961 moles ethene
−60.0	213.15	1	395.2	1	0.331	Ethene	0.593	Ethylbenzene in Solvent	e:0.4755 moles solvent; 0.3961 moles ethene

Notes:
   ¹  Calculated by compiler.
   ²  The symbol o, and e, refer to actual number of moles of o-xylene, and ethylbenzene, in gas-free solvent solution, respectively.
   ³  The ethene-free solvent composition (x'₃) was calculated by the compiler.

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%.
   2. The 1,2-Dimethylbenzene purity was 99.9% as determined by GC.
   3. Ethylbenzene source and purity not given.

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