IUPAC-NIST Solubilities Database

IUPAC-NIST Solubility Database
NIST Standard Reference Database 106

Solubility System: Ethene with 2, 2 -[1, 2-Ethanediylbis (oxy) ] bis-ethanol, (triethylene glycol)

Components:
   (1) 2, 2 -[1, 2-Ethanediylbis (oxy) ] bis-ethanol, (triethylene glycol); C6H14O4; [112-27-6]  NIST Chemistry WebBook for detail
   (2) Ethene; C2H4; [74-85-1]  NIST Chemistry WebBook for detail

Original Measurements:
   Hannaert, H.; Haccuria, M.; Mathieu, M.P., Ind. Chim. Belge 1967, 32, 156-164.

Variables:
   Temperature = 303.15 K
   Pressure = 303.15 K

Prepared By:
   W. Hayduk

Experimental Remarks:

   The authors definitions are for Kπν are :

K = y₁/x₁ = mole fraction gas in gas phase ÷ mole fraction gas in liquid phase

π / atm = total pressure

ν = coefficient of fugacity

The function Kπν /atm, is equivalent to a Henry's constant in the form H_1,2/atm = (ƒ₁/atm)/x₁ where ƒ₁ is the fugacity.

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


t/°C	T/K	Henry's law constant, K [πν]	Mole Fraction (x₁)	x₁ Note
30	303.15	550	0.00182	1

Notes:
   ¹  Mole fraction solubility calculated by compiler for a gas partial pressure of 101.3 kPa with v = 1.

Method/Apparatus/Procedure:
   The authors describe several methods used; the one used in this case is the gas chromatographic method.
The stationary phase of the column was impregnated with a known mass of solvent. Nitrogen was used for determining the free volume of gas in the column. Various corrections were employed for dead volumes in the tubing and detector as well as for inlet and outlet pressures. Unfortunately the method could only be used with solvents of very low volatility.

Source and Purity of Materials:
   1. Ethene. Air Liquide. Specified purity 99.9%.
   2. Triethylene glycol. No information.

Estimated Errors:
   Solubility: δx₁/x₁ = ± 2 to 5% (authors)