Accession Number:

ADA169752

Title:

Investigation of Deviations from Ideality in the Two Liquid Phase Region of Systems of Medium Molecular Weight Hydrocarbon Mixtures and Water.

Descriptive Note:

Final rept. 1 Jan 83-31 Dec 85,

Corporate Author:

VIRGINIA INST OF MARINE SCIENCE GLOUCESTER POINT DEPT OF CHEMICAL OCEANOGRAPHY

Report Date:

1986-02-01

Pagination or Media Count:

115.0

Abstract:

Two-phase systems of liquid hydrocarbon mixture, containing medium molecular weight aromatic and aliphatic hydrocarbons, and water were examined in both equilibrium and kinetic experiments. Knowledge of the aqueous solution behavior of liquid hydrocarbon mixtures is important in determining the fate of hydrocarbon components of fuels and petroleum in environmental release situations. The equilibrium solute concentration for a component is given by the product of the pure compound solubility, its mole fraction in the hydrocarbon phase and its activity coefficient in the hydrocarbon phase. Hydrocarbon phase activity coefficients determined for binary hydrocarbon mixtures using static vapor pressure measurements at 20 and 70 degs. and those determined using water solubility results at 20 and 70 degs. did not differ significantly. This indicated that component aqueous phase activity coefficients did not decrease measurably in the presence of hydrocarbon co-solutes, in contradiction to some previously published observations, and that the presence of water in the hydrocarbon phase was not significant at these temperatures. Methods for predicting multicomponent mixture solubilities were demonstrated. Aqueous solution behavior of mixtures containing a chlorinated hydrocarbon or a fatty acid surfactant was also determined.

Subject Categories:

  • Organic Chemistry
  • Atomic and Molecular Physics and Spectroscopy

Distribution Statement:

APPROVED FOR PUBLIC RELEASE