VAPOR-LIQUID-EQUILIBRIUM OF POLYMER-SOLUTIONS USING A CUBIC EQUATION OF STATE


ORBEY N., SANDLER S.

AICHE JOURNAL, vol.40, no.7, pp.1203-1209, 1994 (Journal Indexed in SCI) identifier identifier

  • Publication Type: Article / Article
  • Volume: 40 Issue: 7
  • Publication Date: 1994
  • Doi Number: 10.1002/aic.690400711
  • Title of Journal : AICHE JOURNAL
  • Page Numbers: pp.1203-1209

Abstract

A recently proposed mixing rule has been combined with a cubic equation of state to correlate the vapor-liquid equilibria of various polymer + solvent and solvent + long chain hydrocarbon mixtures. We find that the two-parameter version of this model can correlate the solvent partial pressure in concentrated polymer solutions with high accuracy over a range of temperatures and pressures with temperature-independent parameters. For the solvent + long chain hydrocarbon systems, for which accurate vapor-phase concentrations are also important, the model is best used as a three-parameter correlation. Advantages of this approach are that it extends the application of cubic equations of state to polymer + solvent systems in a simple fashion and that generally only temperature-independent parameters are required which allow for accurate interpolation and extrapolation of available data.