A New Simple Static Method for the Determination of Solubilities of Condensed Compounds in Supercritical Fluids

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Abstract

A simple static method based on gravimetric measurements has been adopted to measure the solubility ofbenzenecarboxylic acid, 2-hydroxy-benzenecarboxylic acid, 4-hydroxy-benzenecarboxylic acid and 1,8-dihydroxyanthraquinonealong several isotherms in the temperature range 318–357 K and the pressure interval 7–23 MPa.Solubility data have been correlated with the Zieger–Eckert approach, using the Fedor atomic and group contributionmethod to estimate the solubility parameter and the molar volume of the solutes. A good agreement wasobtained between data reported in the literature and those determined using the proposed method which allows oneto measure solubility mole fraction as low as 10−5. Provided that a suitable analytical technique is adopted themethod can be extended also to multicomponent systems.
Original languageEnglish
Pages (from-to)7-17
Number of pages11
JournalTHE JOURNAL OF SUPERCRITICAL FLUIDS
Volume24
Publication statusPublished - 2002

All Science Journal Classification (ASJC) codes

  • General Chemical Engineering
  • Condensed Matter Physics
  • Physical and Theoretical Chemistry

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