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Title:Specific intermolecular interactions for tailoring supercritical fluid solutions
Author(s):Ekart, Michael Paul
Department / Program:Chemical and Biomolecular Engineering
Discipline:Chemical Engineering
Degree Granting Institution:University of Illinois at Urbana-Champaign
Subject(s):Engineering, Chemical
Abstract:Investigations of supercritical fluid solutions containing cosolvents are described; in addition, recommendations for future work to improve the understanding of these solutions are made.
A new chromatographic technique to measure cosolvent effects rapidly and accurately is detailed. With this technique, a large database of cosolvent effects was acquired for a variety of solutes and cosolvents in ethane. Different types of specific intermolecular interactions, such as hydrogen bonding or charge transfer complex formation, were proposed to explain the observed cosolvent effects. Use of the chromatograph to measure solvent effects and solubilities is also discussed.
Techniques to model solutions with chemical interactions are reviewed. A new chemical-physical model is developed and applied to supercritical fluid solutions to describe solute-solvent and solute-cosolvent interactions. Finally, the supercritical fluid extraction of nonionic surfactants is discussed. Experimental results for diverse fluids were used to model a multistage extraction.
Issue Date:1992
Rights Information:Copyright 1992 Ekart, Michael Paul
Date Available in IDEALS:2011-05-07
Identifier in Online Catalog:AAI9236445
OCLC Identifier:(UMI)AAI9236445

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