Third phase formation in solvent extraction

A microemulsion model

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

Third phase formation, the separation of a solvent extraction organic phase into two liquids, is generally attributed to the limited solubility of the extracted complexes in the hydrocarbon diluents. Much of the research on third phase formation, therefore, emphasizes experiments designed to establish the stoichiometry of the species responsible for the limited solubility. This work offers a different approach, based on the recognition that the solvent extraction third phase, in fact, corresponds to the middle phase in a microemulsion fluid system. Using the tri-n-butylphosphate (TBP)-diluent-water-electrolyte system as a model system, current concepts of microemulsion phase behavior are utilized to develop a general framework for interpreting and predicting the patterns of phase behavior in solvent extraction systems.

Original languageEnglish (US)
Pages (from-to)339-346
Number of pages8
JournalProceedings of the Engineering Foundation Conference
StatePublished - 1999

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Microemulsions
Solvent extraction
Phase behavior
Solubility
Stoichiometry
Hydrocarbons
Electrolytes
Fluids
Liquids
Water
Experiments

All Science Journal Classification (ASJC) codes

  • Engineering(all)

Cite this

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abstract = "Third phase formation, the separation of a solvent extraction organic phase into two liquids, is generally attributed to the limited solubility of the extracted complexes in the hydrocarbon diluents. Much of the research on third phase formation, therefore, emphasizes experiments designed to establish the stoichiometry of the species responsible for the limited solubility. This work offers a different approach, based on the recognition that the solvent extraction third phase, in fact, corresponds to the middle phase in a microemulsion fluid system. Using the tri-n-butylphosphate (TBP)-diluent-water-electrolyte system as a model system, current concepts of microemulsion phase behavior are utilized to develop a general framework for interpreting and predicting the patterns of phase behavior in solvent extraction systems.",
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