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- W2057018714 abstract "Abstract In chemical separation processes such as supercritical extraction, the use of an entrainer cosolvent can dramatically improve selectivity and yield. Ideally, an cntrainer cosolvent should solvate only the desired solute, pulling it from the feed. Prospective entrainers therefore are chosen for their hydrogen bonding tendency. But not all cosolvents are effective entrainers, and an entrainer that is effective for one application may not be effective for others. The effectiveness of a cosolvent as an entrainer can be limited by competition among various hydrogen bonding species in the mixture. In this paper, experiment and theory are presented for hydrogen bonding in entrainer cosolvent mixtures. Concentrations of monomelic and hydrogen bonded species are determined using FTIR spectroscopy and these data are modeled using the Associated Perturbed Anisotropic Chain Theory (APACT). Liquid solvents with hydrogen bonding properties similar to those of supercritical fluids are used. Using APACT, it is shown that the equilibrium constant, derived from activities, can be written as the product of a temperature dependent term and the ratio of concentrations: K = (RT)v Π Cvi i. This gives a statistical mechanical basis for the empirical observation that the equilibrium constant can be calculated as the ratio of concentrations of monomeric and hydrogen bonded species. KEYWORDS: Hydrogen-bondingCosolvent mixturesSelectivityYield" @default.
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- W2057018714 date "1989-12-01" @default.
- W2057018714 modified "2023-10-18" @default.
- W2057018714 title "HYDROGEN-BONDING COMPETITION IN ENTRAINER COSOLVENT MIXTURES" @default.
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- W2057018714 doi "https://doi.org/10.1080/00986448908940367" @default.
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