caa a22 4500 465755143 CHVBK 20180323111845.0 cr unu---uuuuu 170327e19900101xx s 000 0 eng 10.1007/BF00503864 doi (NATIONALLICENCE)springer-10.1007/BF00503864 An FTIR spectroscopic study of hydrogen-bonding competition in entrainer-cosolvent mixtures [Elektronische Daten] [J. Walsh, M. Greenfield, G. Ikonomou, M. Donohue] In chemical separation processes such as supercritical extraction the use of an entrainer cosolvent can dramatically improve selectivity and yield. Ideally, in an extraction process, an entrainer cosolvent should complex with only the desired solute, pulling it from the feed. But not all cosolvents are entrainers, and a cosolvent that is effective in one application may not be effective in others. Often, competing hydrogen bonding interactions limit the effectiveness of an entrainer cosolvent. In this paper FTIR spectroscopy is used to study hydrogen bonding competition in solute/solvent/entrainer cosolvent mixtures. The extent of hydrogen bonding is determined from analysis of hydrogen-bonded and non-hydrogen-bonded infrared absorption peaks. Since these peaks overlap, curvefitting and Fourier self-deconvolution techniques are used to resolve them. Concentrations of monomeric and hydrogen-bonded species are modeled using the associated perturbed anisotropic chain theory (APACT). 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) vIIC i vi . This gives a statistical mechanical basis for the empirical observation that for hydrogen-bonding equilibria, the ratio of concentrations is approximately equal to the ratio of activities. Plenum Publishing Corporation, 1990 entrainer nationallicence FTIR nationallicence hydrogen bonding nationallicence supercritical nationallicence Walsh J. Department of Chemical Engineering, The Johns Hopkins University, 21218, Baltimore, Maryland, USA aut Greenfield M. Department of Chemical Engineering, The Johns Hopkins University, 21218, Baltimore, Maryland, USA aut Ikonomou G. Department of Chemical Engineering, The Johns Hopkins University, 21218, Baltimore, Maryland, USA aut Donohue M. Department of Chemical Engineering, The Johns Hopkins University, 21218, Baltimore, Maryland, USA aut International Journal of Thermophysics Kluwer Academic Publishers-Plenum Publishers 11/1(1990-01-01), 119-132 0195-928X 11:1<119 1990 11 10765 https://doi.org/10.1007/BF00503864 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF00503864 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Walsh J. Department of Chemical Engineering, The Johns Hopkins University, 21218, Baltimore, Maryland, USA aut NATIONALLICENCE 700 1- Greenfield M. Department of Chemical Engineering, The Johns Hopkins University, 21218, Baltimore, Maryland, USA aut NATIONALLICENCE 700 1- Ikonomou G. Department of Chemical Engineering, The Johns Hopkins University, 21218, Baltimore, Maryland, USA aut NATIONALLICENCE 700 1- Donohue M. Department of Chemical Engineering, The Johns Hopkins University, 21218, Baltimore, Maryland, USA aut NATIONALLICENCE 773 0- International Journal of Thermophysics Kluwer Academic Publishers-Plenum Publishers 11/1(1990-01-01), 119-132 0195-928X 11:1<119 1990 11 10765 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer