Isothermal pressure dependence of the solubility of some triazines in supercritical CO2 |
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| Authors: | Silvana V Rodrigues Decio Nepomuceno Luci Viana Martins and W Baumann |
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| Institution: | (1) Departamento de Química Analítica, Instituto de Química, Universidade Federal Fluminense, 22.240-090 Niterói, RJ, Brasil, XX |
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| Abstract: | The solubility of two related series of each three triazine compounds has been determined in supercritical CO2, at 40 °C and pressures between 80 and 220⋅105 Pa. A high pressure small volume cell with adjustable optical path and built-in circulation pump has been constructed to
be used with quartz windows in a Perkin Elmer UV-VIS spectral photometer. At 220 bar solubilities are between 0.3 and 25 g/L,
dependent on the specific triazine structure. The isothermal pressure dependence of the solubility could be modelled using
the pressure dependent dielectric constant of CO2 as the only variable.
Received: 30 October 1996/Revised: 3 April 1997/Accepted: 13 April 1997 |
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