Solubilities of Methylbenzoic Acid Isomers in Supercritical Carbon Dioxide

Tsai, Kuen-Long; Tsai, Fuan-Nan

doi:10.1021/je00017a057

Cited by 26 publications

(8 citation statements)

References 7 publications

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“…Examination of the temperature effect on the solubility data (Table 1) reveals the existence of a retrograde (crossover/pressure effect) behavior for the xanthone derivatives in supercritical CO 2 , as was reported for different organic compounds previously (Fat'hi et al, 1998 andTsai and Tsai, 1995;Yu et al, 1995). At pressures above the crossover point (i.e., about 190 bar), solubilities increase with increasing both pressure and temperature, while, below this point, solubilities increase with increasing pressure but decrease with increasing temperatures.…”

Section: Resultssupporting

confidence: 65%

Solubilities of Some Hydroxyxanthone Derivatives in Supercritical Carbon Dioxide

et al. 1999

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The equilibrium solubilities of four hydroxyxanthone derivatives have been measured in supercritical carbon dioxide using a simple and reliable static method. The measurements were performed in the pressure range 74.0−354.6 bar at the temperatures 32, 45, 55, 65, and 75 °C. The order of solubility observed for the compounds used was discussed in terms of their possible intra- and intermolecular H-bonds and polarities. The measured solubilities were correlated using a semiempirical model. The calculated results show satisfactory agreement with the experimental data.

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Section: Resultssupporting

confidence: 65%

Solubilities of Some Hydroxyxanthone Derivatives in Supercritical Carbon Dioxide

et al. 1999

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“…From the effect of temperature on solubilities (Table 2), it is found that the retrograde solubility (crossover/pressure effect) behavior for the compounds exists in the supercritical state, as it was reported for different organic compounds previously (Knez et al, 1995;Tsai and Tsai, 1995;Yu et al, 1995). At pressures above the crossover point (i.e., about 202.7 bar), solubilities increase with increases of both pressure and temperature, while below this point, solubilities increase with increasing pressure but decrease with an increase in temperature.…”

Section: Resultssupporting

confidence: 64%

Solubilities of Some 1,4-Dihydroxy-9,10-anthraquinone Derivatives in Supercritical Carbon Dioxide

et al. 1998

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The equilibrium solubilities of three recently synthesized 9,10-anthraquinone derivatives have been measured in supercritical carbon dioxide using a simple and reliable static method. The measurements were performed in the pressure range 121.6 to 405.3 bar at temperatures (35, 45, 55, 65, and 75) °C. The measured solubilities were correlated using the model proposed by Chrastil. The calculated results show good agreement with the experimental data.

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“…The same behavior was reported for different organic compounds previously. [20][21][22] At pressures above the crossover region (182 bar), solubility increases with increasing both pressure and temperature, while, below this point, solubility increases with increasing pressure but decreases with increasing temperature. At lower pressure, the fluid density is lowered by a small increase in temperature.…”

Section: Resultsmentioning

confidence: 99%