Solubility of the Natural Antioxidant Gallic Acid in Supercritical CO2 + Ethanol as a Cosolvent
作者： Amparo Cháfer , Tiziana Fornari , Roumiana P. Stateva , Angel Berna , José García-Reverter
DOI: 10.1021/JE060273V
关键词: Gallic acid 、 Organic chemistry 、 Solubility 、 Chemistry 、 Phenolic acid 、 Ethanol 、 Phenols 、 Carbon dioxide 、 Supercritical fluid 、 Polyphenol
摘要: Solubility data of solid 3,4,5-trihydroxybenzoic acid (gallic acid) in supercritical CO2 + ethanol as a cosolvent are reported this work. Measurements were carried out the temperature range (313.15 to 333.15) K, pressures ranging from (10 40) MPa, and different modifier content (0.7 6) %. The experimental correlated using Soave−Redlich−Kwong equation state group contribution associating state. thermodynamic modeling analysis includes also solubility representation an important class natural antioxidants (e.g., gallic esters) CO2.
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