Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
10271623 | Fluid Phase Equilibria | 2005 | 5 Pages |
Abstract
This work contributes to the development of an enrichment process for antioxidant compounds in aqueous alcoholic extracts of boldo (Peumus boldus M.) leaves by using high-pressure CO2 as the solvent. Specifically we measured the high-pressure solubility (y2, molar fraction) of a selected bioactive compound in boldo leaves (boldine) in CO2 as a function of system temperature (298 K â¤Â T â¤Â 333 K) and pressure (8 MPa â¤Â P â¤Â 40 MPa). Experimental data was correlated by using a density-based model which is valid for solvent densities >607 kg/m3. Predicted solubility values are low (4 Ã 10â7 â¤Â y2 â¤Â 6 Ã 10â5) but comparable with those of nitrogen-containing organic compounds with similar molecular weight (327.4 Da) and solubility parameter (28.3 MPa0.5 at 313 K) as boldine.
Related Topics
Physical Sciences and Engineering
Chemical Engineering
Chemical Engineering (General)
Authors
Juan C. de la Fuente, Natalie Quezada, José M. del Valle,