Thiswork 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 (298K!UT!U333 K) and pressure (8MPa!UP!U40MPa). 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!A10.7 !Uy2 !U6!A10.5) but comparable with those of nitrogen-containing organic compounds with similar molecular weight (327.4 Da) and solubility parameter (28.3MPa0.5 at 313 K) as boldine.
Compounds
#
Formula
Name
1
C19H21NO4
boldine
2
CO2
carbon dioxide
Datasets
The table above is generated from the ThermoML associated json file (link above).
POMD and RXND refer to PureOrMixture and Reaction Datasets. The compound numbers are included in properties, variables, and phases, if specificied;
the numbers refer to the table of compounds on the left.
Type
Compound-#
Property
Variable
Constraint
Phase
Method
#Points
POMD
2
1
Mole fraction - 1 ; Fluid (supercritical or subcritical phases)
Temperature, K; Fluid (supercritical or subcritical phases)
Pressure, kPa; Fluid (supercritical or subcritical phases)