To study the feasibility of using supercritical CO2 to concentrate natural tocopherols from soybean oil deodorizer distillate (DOD), we measured the ternary phase equilibrium data for methyl oleate + R-tocopherol + supercritical CO2 from (313.15 to 353.15) K in the pressure range from (10 to 29) MPa. The measured data were well correlated using the Soave-Redlich-Kwong EOS with the Adachi-Sugie mixing rule. The separation factor between methyl oleate and tocopherol in CO2 was investigated. On the basis of these results, equilibrium lines in the experimental ranges were obtained that provide fundamental data for concentrating tocopherols with supercritical CO2. In addition, because the distribution of tocopherol in supercritical CO2 increases markedly because of the abundance of methyl oleate, methyl oleate was shown to act as a cosolvent for tocopherol. Finally, according to the obtained results, a strategy for a separation operation was suggested. Visual observation also provided information useful in further experiments and design.
Compounds
#
Formula
Name
1
CO2
carbon dioxide
2
C19H36O2
methyl cis-9-octadecenoate
3
C29H50O2
dl-.alpha.-tocopherol
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.