Extraction of foodstuff with carbon dioxide

Extraction of foodstuff with carbon dioxide: Present status and potential

Summary:
With the background of more than 15 years experience in the field of extraction with supercritical gases a survey of existing plants will be presented. Together with the patentsituation the suggested applications are compared to the actually performed processes. It is remarkable that up to now the main impulse for the application of Carbon Dioxide as solvent was the mere replacement of conventional solvents that have become suspicious because of several reasons. Applications where dense gases can exhibit their real advantages like in fractionating extraction or separation or in continuous fluid/liquid countercurrent extraction are somewhat rare up to now. Economics together with legal (environmental) injunctions will determine the future of the applications of dense gases in foodstuff and similar industries. Most often one has to compete with alternative products or processes.

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