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Sub-critical carbon dioxide extraction of the hexane extract of the leaves of Tasmannia lanceolata

journal contribution
posted on 2023-05-18, 15:33 authored by Sandra GarlandSandra Garland, Robert MenaryRobert Menary
The extraction of Tasmannia lanceolata concrete using liquid CO2 at sub-critical conditions of pressure and temperature was investigated. A pilot-scale extractor was modified to include a second liquid metering pump for the recycling of the re-condensed CO2. Phase equilibrium was the controlling thermodynamic element in the rate of oil extraction while mass balance transfer dominated the solubilities of lower molecular weight, non-polar individual components. Polygodial, as the heaviest and highest oxygenated component, had a different apparent solubility to the lower monoterpenes and a solubility minimum was observed for this di-aldehyde at pressures in the order of 110 bar and at temperatures of 20°C to 24°C. The large variation in density associated with liquid carbon dioxide as it approaches critical temperature and pressure provides for higher selectivity of extraction.

History

Publication title

Journal of Essential Oil Research

Volume

28

Pagination

55-63

ISSN

1041-2905

Department/School

Tasmanian Institute of Agriculture (TIA)

Publisher

Taylor & Francis Inc.

Place of publication

United States

Rights statement

Copyright 2015 Taylor & Francis

Repository Status

  • Restricted

Socio-economic Objectives

Berry fruit (excl. kiwifruit)

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