Principle of extraction by supercritical carbon dioxide

Supercritical extraction by carbon dioxide is a separation process taking advantage of the fact that above the temperature of 31 ⁰C (CO₂ critical temperature) carbon dioxide cannot be liquified by any further increases in pressure. In this supercritical state the dense gas gains a considerable solvent power that can be varied by changes in pressure and temperature. By reducing the pressure in the separator the solvent power of the gas drops steeply and the extract precipitates. Most extractions are run at temperatures of 40 – 60 ⁰C and pressures of 100 – 300 bar.


Further information on supercritical extraction:

Advantages of supercritical extraction by carbon dioxide

Properties of carbon dioxide in the process of supercritical extraction

Examples of solubility of substances in supercritical carbon dioxide

The process of extraction in FLAVEKO Trade spol. s r.o.

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