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Optimization of the Supercritical Carbon Dioxide Separation of Bergapten From Bergamot Essential Oil

Optimization of the Supercritical Carbon Dioxide Separation of Bergapten From Bergamot Essential Oil

Vincenzo Sicari

J AOAC Int. 2018 Jan 1;101(1):293-297.

PMID: 28762330

Abstract:

The possibility of following traditional cold-press extraction with the post process continuous separation of bergapten from bergamot essential oil was investigated. A fractionation tower was used in an experiment in which cold-pressed bergamot oil was extracted in a continuous countercurrent process by supercritical carbon dioxide under different conditions. Bergapten is fairly soluble in CO2 in its supercritical phase, in particular at a density of 277.90 kg⋅m-3, corresponding to a pressure of 8 MPa and temperature of 40°C. Under these conditions, an extract with 0.198% bergapten was obtained, a figure slightly below the percentage of bergapten contained in cold-pressed oil (0.21%). However, at densities below 200 kg⋅m-3, the amount of bergapten in the extracted oil was negligible. Of all tested conditions for separation, the best was found to be at a pressure of 8 MPa and temperature of 70°C, conditions under which bergapten was not detected. The results of the experiment showed that bergapten, and the non-volatile fraction in general, was extracted only in small quantities and was not extracted at all with at a CO2 pressure of 8 MPa.

Chemicals Related in the Paper:

Catalog Number	Product Name	Structure	CAS Number	Price
AP484208-A	Bergapten		484-20-8	Price

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