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Influence of Modifier in Supercritical CO<sub>2</sub> on Qualitative and Quantitative Extraction Results of <i>Eucalyptus</i> Ecential Oil
Faculty of Chemical Engineering, Kunming University of Science and Technology, Kunming, China
Faculty of Chemical Engineering, Kunming University of Science and Technology, Kunming, China
Faculty of Chemical Engineering, Kunming University of Science and Technology, Kunming, China
Faculty of Chemical Engineering, Kunming University of Science and Technology, Kunming, China
Faculty of Chemical Engineering, Kunming University of Science and Technology, Kunming, China
Faculty of Chemical Engineering, Kunming University of Science and Technology, Kunming, China
Faculty of Chemical Engineering, Kunming University of Science and Technology, Kunming, China
- 1 Faculty of Chemical Engineering, Kunming University of Science and Technology, Kunming, China
- 2 Faculty of Chemical Engineering, Kunming University of Science and Technology, Kunming, China
- 3 Faculty of Chemical Engineering, Kunming University of Science and Technology, Kunming, China
- 4 Faculty of Chemical Engineering, Kunming University of Science and Technology, Kunming, China
- 5 Faculty of Chemical Engineering, Kunming University of Science and Technology, Kunming, China
- 6 Faculty of Chemical Engineering, Kunming University of Science and Technology, Kunming, China
- 7 Faculty of Chemical Engineering, Kunming University of Science and Technology, Kunming, China
American Journal of Plant Sciences·Volume 09 (2018)·Pages 163–171·Published 18 January 2018·DOI10.4236/ajps.2018.92014
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Abstract
A supercritical CO 2 extraction behavior of Eucalyptus oil was investigated under different conditions of pressure, temperature and time with or without cosolvent. The pressure range was from 8 to 25 MPa, temperature from 35 to 55°C and CO 2 flow rate from 10 to 26 g/min. For 1,8-cineole the appropriate e xtracting pressure was 15 MPa and temperature was 45°C. When CO 2 flow rate was 18 g/min, it was benefit to extract the other three substances (limonene, p -cymene and γ -terpinene, respectively) except 1,8-cineole. Prolonging extraction time could not obviously increase the extract concentration, but the extract yield would increase. The results also indicated that ethanol as a modifier could improve extraction velocity and extraction concentration.
KeywordsSupercritical CO<sub>2</sub>Extraction Behavior<i>Eucalyptus</i>Oil18-CineoleModifier
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