Author(s)

Wenyang Dai, Soulisith Keokurngsamay, Yuan Chen, Xiao Zhu, Lili Gu^*, Yi Han, Zhijun Li

Faculty of Chemical Engineering, Kunming University of Science and Technology, Kunming, China.

A supercritical CO₂ 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 CO₂ flow rate from 10 to 26 g/min. For 1,8-cineole the appropriate extracting pressure was 15 MPa and temperature was 45°C. When CO₂ 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.

Supercritical CO₂ Extraction Behavior, Eucalyptus Oil, 1, 8-Cineole, Modifier

Dai, W. , Keokurngsamay, S. , Chen, Y. , Zhu, X. , Gu, L. , Han, Y. and Li, Z. (2018) Influence of Modifier in Supercritical CO₂ on Qualitative and Quantitative Extraction Results of Eucalyptus Ecential Oil. American Journal of Plant Sciences, 9, 163-171. doi: 10.4236/ajps.2018.92014.