TITLE:
Influence of Modifier in Supercritical CO2 on Qualitative and Quantitative Extraction Results of Eucalyptus Ecential Oil
AUTHORS:
Wenyang Dai, Soulisith Keokurngsamay, Yuan Chen, Xiao Zhu, Lili Gu, Yi Han, Zhijun Li
KEYWORDS:
Supercritical CO2 Extraction Behavior, Eucalyptus Oil, 1, 8-Cineole, Modifier
JOURNAL NAME:
American Journal of Plant Sciences,
Vol.9 No.2,
January
24,
2018
ABSTRACT: 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.