Influence of Modifier in Supercritical CO<sub>2</sub>on Qualitative and Quantitative Extraction Results of <i>Eucalyptus</i>Ecential Oil

• 作者: Lili Gu Soulisith Keokurngsamay Wenyang Dai Xiao Zhu Yi Han Yuan Chen Zhijun Li
• 来源期刊: 美国植物学期刊(英文)
• 学科: 医学
• 关键词: Supercritical CO2 EXTRACTION Behavior EUCALYPTUS OIL 1 8-Cineole MODIFIER
• 年，卷（期）: 2018,（2）
• 页码范围: 163-171
• 页数: 9页
• 分类号: R73

摘要

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.