Influence of Modifier in Supercritical CO₂on Qualitative and Quantitative Extraction Results of <i>Eucalyptus</i>Ecential Oil  

作　　者：Wenyang Dai Soulisith Keokurngsamay Yuan Chen Xiao Zhu Lili Gu Yi Han Zhijun Li 

机构地区：[1]Faculty of Chemical Engineering, Kunming University of Science and Technology, Kunming, China

出　　处：《American Journal of Plant Sciences》2018年第2期163-171,共9页美国植物学期刊（英文）

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&deg;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&deg;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.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&deg;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&deg;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.

关 键 词：Supercritical CO2 EXTRACTION Behavior EUCALYPTUS OIL 1 8-Cineole MODIFIER 

分 类 号：R73[医药卫生—肿瘤]