2003•Natural Science Journal of Xiangtan UniversityRequires access

Technology on Extracting the Volatile Oils of the Leaves of Perilla frutescens With Supercritical CO_2

Hongyan Zeng

Abstract

Perilla frutescens, an annual herb, is an important medical and edible plant. In the paper, we firstly studied the effect of the pressure, the temperature, the CO 2 flowing and extracting time on extraction of the volatile oil of its leaves with supercritical CO 2 , and determined its optimal extracting conditions: the pressure 20 Mpa, the temperature 45 ℃, CO 2 flowing rate30 kg/h and the time 100 min. The volatile oils were obtained by supercritical CO 2 and steam distillation, extraction rates are 5.13% and 0.415% respectively. The rate of the former is higher, and its time is shorter.

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Key concepts: Perilla frutescens, Supercritical fluid, Perilla, Steam distillation, Extraction (chemistry), Distillation, Chemistry, Chromatography