2005•Unpublished venueRequires access
Extraction of the Volatile Oils from Lotus Leaves by Supercritical CO_2
Jielong Su
Open publisher page 0 citations
Abstract
AbstrcatLotus leaves, the leaves of an annual herb plant Nelumbo nucifera, is an important medicine material in China. In the paper,the effects of the pressure, the temperature, the CO_2 flowing and time on the extraction rate of the volatile oil from the leaves by supercritical CO_2. Thus the optimal extracting conditions are determined: the pressure 30 MPa, the temperature 40℃, CO_2 flowing 35 kg/h and the time 90 min. The volatile oils were obtained by supercritical CO_2 and steam distillation, extraction rate (3.56%) and 1.65% respectively. The results show that the qualitiy of the volatile oil extracted by supercritical CO_2 is better than the latter, extraction rate higher, the extracting time shorter and without solvent remainder.