超临界CO_2萃取除虫菊酯的研究

Study on Extraction of Pyrethrin from Pyrethrum by Supercritical CO_2

采用超临界CO2 萃取除虫菊中有效成分除虫菊酯。研究了萃取压力、萃取温度对产品的收率和品质的影响 ,以及CO2 流量和萃取时间的关系。其最优化工艺条件为 :压力 16Mpa,温度 4 0 °C,当CO2 流量为2 0m3 /h时 ,萃取时间为

Extraction of active constit ue nts from pyrethrum by supercritical CO_2 at different conditions of pressure?t emperture to estimate the yield and quality,and the relation of CO_2 outflow an d contact time.The better conditions is pressure range 16MPa,temperture range 35 °C and contact time 2h.