超临界CO_2萃取芹菜籽油研究

用超临界ＣＯ２萃取技术对广东白芹菜籽进行了萃取研究。结果表明，萃取压力低于１５ＭＰａ时，较重的油树脂等成分难以被萃取出来；萃取温度为３０８Ｋ时对萃取最有利；解析温度对萃取效率影响较小；ＣＯ２流量对萃取效率的影响比床层高度引起的扩散阻力的影响大得多。超临界ＣＯ２萃取所得芹菜籽油品质优越，且其中的药用有效成分（３－正丁基－４，５－二氢苯并呋喃酮）含量比水汽法所得芹菜籽油的高五倍多。

Study on the Supercritical Carbon Dioxide Extraction of Celery Oil

オe　have　studied　the　supercritical　CO2　extraction　(SFE CO2)　of　Guangdong　white　celery　seed　in　present　paper.The　effects　of　extraction　pressure,extraction　temperature,CO2　flow　rate　and　expansion　temperature　on　the　oil　yield　were　examined　in　detail.The　results　combined　with　the　chemical　composition　data　of　celery　oil　from　SFE CO2　indicate　that　1)　when　extraction　pressure　is　lower　than　15.0　MPa,　the　oil　resin　and　other　heavier　components　can　not　nearly　be　extracted,2)　308K　is　the　optimal　temperature　for　extraction,3)　the　expansion　temperature　and　the　diffusion　of　CO2　seems　to　be　little　important　to　extraction;and　4)　the　higher　the　flow　rate　of　CO2,　the　higher　the　extraction　efficiency　will　be.Additionally,　SFE CO2　can　selectively　extracted　the　sedonenolide　which　is　effective　medically.