姜酚超临界流体萃取-精馏技术

Technique of Supercritical Fluid Extraction-Fractionation for Gingerol

采用超临界流体萃取-精馏技术从生姜中提取姜酚。考察了萃取压力、萃取温度、萃取时间、CO2流速、原料粒度等因素对姜酚纯度和萃取率的影响。确定的最佳条件为萃取压力25MPa,萃取温度50℃,CO2流量20L/h,萃取时间2 5h,原料粒度40～60目。获得的提取物中姜酚的质量分数≥96 2%,萃取率≥1 38%。

A technique for extracting gingerol from ginger with supercritical fluid extraction-fractionation is described.The optimum extraction conditions were extraction pressure 25 MPa,extraction temperature 50 ℃,extraction time 2.5 h,flow rate of CO_2 20 L/h and grain size of raw material 40～60 mesh.Content of gingerol in the extract is as high as 96.2% and the yield is 1.38%.