Supercritical CO 2 extraction was applied to the extraction of flavonoids from licorice. The optimized conditions are: CO 2 pressure 30 MPa, temperature 50 ℃, solid to entrainer ratio 1∶5(g/mL), CO 2 flow rate 10 kg...Supercritical CO 2 extraction was applied to the extraction of flavonoids from licorice. The optimized conditions are: CO 2 pressure 30 MPa, temperature 50 ℃, solid to entrainer ratio 1∶5(g/mL), CO 2 flow rate 10 kg/h, separation pressure 5.5 MPa temperature 40 ℃. Results showed that the flavonoids yield obtained by supercritical CO 2 extraction was 2.2 times that obtained by common solvent extraction method.展开更多
Patchouli is not only a Chinese herb, but also a natural perfume plant.Patchouli concrete and oil can be extracted from the plant.Single factor experiments and orthogonal experiments were adopted to investigate the ef...Patchouli is not only a Chinese herb, but also a natural perfume plant.Patchouli concrete and oil can be extracted from the plant.Single factor experiments and orthogonal experiments were adopted to investigate the effects of extraction pressure, extraction temperature, carbon dioxide flow rate and extraction time on the yield of the concrete of patchouli stem and leaf with supercritical carbon dioxide fluid.The optimum technical parameters of obtaining the concrete of patchouli stem were extraction pressure 15 MPa, extraction temperature 42℃, carbon dioxide flow rate 37 L·h-1, extraction time 3.5 h.The yield of the concrete of patchouli stem was 1.28%.The optimum technical parameters of obtaining the concrete of patchouli leaf were extraction pressure 18 MPa, extraction temperature 39℃, carbon dioxide flow rate 37 L·h-1, extraction time 3.5 h.The yield of the concrete of patchouli leaf was 2.53%.展开更多
通过单因素试验考察了超临界二氧化碳萃取芫荽籽油中萃取压力、二氧化碳流量、萃取时间、萃取温度对芫荽籽油萃取率的影响,得出萃取的较佳工艺条件为:萃取压力20 MPa、二氧化碳流量30 L/h、萃取时间180 m in、萃取温度42℃,芫荽籽油萃...通过单因素试验考察了超临界二氧化碳萃取芫荽籽油中萃取压力、二氧化碳流量、萃取时间、萃取温度对芫荽籽油萃取率的影响,得出萃取的较佳工艺条件为:萃取压力20 MPa、二氧化碳流量30 L/h、萃取时间180 m in、萃取温度42℃,芫荽籽油萃取率大于12%。对所得的芫荽籽油中脂肪酸组成进行了分析。展开更多
文摘Supercritical CO 2 extraction was applied to the extraction of flavonoids from licorice. The optimized conditions are: CO 2 pressure 30 MPa, temperature 50 ℃, solid to entrainer ratio 1∶5(g/mL), CO 2 flow rate 10 kg/h, separation pressure 5.5 MPa temperature 40 ℃. Results showed that the flavonoids yield obtained by supercritical CO 2 extraction was 2.2 times that obtained by common solvent extraction method.
文摘Patchouli is not only a Chinese herb, but also a natural perfume plant.Patchouli concrete and oil can be extracted from the plant.Single factor experiments and orthogonal experiments were adopted to investigate the effects of extraction pressure, extraction temperature, carbon dioxide flow rate and extraction time on the yield of the concrete of patchouli stem and leaf with supercritical carbon dioxide fluid.The optimum technical parameters of obtaining the concrete of patchouli stem were extraction pressure 15 MPa, extraction temperature 42℃, carbon dioxide flow rate 37 L·h-1, extraction time 3.5 h.The yield of the concrete of patchouli stem was 1.28%.The optimum technical parameters of obtaining the concrete of patchouli leaf were extraction pressure 18 MPa, extraction temperature 39℃, carbon dioxide flow rate 37 L·h-1, extraction time 3.5 h.The yield of the concrete of patchouli leaf was 2.53%.
