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- W2378849462 abstract "Objective To study processing conditions of supercritical CO_2 extraction volatile oils from Heracleum hemsleyanum Diels.Methods The influence of extraction pressure,temperature,and flow rate of CO_2 on the extraction rate was discussed by orthogonal experiment.The experiment results were compared with the water vapor distillation.Results By comparing the grading of these factors,the influence of extraction pressure on the extraction rate was the most obvious,extracion temperature was less,and flow rate of CO_2 was the least.Conclusion The extraction rate of volatile oils from Heracleum hemsleyanum Diels by supercritical CO_2extraction process is higher than that of water vapor distillation,and the optimized extraction conditions are:extraction pressure 25MPa,extraction temperature 45℃ and flow rate of CO_2 20L/h,and the yield of volatile oils is 0.65%." @default.
- W2378849462 created "2016-06-24" @default.
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- W2378849462 date "2007-01-01" @default.
- W2378849462 modified "2023-09-24" @default.
- W2378849462 title "Study on Supercritical CO_2 Extraction of Heracleum hemsleyanum Diels" @default.
- W2378849462 hasPublicationYear "2007" @default.
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