Citation:
FU Yu-Jie, HOU Chun-Lian, LIU Wei, ZHAO Wen-Hao, ZHU Yuan-Gang, SHI Xiao-Guang. Extraction of Isoliquiritigenin with Supercritical CO2[J]. Chinese Journal of Applied Chemistry,
;2007, 24(1): 67-70.
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The process of extraction of isoliquiritigenin(ISL) from licorice with supercritical CO2 was studied by both orthogonal and single factors analysis experiments.Factors affecting the yield of ISL including extraction pressure, extraction temperature, kind of entrainer, ratio of solvent to soild, CO2 flow rate, etc, were optimized, and the results were compared to those of Soxhlet extraction method.It was found that the optimized technological parameters were as follows:extraction pressure 30 MPa, extraction temperature 45℃, entrainer 85% ethanol, the ratio of solvent to solid 5:1, CO2 flow rate 10 kg/h, separation pressure 5.5 MPa, separation temperature 35℃.At the optimized conditions, the extraction yield of ISL was 0.035% and the content of ISL in extract was 0.84%, which were 3.5 and 3.0 times those of by Soxhlet extraction, respectively.Supercritical CO2 extraction of ISL requires less extraction time and solvent, with a higher extraction yield, and no pollution, it is thus an efficient and rapid method for extracting ISL from licorice.
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Keywords:
- flicorice,
- isoliquiritigenin,
- supercritical CO2 extraction
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