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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. shu

Extraction of Isoliquiritigenin with Supercritical CO₂

1.
Key Laboratory of Forest Plant Ecology, Ministry of Education, Northeast Forestry University, Harbin 150040

Received Date: 28 January 2006
Available Online: 8 August 2006
Fund Project: 教育部新世纪优秀人才支持计划(NCET-04-0316) (NCET-04-0316)哈尔滨市科技攻关计划项目(2003AA3CS112,2004AA3CS172-2) (2003AA3CS112,2004AA3CS172-2)

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.
- flicorice,
- isoliquiritigenin,
- supercritical CO₂ extraction
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沈阳化工大学材料科学与工程学院沈阳 110142

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Extraction of Isoliquiritigenin with Supercritical CO2

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Extraction of Isoliquiritigenin with Supercritical CO₂