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Process for extracting lotus leaf flavone

A lotus leaf flavonoids and extraction method technology, applied in the direction of organic chemistry, etc., can solve the problems of failure to meet the requirements of extract purity and low extract purity, and achieve the effect of safe extraction method, good water solubility, and stable chemical properties

Inactive Publication Date: 2004-03-17
中国科学院武汉植物研究所
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  • Summary
  • Abstract
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Problems solved by technology

The above method of extracting lotus leaf flavonoids with acidic water and 50% ethanol to obtain the initial extract of lotus leaf flavonoids has the disadvantage that the extract of lotus leaf flavonoids has a low purity and fails to reach the national second-class new drug pair extract Purity requirements

Method used

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Examples

Experimental program
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Embodiment Construction

[0018] 1. Wash with 5 kg of dried lotus leaves, air-dry and crush to obtain lotus leaf powder;

[0019] 2. Put the lotus leaf powder into the percolation device, use 50-75 liters of 70%-85% ethanol for percolation extraction, concentrate the percolation liquid to 5 liters under reduced pressure, and filter to remove the solid precipitate to obtain the concentrated percolation liquid;

[0020] 3. Dilute the concentrated percolation liquid with 15-25 liters of distilled water and slowly add it to the upper end of the D140 macroporous adsorption resin column. The lower layer of the macroporous adsorption resin column is equipped with 6-7 kg of D140 macroporous adsorption resin. Wash the macroporous adsorption resin column with distilled water, then wash the macroporous adsorption resin column with 40-60 liters of 10-15% ethanol, then wash the macroporous adsorption resin column with 40-60 liters of 40-50% ethanol, concentrate under reduced pressure for 40-50 % ethanol eluate to 2...

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Abstract

The present invention discloses the extraction process of lotus leaf flavone. Fine lotus leaf flavone powder is prepared with lotus leaf as material and through five links of pre-treatment, percolating extraction, macroporous resin adsorption to separate, purification with organic solvent and post-treatment. The fine lotus leaf flavone powder of the present invention has stable chemical property, less impurity, high water solubility and other features; has flavone content of 50-70 wt%; and reaches the requirement as class-II medicine material.

Description

Technical field: [0001] The invention relates to a method for extracting medicinal chemical components from plants, more particularly to a method for extracting lotus leaf flavonoids from lotus leaves. Background technique: [0002] Lotus leaf flavonoids are extracted and separated from lotus leaves. Its main functions are: anti-oxidation, cardiovascular protection and antibacterial. Macroporous adsorption resin technology is an existing technology, which is mainly used for adsorption and enrichment of organic compounds. The literature "Research on Extraction of Flavonoids and Alkaloids from Lotus Leaf" [Chen Haiguang, Yu Yigang, etc., "Food Science" 2002, 23(1).69-72] reported the functional components of flavonoids and alkaloids in lotus leaves The water extraction process uses water as a solvent, soaks the lotus leaf dry powder with 30 times the water at 80-90°C for 1.5 hours to extract the flavonoids and alkaloids in the lotus leaf, and the extract is acidic . The doc...

Claims

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Application Information

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IPC IPC(8): C07D311/30
Inventor 王有为袁晓龚复俊王暐
Owner 中国科学院武汉植物研究所
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