Process for extracting lotus leaf flavone

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...