Method for extracting betulin from birch bark

A technology of betulin and birch bark, which is applied in the fields of phytochemistry and food chemistry, can solve the problems of multiple reflux extractions, cumbersome extraction steps, complicated purification operations, etc., and achieve shortened extraction time, high biological activity of products, and efficient extraction effect of effect
CN101328201AInactive Publication Date: 2008-12-24ZHEJIANG UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
ZHEJIANG UNIV
Publication Date
2008-12-24
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a method for extracting betulin from birch barks, comprising the following steps: firstly, crushed birch barks are added into an ethanol water solution, undergo reflux extraction under auxiliary processing of ultrasonic waves, and then are filtrated for removal of residue, and an extract is obtained; secondly, solid powder is separated out after decompression and concentration of the extract, and then dried to the constant weight so as to obtain betulin coarse products; and thirdly, the betulin coarse products are added into an organic solvent, undergo ultrasonic treatment and then stand, crystals are separated out, and the betulin is obtained after the separated crystals are dried to the constant weight. The method has a simple operation flow, short extraction time, low production cost and high safety, and provides a better method and a better platform for further development and utilization of natural products.
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Description

technical field

[0001] The invention relates to the fields of phytochemistry and food chemistry, in particular to a method for efficiently obtaining betulin from birch bark by using ultrasonic extraction combined with a reflux method. Background technique

[0002] White birch (Betula platyphylla Suk) is a plant of the genus Betula in the Betaceae family. It is a cold-resistant deciduous tree with a height of about 15 meters. Birch bark and birch sap have the effects of clearing away heat and dampness, relieving cough and eliminating phlegm. In recent years, the pharmacological effects of birch bark have been widely valued by scholars at home and abroad. The chemical composition of birch bark is complex and the pharmacological effects are diverse. Its extracts have antibacterial, antiviral, antitumor, lipid-lowering, choleretic and hepatoprotective effects. . Extensive research has been done abroad on the chemical composition and utilization of bark such as Betula verruca a...

Claims

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