Process for extracting ursolic acid from fructus ligustri lucidi leaf

A technology of ursolic acid and privet leaves, applied in the direction of steroids, organic chemistry, etc., can solve the problems of large processing volume of "three wastes", high cost of ursolic acid, environmental pollution, etc., and achieve easy processing volume and low cost , the effect of the simple method

Inactive Publication Date: 2002-07-17
WUHAN UNIV
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  • Summary
  • Abstract
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Problems solved by technology

[0005] Although ursolic acid can be synthesized by chemical methods, this kind of method not only has a large amount of "three wastes" and is difficult to deal with, it is easy to pollute the environment, and the cost of obtained ursolic acid is relatively high

Method used

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Embodiment Construction

[0011] The pulverized privet leaves are extracted 2-3 times with 5-6 times (W / V) ethanol back flow to obtain a liquid extract, and the ethanol is recovered. The above-mentioned extract is fully washed with water and dried at 80°C to obtain dry Extract, after dissolving dry extract in ethanol, decolorize with activated carbon, add water to precipitate a large amount of precipitate after recovering ethanol, adjust the pH value to 2-2.5, separate and collect the precipitate, wash with water until neutral, and dry in vacuum. Obtain the crude extract whose main component is ursolic acid.

[0012] Dissolve the above-mentioned crude extract in hot ethanol, add silica gel, mix well, evaporate the ethanol under the infrared lamp, and put it on the column by dry method, that is, evenly load 200 mesh silica gel G (Qingdao Haiyang Produced by a chemical factory, used for thin-layer chromatography), pumped under reduced pressure, dissolved 3 grams of the sample in an appropriate amount of ...

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Abstract

The method for extracting ursolic acid from ligustrum leaf includes the following steps: making pulverized ligustrum leaf undergo the process of counter-current extraction with reflux to obtain liquid extract, recovering ethyl alcohol, fully washing said liquid extract with water, drying to obtain dried extract, dissolving said dried extract in ethyl alcohol and decoloring, recovering ethyl alcohol from the decoloring liquor and adding water to separate out lots of precipitate, regulating pH value to 2-2.5, separating and collecting precipitate, washing with water to neutrality and vacuum drying to obtain crude extract whose main component is ursolic acid. said invention used ethyl alcohol can be recovered and reused, and the waste residue produced after extraction can be used as fertilizer.

Description

1. Technical field [0001] The invention relates to a method for extracting ursolic acid from privet leaves. 2. Background technology [0002] Ligustrum is a plant of the genus Ligustrum of the Oleaceae family. The scientific name is Ligustrum Lucidum Ait. It is a large evergreen shrub or small tree in all seasons. There are about 50 species in the world, and there are 38 species in my country. They are widely distributed in East China, South China, Southwest China and Central China is rich in plant resources and widely distributed. [0003] With the deepening of pharmacological research, it is found that privet plants have various physiological activities, but the research on the chemical constituents of privet plants is not enough. For a long time, the parts of the privet plant we have studied have not been fully utilized, basically not used as medicine, and there is a lot of waste. [0004] Ursolic acid is a triterpenoid compound with the molecular formula C 30 h 18 o ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07J63/00
Inventor 樊明文边专王茜谭文界
Owner WUHAN UNIV
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