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
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[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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