Method for preparing resveratrol from giant knotweed rhizome

A technology of resveratrol and Polygonum cuspidatum, applied in chemical instruments and methods, preparation of organic compounds, organic chemistry, etc., can solve the problem of low product yield, achieve high yield, low cost, and simple operation

Inactive Publication Date: 2002-03-27
上海汇谷生物技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Another kind is directly extracted with solvent, separated from components such as resveratrol glycosides, and the product yield is low

Method used

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  • Method for preparing resveratrol from giant knotweed rhizome
  • Method for preparing resveratrol from giant knotweed rhizome

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0010] Take fresh Polygonum cuspidatum I, 100 g contains 0.16 g of resveratrol (excluding glycosides), weigh 500 g, crush it into a slurry, place it at 30±2°C for 96 hours, and stir for 5 minutes per hour during the standing process. It was extracted with ethyl acetate, the solvent was recovered, and then purified to obtain 1.89 g of white crystals, that is, resveratrol. If the Polygonum cuspidatum pulp is directly extracted with ethyl acetate and purified in the same way, 0.61 g of resveratrol is obtained.

Embodiment 2

[0012] Take fresh Polygonum cuspidatum I, it is determined that 100g contains 0.16g of resveratrol (excluding glycosides), weigh 500g, crush it into a slurry, place it at 40±2°C for 72 hours, and stir for 5 minutes every 2 hours during the standing process , extracted with ethyl acetate, recovered the solvent, and purified to obtain 1.80 g of resveratrol as white crystals.

Embodiment 3

[0014] Take fresh Polygonum cuspidatum II, 100g contains 0.19g of resveratrol (excluding glycosides), weigh 500g, crush it into a slurry, place it at 20±2°C for 96 hours, and stir for 10 minutes every 3 hours during the standing process , extracted with ethyl acetate, recovered the solvent, and then purified to obtain 2.02 g of white crystals, namely resveratrol. If the Polygonum cuspidatum pulp is directly extracted with ethyl acetate and purified in the same way, 0.65 g of resveratrol is obtained.

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Abstract

The method for preparing resveratrol by using bushy knotweed root includes the following steps: using fresh bushy knotweed root and pulping, placing the obtained pulp material in a container, storingfor 24-120 hr. at 10-50 deg.C, and stirring, then using ethyl acetate to make extraction, recovering ethyl acetate, further making purification treatment so as to obtain resveratrol. Because the resveratrol glycoside being in the bushy knotweed root can be converted into resveratrol under the condition without foreign enzyme added. so it has the advantages of simple operation, high yield and low cost.

Description

technical field [0001] The invention relates to a method for extracting and separating resveratrol from Polygonum cuspidatum. Background technique [0002] Polygonum cuspidatum contains resveratrol (resveratrol) and its glycosides. Resveratrol has the effects of lowering blood fat, anti-oxidation, improving microcirculation, lowering blood pressure, and inhibiting staphylococcus and streptococcus. [0003] There are two main methods for extracting resveratrol. One is to enzymatically hydrolyze the glycosides of resveratrol by adding compound enzymes, and then extract, separate and purify with a solvent, and the preparation cost is relatively high. Another kind is directly extracted with a solvent, separated from components such as resveratrol glycosides, and the product yield is low. Contents of the invention [0004] The object of the present invention is to provide a method for preparing resveratrol from Polygonum cuspidatum with simple process, low cost and high yield ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C37/80C07C39/21
Inventor 侯团章曾建国梁桦曾洪斌
Owner 上海汇谷生物技术有限公司
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