Method for extracting resveratrol from polygonum cuspidatum

A technology of resveratrol and knotweed, applied in chemical instruments and methods, preparation of organic compounds, organic chemistry, etc., can solve problems such as harmful solvent residues, and achieve the effects of easy operation, less equipment, and fewer operation steps

Inactive Publication Date: 2011-01-19
湖南健源生物科技有限责任公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The method of the present invention is used to produce resveratrol, and the whole process only uses ethanol as a solvent, which solves the residual problem of harmful solvents

Method used

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Embodiment Construction

[0006] specific implementation plan

[0007] Polygonum cuspidatum raw material is crushed into the granule of 3mm, adds the composite enzyme and 60% water that the weight ratio of 2:1:2 is formulated by β-glucosidase, cellulase, flour by raw material weight 5%, piles up at room temperature 12 days of natural fermentation. Add 95% ethanol at 50°C to the fermented raw material in a ratio of 1:5, stir, extract 3 times, the extraction time is 3, 2, and 1 hour respectively, combine the extracts, filter, reduce the pressure to -0.08Mpa and concentrate to alcohol 60%, stirred and cooled in a freezing tank for 1 hour, filtered, the filtrate was concentrated under reduced pressure until it had no alcohol smell, filtered with suction to obtain a precipitate, and dried in vacuo to obtain 58% crude resveratrol. The crude product is refined again, and more than 98% resveratrol products can be obtained.

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Abstract

The invention relates to a method for extracting resveratrol from polygonum cuspidatum. The method comprises the following steps of: pulverizing dry roots and stems of polygonum cuspidatum into particles of 1-5mm; adding a complex enzyme special for the polygonum cuspidatum and water by a certain proportion; stacking for 10-15 days at room temperature for naturally fermenting; then adding 95 percent alcohol at 40-60 DEG C and dynamically extracting for three times; combining extraction solutions, filtering and decompressing to an alcohol degree of 60-70 percent; cooling and filtering; depressing and concentrating a filter solution until no alcohol smell exists; carrying out pumping filter to obtain a precipitate; and drying in vacuum to obtain a crude resveratrol product of 50-60 percent.By adopting the method to produce the resveratrol, only one solvent of alcohol is used in the whole process, thereby the problem of residues of harmful solvents is solved; and moreover, the yield canbe improved by 8-15 percent compared with an original method, and the product cost can be reduced by 25-30 percent. The method has the advantages of fewer operation steps, less used equipment and easy operation by labor power.

Description

technical field [0001] The invention relates to a method for extracting resveratrol from Polygonum cuspidatum. Background technique [0002] Polygonum cuspidatum is the dry rhizome of the perennial shrub-like herb Polygonum cuspidatum, which contains a large amount of resveratrol glycosides (3,4',5-trihydroxystilbene) and resveratrol (resveratrol). The role of resveratrol is mainly manifested in its antioxidant properties. It is widely used in health food and cosmetics, and it has a good effect on the health care assistant treatment and beauty of cardiovascular diseases. It can reduce blood lipids and the incidence of coronary heart disease, regulate the ratio of low-density lipoprotein (LDL), reduce platelet aggregation and thromboxane B2 production. Resveratrol can also delay aging and anti-tumor, which has attracted widespread attention from the international community. At present, there are two main production processes for extracting resveratrol from Polygonum cuspida...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C39/21C07C37/72C07C37/70
Inventor 乐雅武覃连成
Owner 湖南健源生物科技有限责任公司
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