Production technology for extracting and purifying polydatin from polygonum cuspidatum

Abstract

The invention relates to a production technology for extracting and purifying polydatin from polygonum cuspidatum. The production technology comprises the steps of drying and crushing fresh polygonum cuspidatum roots and stems, carrying out warm immersion extraction with ethanol, and concentrating an extracting solution to one tenth of the original volume; cooling a concentrate to room temperature and then filtering solid impurities; enabling filtrate to flow through a neutral alumina short and thick column, collecting upper-column effluent, concentrating to be alcohol-free, chilling to room temperature and crystallizing, carrying out suction filtration to obtain macro polydatin crystal; crystallizing the macro polydatin crystal with a proper amount of ethanol, crystallizing and drying to obtain the polydatin. The production technology is simple and convenient to operate, and high in the purity of the extract.

Description

technical field

[0001] The invention relates to a production process for extracting and purifying polydatin from Polygonum cuspidatum. Background technique

[0002] Polydatin (Polydatin) is also known as spruce new glycoside, resveratrol glycoside. It mainly comes from the rhizome and root of Polygonum cuspidatum. It is white needle crystal or powder, easily soluble in methanol and ethanol, slightly soluble in water and ethyl acetate. Antibacterial, scavenging free radicals, regulating blood lipids, lowering cholesterol, and can treat myocardial ischemia, cerebral ischemia, shock and other cardiovascular and cerebrovascular diseases.

[0003] The existing production process for extracting and purifying polydatin from Polygonum cuspidatum has complicated procedures or low purity and high cost. Contents of the invention

[0004] The object of the present invention is to provide a production process for extracting and purifying polydatin from Polygonum cuspidatum rhizomes ...