Novel process for producing puerarin by utilizing root of kudzu vine

Abstract

The invention provides a novel process for producing puerarin by utilizing root of kudzu vine. According to the process, starch and puerarin in the root of kudzu vine can be respectively extracted. According to the process, the flesh part which is rich in starch and the high-puerarin-content bast part of the root of kudzu vine are separated for performing independent extraction; because puerarin is insoluble in water and soluble in alkaline water, low-alkalinity lime water treatment is adopted in the process of extracting the starch, the content of pueraria root flavone in the starch can be fully kept, and the quality of the edible starch is improved; when puerarin is extracted from the bast part of the root of kudzu vine, non-toxic and safe ethanol serves as a solvent, the extracting process is the traditional reflux extraction process, and coarse puerarin is obtained; and coarse puerarin is subjected to two-step separation, coarse puerarin is subjected to crude separation in the first step through macroporous resin, the purity of puerarin is further improved, puerarin is further refined by employing silica gel column chromatography, and high-purity puerarin with the content of more than or equal to 98 percent is produced. The resources are fully utilized, and the production method is simple and feasible and can be suitable for industrial production.

Description

technical field [0001] The invention relates to a new process for producing puerarin by using puerarin, which can separately extract starch and puerarin in pueraria. Background technique [0002] At present, most enterprises adopt traditional production methods when extracting puerarin from puerarin, and the specific operation is as follows. [0003] 1. Pueraria pretreatment: Pueraria cleaning-drying-crushing. [0004] 2. There are usually three extraction methods, as follows. [0005] 2.1 Ultrasonic-assisted extraction method: kudzu root powder→ultrasonic extraction→filtering→concentration under reduced pressure→passing through column→washing with water→washing with alcohol→concentration under reduced pressure→vacuum drying→crude puerarin extract. [0006] 2.2 Water extraction method: kudzu root dry powder→water extraction→filter to obtain filtrate and residue→extract residue with 5% NaOH aqueous solution→filter to obtain filtrate→combine filtrate twice→concentrate under ...

AI Technical Summary

Problems solved by technology

[0008] Although the above methods for extracting puerarin can obtain puerarin crude extract, the operation period is long, the process is complicated, the yield is not high, and the content of puerarin obtained through testing is not high; the most important thing is that puerarin contains a large amount of The starch can not be fully utilized, resulting in a waste of resources