New process for preparing extracts of radix tetrastigmae

Abstract

The invention discloses a method for efficiently extracting flavonoid from tetrastigma hemsleyanum. The method comprises the steps of: air drying tetrastigma hemsleyanum, mincing, adding water, extracting from an ultrasonic extractor, concentrating the extractive solution to a certain volume, decolorizing with activated carbon, performing liquid extraction with ethyl acetate by using a cavitation suspension extraction and separation device, recovering the ethyl acetate, performing liquid extraction of the aqueous fraction with chloroform, recovering the chloroform, collecting the aqueous fraction, concentrating, purifying with macroporous adsorption resin, eluting with 50% water and ethanol in sequence, collecting the eluent with 50% of ethanol, recovering the solvent, and drying to obtain tetrastigma hemsleyanum extract.

Description

A new method for preparing the extract of cloverleaf technical field The invention relates to the technical field of medicine, and relates to a high-efficiency extraction process of a trifoliate leaf extract, in particular, the extract containing flavonoids is extracted from the trifoliate greens as a raw material. Background technique The methods for extracting proanthocyanidins from Clover are basically traditional chemical solvent extraction and supercritical fluid extraction. However, both extraction processes have many drawbacks. Although the traditional organic solvent extraction method is simple to operate, it has disadvantages such as large energy and raw material consumption, low extraction efficiency, and large industrial pollution emissions. Although the supercritical CO2 extraction technology has greatly improved the extraction efficiency, the equipment required by this type of method is more complicated, the solvent selection range is narrow, and the product ...

AI Technical Summary

Problems solved by technology

Although the traditional organic solvent extraction method is simple to operate, it has disadvantages such as large energy and raw material consumption, low extraction efficiency, and large industrial pollution emissions.

Although supercritical CO2 extraction technology has greatly improved the extraction efficiency, the equipment required by this type of method is more complicated, the solvent selection range is narrow, and the product stability is poor, which is not conducive to large-scale production