Preparation method of bamboo leaf flavone

Abstract

The invention discloses a preparing method for a bamboo leaves flavone extractive, which includes the following steps: breeds with high flavone content which are selected form 30 kinds of bamboo leaves can be taken as the production materials trough HPLC method; the selected bamboo leaves are dried at low temperature and lucifuge and smashed; and the C1-C3 is used for extracting; the lixivium is filtered and condensed in vacuum so as to obtain bamboo leaves gross extractive; and the gross extractive is purified through centrifugalizing, ceramic membrane, ultrafiltration membrane, nanofiltration membrane so as to obtain the bamboo leaves processed liquid; and the bamboo leaves processed liquid is separated and purified by certain size polymeric adsorbent resin, and is cooled to dry in vacuum or to dry with sprayer, so as to obtain the bamboo leaves flavone extractive with 40% to 65% of the flavone content.

Description

technical field [0001] The invention relates to the technical field of plant extracts, in particular to a method for extracting flavonoids from bamboo leaves and its preparation method, in particular to using bamboo leaves with high flavonoid content and wide distribution as raw materials, and ceramic membranes with specific apertures , ultrafiltration and nanofiltration of specific molecular cut-offs and special macroporous resins are well combined for purification. Background technique [0002] Bamboo is a class of plants belonging to the Gramineae Bambusadea (Bambusadea). There are about 70 genera and 1225 species in the world. Bamboo plants are naturally distributed in the tropical, subtropical and warm temperate regions of the earth between 46° north latitude and 47° south latitude, and are mainly distributed in tropical and subtropical regions of Asia, Africa, North and South America, Oceania and corresponding islands in the Pacific Ocean , with the tropical and subtr...

AI Technical Summary

Problems solved by technology

[0005] At present, there are many inventions and creations in the use of bamboo leaves in China. Patent No. 200310107871.5 is a Chinese patent on bamboo leaf antioxidants and their uses. See the composition of bamboo leaf antioxidants and their applications in some fields. The published application number is 98104564.2. Chinese invention patent---the production method of extracting flavonoids extract or powder from bamboo leaves provides a method for producing bamboo leaf flavonoids, but these technologies are still in the laboratory stage, and some technologies use a large amount of organic solvents. There are problems such as solvent loss and easy environmental pollution. The Chinese patent No. 200610053436.2 extracts the production process of bamboo leaf flavonoids from bamboo leaves, which promotes a technology for the development and utilization of bamboo leaf resources, but it is too general. The raw materials are not well selected, and the membrane tube and resin are not selected during the separation and purification process. At the same time, there is no good coupling between the membrane and the resin, so there are many problems in production and application. How to design a set that can stick It is the key to ensure the comprehensive utilization of the active ingredients of bamboo leaves, and to use the economical production process for the production and application.

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