Industrial preparation method of theaflavin

A technology of theaflavins and theaflavins esters, which is applied in the fields of organic chemistry and fermentation, can solve the problems of restricting the large-scale production of theaflavins, complex and expensive separation and purification procedures, etc. The effect of increased oxygen capacity
CN101691591AInactive Publication Date: 2010-04-07ZHEJIANG PAINUO BIO TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
ZHEJIANG PAINUO BIO TECH
Publication Date
2010-04-07
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention relates to an industrial preparation method of theaflavin, which comprises the following steps: (1) preparing an ethyl acetate solution containing rich tea polyphenol; (2) respectively adding pulverized fresh tea leaves and the ethyl acetate solution into a oxidation-fermentation tank, orderly adding ethyl acetate and a buffering solution, introducing air at normal temperature, and stirring, oxidizing and fermenting to obtain the theaflavin ester-phase solution; (3) filtering the theaflavin ester-phase solution, concentrating and washing to remove impurities; (4) concentrating the water-phase solution, and spray-drying to obtain low-specification dry theaflavin powder; (5) concentrating the ester-phase solution to recycle ethyl acetate, and adding water so that the theaflavin is dissolved in the water; (6) centrifugally filtering the theaflavin water solution to obtain a pure theaflavin solution; (7) and concentrating the theaflavin solution, and spray-drying to obtain the dry theaflavin powder. The method of the invention simultaneously enhances the yield and the quality of the theaflavin, saves the energy and the man hours and reduces the emission of waste water.
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Description

(1) Technical field

[0001] The invention relates to an industrialized method for preparing theaflavins from tea leaves. (2) Background technology

[0002] In recent years, as modern medical research has discovered that theaflavins in black tea have strong biological activity, their superiority in function and their application in natural medicine, functional food and beverage, and daily chemical industry have become more and more broad. Extracting theaflavins from black tea is not economically cost-effective, so different methods for preparing theaflavins have been reported one by one. Among them, the preparation of theaflavins by in vitro oxidation (enzymatic oxidation or chemical oxidation) of tea polyphenols is a future trend. Although finding new enzyme sources and their immobilization technology and new oxidants is an important task for the preparation of theaflavins from tea polyphenols in vitro simulated oxidation, but this is an aerobic process, so "two-liquid phase...

Claims

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