A process for extracting and purifying tea polyphenols with spherical polyamide resin

Abstract

The invention discloses a technique for extracting and purifying tea polyphenols by using spherical polyamide resin, in which tea leaves are extracted and filtered; the filtered tea extract solution is loaded into a chromatographic column equipped with spherical polyamide chromatographic resin Carry out chromatography; first use citric acid aqueous solution as the eluent to wash away caffeine and pigment, then use ultrapure water, and finally use ethanol aqueous solution as the mobile phase to elute tea polyphenols; finally wash the collected tea polyphenols Deliquoring and concentrating crystallization to obtain a colorless and transparent tea polyphenol crystallization product; the present invention uses a spherical polyamide resin to extract and purify tea polyphenols, the extraction method is simple, green and pollution-free, and the production cost is low, only one step is required Analysis and purification can meet the requirements of tea polyphenols purity greater than 99%, and extraction rate greater than 90%, and the prepared tea polyphenols have high yield, high extraction rate, and high quality, which can meet the requirements of more fields, so as to meet more Extensive market demand.

Description

technical field [0001] The invention relates to the technical field of extracting and purifying natural product active substances, in particular to a process for extracting and purifying tea polyphenols with a spherical polyamide resin. Background technique [0002] Tea polyphenols is the general term for polyphenols in tea, including flavanols, anthocyanins, flavonoids, flavonols, and phenolic acids. Tea polyphenols are one of the main components that form the color and aroma of tea, and are also one of the main components that have health care functions in tea. Tea polyphenols have a wide application value and are widely used in medicine, daily cosmetics, food and other fields. Studies have shown that the active substances of tea polyphenols have many unique functions such as scavenging free radicals, detoxification, anti-aging, anti-cancer, and lowering blood lipids; they also have anti-radiation effects, which can effectively prevent radioactive substances from invading...

AI Technical Summary

Problems solved by technology

In recent years, enterprises that carry out deep processing of tea and use tea polyphenols as raw materials for products have sprung up like bamboo shoots after rain. However, the quality of products produced by most enterprises is not high, and enterprises with strong competitive advantages such as product quality, scale, and cost are not. There are not many products that can apply high-purity and low-impurity tea polyphenols active substances to health care products. In this regard, many companies or researchers have made a lot of efforts in the extraction and purification of tea polyphenols. Research and exploration, but there are problems such as low extraction efficiency, poor purity; difficult separation, cumbersome methods; large amount of solvent, long production cycle; large investment in equipment, etc.

In addition, in the existing technology of extracting caffeine, chloroform is basically used for extraction, but chloroform has the adverse effect of causing cancer. Using chloroform as an extraction agent will affect the health effects of tea polyphenols, and some studies have shown that tea polyphenols The higher the content, the lighter the color, and the tea polyphenol product obtained after extraction with chloroform is brown, and the purity of the product is low

In addition, the tea polyphenols extracted in the traditional process may also have the problem of excessive heavy metal ions

These existing technical problems have greatly affected the quality of tea polyphenols and greatly limited the application of tea polyphenols

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