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Method for preparing low-caffeine high-tea polyphenol tea powder

A technology of low caffeine and tea polyphenols, applied in the field of bioengineering, can solve the problems of tea polyphenols toxic substances, complex process of tea polyphenols, harm to human health, etc., and achieve the effect of environmental friendliness, low cost and high safety

Inactive Publication Date: 2011-03-23
温尧林 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The object of the present invention is to provide a kind of low caffeine, high tea polyphenols tea powder and its preparation method, described this low caffeine, high tea polyphenols tea powder and its preparation method will solve the industrial problems in the prior art The tea polyphenols prepared by the method contain toxic substances that endanger human health, and at the same time, the technical problems of complex processes, high equipment and operating costs for preparing tea polyphenols in the prior art must be solved

Method used

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  • Method for preparing low-caffeine high-tea polyphenol tea powder
  • Method for preparing low-caffeine high-tea polyphenol tea powder

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preparation example Construction

[0022] The invention provides a method for preparing tea powder with low caffeine and high tea polyphenols, which comprises a step of extracting tea leaves and rough filtering, a step of ultra-high-speed centrifugation of the filtrate after rough filtering, and a step of using the centrifuged liquid through large pores The steps of resin adsorption include a step of separating caffeine and tea polyphenols by graded eluting with ethanol aqueous solution, a step of concentrating the eluate of tea polyphenols, and a step of drying the concentrate.

[0023] Further, in the steps of tea extraction and coarse filtration, add water to the tea leaves, the weight of the water is 8-15 times the weight of the tea raw materials, heat to 50-90°C, stir and extract for 20-60min, filter .

[0024] Further, the steps of tea extraction and coarse filtration can be repeated more than once.

[0025] Further, in a step of separating caffeine and tea polyphenols by graded elution with aqueous etha...

Embodiment 1

[0035] Embodiment 1 The preparation of green tea extract

[0036] Add 2000L pure water to 200kg green tea, heat to 80°C, stir (speed 20r / min) to extract for 35min, filter, the filtrate is cooled to 38°C by heat exchange, add 1000L pure water to the filter residue, stir and elute at room temperature for 30min, and combine the extracts; 10000r / min continuous centrifugation to obtain clarified green tea extract, which is put into the clarified liquid storage tank.

Embodiment 2

[0037] Embodiment 2 Preparation of low caffeine and high tea polyphenol tea powder of the present invention

[0038] The green tea extract in Example 1 was adsorbed by macroporous resin ADS-F8 (Tianjin Nankai Hecheng Technology Co., Ltd.); according to the amount of 1.5L resin (fully swollen in 35°C water) for 1kg of tea leaves, the sample was loaded for adsorption, and the After the sample is finished, after washing with water for 8CV (column bed volume), three column volumes are eluted with 100% ethanol, diluted with water, concentrated to no alcohol smell, and spray-dried to obtain low caffeine and high tea polyphenol tea powder.

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Abstract

The invention discloses a method for preparing low-caffeine high-tea polyphenol tea powder, which comprises the following steps of: extracting and roughly filtering tea leaves, centrifuging filtrate subjected to rough filtration at an ultrahigh speed, adsorbing centrifugate by using macroporous resin, performing graded elution by using aqueous solution of ethanol to separate caffeine from tea polyphenols, concentrating tea polyphenol eluent and drying concentrate. The tea polyphenol content of the low-caffeine high-tea polyphenol tea powder prepared by the method is more than or equal to 85 percent, wherein the catechin content is more than or equal to 60 percent, the EGCG content is more than or equal to 35 percent and the caffeine content is less than or equal to 1 percent. The method has the advantages of simple process, high extraction ratio, low cost and high product quality and safety; and the low-caffeine high-tea polyphenol tea powder prepared by the method can be used for preparing health-care food or cosmetic.

Description

Technical field: [0001] The invention relates to the field of bioengineering, in particular to tea powder, in particular to a method for preparing tea powder with low caffeine and high tea polyphenols. Background technique: [0002] Tea Polyphenols is the general term for polyphenols in tea, including flavanols, anthocyanins, flavonoids, flavonols and phenolic acids. Among them, flavanols (catechins) are the most important, accounting for about 70% of the total amount of tea polyphenols. Tea polyphenols, also known as tea tannins or tea tannins, 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. They can remove excess free radicals in the body and prevent lipid peroxidation. Improve the body's immunity, delay aging and so on. [0003] Tea also contains a large amount of caffeine, which is highly irritating. Long-term intake can cause serious adverse reactions, especially not s...

Claims

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Application Information

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IPC IPC(8): A23F3/18A23F3/20
Inventor 温尧林李坤
Owner 温尧林
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