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Method for extracting a plurality of kinds of active ingredients from tea leaves simultaneously

A technology of active ingredients and tea leaves, applied in organic chemistry, carboxylic acid amide separation/purification, etc., can solve the problems of unsatisfactory purity and yield of tea polyphenols, low content of active ingredients, and the presence of solvents, etc., achieving short extraction time, Less active material loss and easy resin regeneration

Inactive Publication Date: 2012-09-19
福建省安溪县南洋茶厂
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] There are many domestic patents on the method of extracting tea polyphenols and other functional components from tea, such as Chinese patent applications: 93105511.3, ZL98111572.1, 200510042629.3 and Chinese patents ZL200810107066.5, ZL200910111284.0, etc. have reported on the extraction method, However, they all have disadvantages such as low content of extracted active ingredients, poor extraction rate, or solvent residues, and it is also impossible to extract multiple active ingredients such as caffeine, theanine, tea polyphenols, and tea polysaccharides from tea at the same time.
At present, there are relatively few patents related to the simultaneous extraction of multiple active ingredients from tea leaves. Among them, Chinese patent application 200410015905.2 discloses a microwave extraction method for comprehensively extracting tea polysaccharides, tea polyphenols, theanine and caffeine from tea leaves. The purity and yield of tea polyphenols obtained by this method are not ideal; in addition, Chinese patent application 201010141764.4 also discloses a comprehensive separation and extraction of tea polysaccharides, theanine, tea polyphenols and caffeine in tea leaves using inorganic zeolite molecular sieves. solvent extraction method, but the overall extraction rate is still poor

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  • Method for extracting a plurality of kinds of active ingredients from tea leaves simultaneously
  • Method for extracting a plurality of kinds of active ingredients from tea leaves simultaneously

Examples

Experimental program
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Effect test

Embodiment 1

[0044] 1) 500g of tea powder, add 5Kg of water, soak and extract at 40-60℃ for 10-30 minutes under the action of light waves, filter, add 5Kg of water to the tea dregs, soak and extract at 40-60℃ for 10-30 minutes under the action of light waves, filter Remove the filter residue, combine the two soaking extracts, and concentrate the soaking extracts to 1 / 5 of the original volume;

[0045]2) After immersing the cationic resin in distilled water, repeat the treatment with acid and alkali twice, then transform it with acid, and finally wash it to neutral with distilled water. The cationic resin is WA-2;

[0046] 3) Soak the adsorption resin in distilled water, wash it with ethanol until it is colorless, and the adsorption resin is 92-2;

[0047] 4) The above-mentioned tea steeping extract was passed through the cationic resin column at a speed of 25mL / min, and the effluent was passed through the adsorption resin column at a speed of 20mL / min. First remove the caffeine on the cat...

Embodiment 2

[0051] 1) 500g of tea powder, add 6Kg of water, soak and extract at 40-60°C for 10-30 minutes under the action of light waves, filter, add 4Kg of water to the tea residue, soak and extract at 40-60°C for 10-30 minutes under the action of light waves, filter Remove the filter residue, combine the two soaking extracts, and concentrate the soaking extracts to 1 / 5 of the original volume;

[0052] 2) Soak the cationic resin in distilled water, repeat the treatment with hydrochloric acid and sodium hydroxide twice, then transform it with hydrochloric acid, and finally wash it with distilled water until neutral. The cationic resin is D135;

[0053] 3) Soak the adsorption resin with distilled water, wash it with ethanol until it is colorless, and the adsorption resin is 92-3;

[0054] 4) The above-mentioned tea soaking extract was passed through the cationic resin column at a speed of 35mL / min, and the effluent was passed through the adsorption resin column at a speed of 25mL / min. Fi...

Embodiment 3

[0058] 1) 500g of tea powder, add 7.5Kg of water, under the action of light wave, soak and extract at 40-60°C for 10-30 minutes, filter, add 2.5Kg of water to the tea residue, and soak and extract at 40-60°C for 10-30 minutes under the action of light wave , filter to remove the filter residue, combine the two soaking extracts, and concentrate the soaking extracts to 1 / 5 of the original volume;

[0059] 2) After immersing the cationic resin in distilled water, repeat the treatment twice with 5% hydrochloric acid and 5% sodium hydroxide, then transform it with 5% hydrochloric acid, and finally wash it with distilled water to neutrality. The cationic resin is preferably 003× 7;

[0060] 3) After soaking the adsorption resin with distilled water, wash it with ethanol until it is colorless, and the adsorption resin is NK-S3;

[0061] 4) Pass the above-mentioned tea steeping extract through the cationic resin column at a speed of 40mL / min, and then pass the effluent through the ad...

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Abstract

The invention discloses a method for extracting a plurality of kinds of active ingredients from tea leaves simultaneously. Steps include subjecting tea leaves to light wave digestion and filteration; absorbing caffeine and theanine by cationic resins, obtaining caffeine and theanine through elution; absorbing tea polyphenols by adsorbent resins and obtaining tea polyphenols through elution; and collecting effluent liquids passing through cationic resins and adsorbent resins, and concentrating, deproteinizing and precipitating effluent liquids with ethanol to obtain tea polysaccharide. The method has the advantages that water serves as solvents, light wave extracting is used, the time is short, extraction rate is high, loss of active substances is little, and the cost is low; four kinds of active ingredients of caffeine, theanine, tea polyphenols and tea polysaccharide can be extracted simultaneously; adsorbent resins are used, the process is simple, energy consumption is low, pollution is small, and resins are easy to regenerate and can be recycled; and extraction rate is high, separating effect is good, and the purity of obtained active ingredients is high.

Description

technical field [0001] The invention belongs to the technical field of tea deep processing, and in particular relates to a method for simultaneously extracting multiple active ingredients from tea. Background technique [0002] In my country, tea drinking has a long history and a large number of people. my country's tea resources are abundant, but the utilization rate is extremely low. Except for a small amount of tea that is processed into high-grade commercial tea, a large amount of it is medium and low-grade tea (all of which are unsalable to varying degrees). Studies have shown that the active ingredients of middle and low-grade teas are generally not inferior to those of high-grade teas, and some ingredients are even higher than those of high-grade teas. Therefore, vigorously developing tea deep processing technology, extracting and recovering active ingredients from middle and low-grade tea has multiple meanings to change the unsalable situation of middle and low-gra...

Claims

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Application Information

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IPC IPC(8): C07D473/12C07C237/06C07C231/24C07G99/00C08B37/00
Inventor 苏双科
Owner 福建省安溪县南洋茶厂
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