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Method for extracting and separating high-purity tea polyphenol from tea leaves

A technology for tea polyphenols and tea leaves, applied in the direction of organic chemistry, etc., can solve the problems of residual chemical components, low product purity, long process time, etc., and achieve the effect of saving production time.

Active Publication Date: 2015-06-24
西安正东生物科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the purity of the obtained product is not high, the appearance color is brownish yellow or dark green, there are many residual chemical components and impurities, and the process takes a long time; therefore, it is particularly important to increase the content and purity of the product and improve production efficiency

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] (1), preparation of adsorbent: The adsorbent formula is: 20% of sanitary grade polyaluminum chloride, 80% of chitosan, after combining and mixing the above raw materials, add 4 times of pure water and stir at room temperature until completely dissolved , the active ingredient concentration of the solution at this time is 20%, and it is left to stand at room temperature for subsequent use.

[0018] (2), take by weighing 100 grams of pulverized tea raw material;

[0019] (3), add 600 milliliters of ethanol of 6 times concentration 80% of raw material weight, under the temperature condition of 75 ℃, continuously reflux extraction 3 times, each extraction time is 3 hours;

[0020] (4) The extracts combined three times were vacuum distilled to recover the ethanol in the extract at a temperature of 75°C. After the ethanol was recovered, 100 ml of the prepared adsorption solution was added for impurity adsorption. After standing for 24 hours, it was centrifuged and filtered r...

Embodiment 2

[0026] (1), preparation of adsorbent: The adsorbent formula is: 20% of sanitary grade polyaluminum chloride, 80% of chitosan, after combining and mixing the above raw materials, add 4 times of pure water and stir at room temperature until completely dissolved , the active ingredient concentration of the solution at this time is 20%, and it is left to stand at room temperature for subsequent use;

[0027] (2), take by weighing the pulverized tea raw material: 100 kilograms;

[0028] (3), add 600 kilograms of ethanol of 6 times concentration 80% of raw material weight, under the temperature condition of 75 ℃, continuous reflux extraction 3 times, each extraction time 3 hours;

[0029] (4) The extracts combined three times were vacuum distilled to recover the ethanol in the extract at a temperature of 75°C. After the ethanol was recovered, 100 kg of the prepared adsorption solution was added for impurity adsorption. After standing for 24 hours, it was centrifuged and filtered. r...

Embodiment 3

[0035] (1), preparation of adsorbent: The adsorbent formula is: 20% of sanitary grade polyaluminum chloride, 80% of chitosan, after combining and mixing the above raw materials, add 4 times of pure water and stir at room temperature until completely dissolved , the active ingredient concentration of the solution at this time is 20%, and it is left to stand at room temperature for subsequent use;

[0036] (2), take by weighing the pulverized tea raw material: 200 kilograms;

[0037] (3), add 1200 kilograms of ethanol of 6 times concentration 80% of raw material weight, under the temperature condition of 75 DEG C, continuous reflux extracts 3 times, each extraction time is 3 hours;

[0038] (4) The extracts combined three times were vacuum distilled to recover the ethanol in the extract at a temperature of 75°C. After the ethanol was recovered, 200 kg of the prepared adsorption solution was added for impurity adsorption. After standing for 24 hours, it was centrifugally separate...

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PUM

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Abstract

The invention relates to a method for extracting and separating high-purity tea polyphenol from tea leaves. The method comprises the steps that an adsorption solvent is prepared; crushed tea leaf pieces are extracted under the temperature of 65-75 DEG C; the extracting solution is distilled to recover the solvent, and adsorbs polar impurities by adding an adsorbent and then is filtered; the filtrate is distilled and concentrated; the concentrated solution is extracted by adding ethyl acetate; purified water with equal amount to the concentrated solution is added in the extract liquid and then the solvent is distilled, the remaining water phase is dried by spraying to obtain the high-purity tea polyphenol. The yield of the tea polyphenol prepared according to the method reaches up to 12 percent above, and the purity of the tea polyphenol is over 98 percent; and the method is practical and simple, the technological process is short, and the production efficiency is high.

Description

1. Technical field [0001] The invention relates to a method for extracting and separating tea polyphenols from tea leaves. It belongs to biological extraction technology. 2. Technical Background [0002] Tea polyphenols, also known as tea tanning or tea tannin, is the general term for polyphenols in tea, including flavanols, anthocyanins, flavonoids, flavonols and phenolic acids. Among them, flavanols are the most important. 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. Among them, catechins are the most important, accounting for about 60%-80% of the total polyphenols; catechins are mainly composed of EGC, DLC, EC, EGCG, GCG, ECG and other monomers such as tea polyphenols and other active The substance has detoxification and anti-radiation effects, and is known as the "radiation nemesis" by the health and medical circles; its main functions include anti-f...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07G99/00
Inventor 王喜军李海军郭崴
Owner 西安正东生物科技有限公司