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Method for extracting high-content tea polyphenol from fresh tea

A fresh tea, high-content technology, used in chemical instruments and methods, medical preparations containing active ingredients, measuring devices, etc. Expensive and other problems, to achieve the effect of light appearance, low cost and short production cycle

Active Publication Date: 2014-05-28
CHENGDU WAGOTT BIO TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The production cost of this method is high, and it is easy to cause pollution
[0005] 2. The ion precipitation method uses metals to precipitate tea polyphenols to separate them from caffeine. This method uses heavy metals that are toxic to the human body as a precipitant. Therefore, the products produced by this method are difficult to meet the requirements of the food and pharmaceutical industries.
Studies have shown that the yield of tea polyphenols is between 4% and 8% and the purity can reach 98% by using the column separation preparation method, but the column packing material is very expensive, and various and large amounts of organic solvents are used for rinsing. Not suitable for industrial production

Method used

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  • Method for extracting high-content tea polyphenol from fresh tea

Examples

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Comparison scheme
Effect test

Embodiment 1

[0027] Embodiment 1: a kind of method extracting high-content tea polyphenols from fresh tealeaves, it comprises the following steps:

[0028] S1. Lixiviation: 2000kg of fresh tea leaves are placed in an extractor, 16000kg of ethyl acetate is added to soak at a constant temperature for 3 hours, and the mixed solution in the extractor is passed through a 18-mesh sieve to obtain a filtrate; wherein, the constant temperature soaking temperature is 50 ℃;

[0029] S2. Primary evaporation and concentration: heat the filtrate to 70°C, evaporate and concentrate to a solid content of 35%, and obtain a solid-liquid mixture, that is, a primary evaporation concentrate;

[0030] S3. Water sinking: add the primary evaporation concentrated liquid into purified water, and discard the solid after water sinking, and the solid content of the obtained liquid reaches 4%; wherein, the weight ratio of the primary evaporation concentrated liquid and purified water is 1:4;

[0031] S4. CF filtration:...

Embodiment 2

[0035] Embodiment 2: a kind of method extracting high-content tea polyphenols from fresh tealeaves, it comprises the following steps:

[0036] S1. Leaching: 2000kg of fresh tea leaves are placed in an extractor, 20000kg of ethyl acetate is added to soak at a constant temperature for 4 hours, and the mixed solution in the extractor is passed through a 24-mesh sieve to obtain a filtrate; wherein, the constant-temperature soaking temperature is 60 ℃;

[0037] S2. Primary evaporation and concentration: heat the filtrate to 75°C, evaporate and concentrate to a solid content of 45%, and obtain a solid-liquid mixture, that is, a primary evaporation concentrate;

[0038] S3. Water sinking: add the primary evaporation concentrate to purified water, and discard the solid after water sinking. The solid content of the obtained liquid reaches 6%; wherein, the weight ratio of the primary evaporation concentrate to purified water is 1:8;

[0039] S4. CF filtration: Use CF filter to filter t...

Embodiment 3

[0043] Embodiment 3: a kind of method extracting high-content tea polyphenols from fresh tealeaves, it comprises the following steps:

[0044] S1. Leaching: 2000kg of fresh tea leaves are placed in the extractor, 18000kg of ethyl acetate is added to soak at a constant temperature for 3.5h, and the mixed solution in the extractor is passed through a 20-mesh sieve to obtain a filtrate; wherein, the constant-temperature soaking temperature is 52°C;

[0045] S2. Primary evaporation and concentration: heat the filtrate to 73°C, evaporate and concentrate to a solid content of 40%, and obtain a solid-liquid mixture, that is, a primary evaporation concentrate;

[0046] S3. Water sinking: adding the primary evaporation concentrate to purified water, and discarding the solid after water sinking, the obtained liquid has a solid content of 5%; wherein, the weight ratio of the primary evaporation concentrate to purified water is 1:6;

[0047] S4. CF filtration: Use CF filter to filter the...

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Abstract

The invention discloses a method for extracting high-content tea polyphenol from fresh tea, belonging to the technical field of chemistry of natural products. The method comprises the following concrete steps: S1, extraction; S2, primary evaporative concentration; S3, water precipitation; S4, CF filtration; S5, evaporative concentration; S6, spray drying; and S7, deironing. According to the invention, fresh tea is used as a raw material, and the disadvantages of easy pasting and uneasy filtration during extraction of crushed and sieved dry tea at a high temperature in the prior art is overcome; ethyl acetate is used as a medium for direct separation of high-content tea polyphenol, and leaching of a plurality of water-soluble pesticides is reduced; the high-content tea polyphenol product prepared by using the method has tea polyphenol content of as high as 84.2% and caffeine content of 9.6%, and the product has a slightly bright color and high solution clarity. The method has the advantages of simple operation, high separation efficiency, low cost, a short production period and high product purity and is suitable for industrialized large-scale production.

Description

technical field [0001] The invention belongs to the technical field of natural product chemistry, and in particular relates to a method for extracting high-content tea polyphenols from fresh tea leaves. Background technique [0002] Tea polyphenols (TP) is a new type of natural antioxidant extracted from tea, which has a series of important pharmacological functions such as anti-cancer, anti-aging, anti-radiation, scavenging free radicals in the human body, and lowering blood sugar and blood lipids. It has broad application prospects in oil, food, medicine, daily chemical and other fields. Tea polyphenols are a mixture of various catechin monomers, among which the active ingredient that is highly anti-oxidant, anti-cancer and scavenging free radicals in the body is epigallocatechin gallate (EGCG), which is recognized worldwide as It is "the most ideal anticancer drug extracted from natural plants after paclitaxel". In October 2006, the U.S. Food and Drug Administration (FD...

Claims

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Application Information

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IPC IPC(8): C07C37/68G01N30/06G01N30/02
CPCA61K36/82A61K2236/35A61K2236/51A61K2236/55
Inventor 顾峰
Owner CHENGDU WAGOTT BIO TECH
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