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A simple and efficient method for two-liquid phase extraction, separation and purification and preparation of high-purity tea polyphenols

A separation and purification, dual-phase technology, applied in the field of extraction and purification of natural substances, can solve the problems of low extraction rate of tea polyphenols, expensive consumables, complicated operation, etc. simple effect

Active Publication Date: 2021-04-30
SOUTH CHINA NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Liquid-liquid extraction, adsorption separation, and column chromatography all have problems such as low extraction rate of tea polyphenols, complicated operation, and expensive consumables.

Method used

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  • A simple and efficient method for two-liquid phase extraction, separation and purification and preparation of high-purity tea polyphenols
  • A simple and efficient method for two-liquid phase extraction, separation and purification and preparation of high-purity tea polyphenols
  • A simple and efficient method for two-liquid phase extraction, separation and purification and preparation of high-purity tea polyphenols

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] (1) preparing tea raw materials through pretreatment;

[0053] Pretreatment of tea raw materials: washing the tea raw materials to remove visible impurities such as dust, dead branches, stones, etc., and drying the tea raw materials to a state that can be crushed. The tea raw material is placed in a pulverizer for pulverization. It should be noted that the rotational speed and pulverization time of the pulverizer should be controlled to prevent the working temperature of the pulverizer from being too high so that the active substances of the tea raw material are destroyed or escaped. Sieve and analyze the tea raw materials that have been pulverized.

[0054]Preferably, the pulverized tea raw material is sieved by using a sieve of 40 mesh or above. Only in this example, 40 mesh sieves are selected for the sieve analysis. In other possible implementations, those skilled in the art can adjust the mesh size of the sieve used within the scope of the technical solution of t...

Embodiment 2

[0074] (1) prepare tea raw material through pretreatment;

[0075] Pretreatment of tea raw materials: washing the tea raw materials to remove visible impurities such as dust, dead branches, stones, etc., and drying the tea raw materials to a state that can be crushed. The tea raw material is placed in a pulverizer for pulverization. It should be noted that the rotational speed and pulverization time of the pulverizer should be controlled to prevent the working temperature of the pulverizer from being too high so that the active substances of the tea raw material are destroyed or escaped. Sieve and analyze the tea raw materials that have been pulverized.

[0076] Preferably, the pulverized tea raw material is sieved by using a sieve of 40 mesh or above. Only in this embodiment, 50 mesh sieves are selected for the sieve analysis. In other possible implementations, those skilled in the art can adjust the mesh size of the sieve used within the scope of the technical solution of ...

Embodiment 3

[0096] (1) Prepare pre-treated tea raw materials

[0097] Pretreatment of tea raw materials: washing the tea raw materials to remove visible impurities such as dust, dead branches, stones, etc., and drying the tea raw materials to a state that can be crushed. The tea raw material is placed in a pulverizer for pulverization. It should be noted that the rotational speed and pulverization time of the pulverizer should be controlled to prevent the working temperature of the pulverizer from being too high so that the active substances of the tea raw material are destroyed or escaped. Sieve and analyze the tea raw materials that have been pulverized.

[0098] Preferably, the pulverized tea raw material is sieved by using a sieve of 40 mesh or above. Only in this example, 40 mesh sieves are selected for the sieve analysis. In other possible implementations, those skilled in the art can adjust the mesh size of the sieve used within the scope of the technical solution of the present ...

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Abstract

The invention provides a simple and efficient method for two-liquid phase extraction, separation and purification, and preparation of high-purity tea polyphenols, which at least includes the steps of: preparing tea raw materials; tea raw materials, water phase, and organic phase in a mass-volume ratio of 1g:5~ 20mL: Mix 5-20mL; mix the tea raw materials with the water phase evenly, and keep the water phase and the organic phase separated; separate the organic phase after extraction, and use it as the crude extract; mix the crude extract with the water phase and the adsorbent according to the mass volume Mix 10mL: 10mL: 0.5~2g; mix the adsorbent with the water phase evenly, and keep the water phase and the organic phase separated; separate the organic phase again to obtain a refined extract. The invention selectively extracts tea polyphenols through a two-liquid phase system, and combines with a pretreatment adsorbent to reduce the extraction of impurities and improve the purity of finished products. At the same time, no toxic and harmful substances are introduced, which increases the safety of finished products. The reagent used in the invention is easy to obtain, can be recycled and re-entered into the process, has high utilization rate, and effectively reduces cost.

Description

technical field [0001] The invention relates to the field of extraction and purification of natural substances, in particular to a method for the extraction, separation, purification and preparation of high-purity tea polyphenols. Background technique [0002] Tea polyphenols have various pharmacological functions and health effects, and are widely used in industries such as medicine, food, health care products and cosmetics. my country has abundant tea resources, and a large number of tea raw materials can be used to extract and prepare tea polyphenols. In recent years, my country's tea industry has overcapacity, and there are a large number of discarded summer and autumn teas and unsalable teas. At the same time, a large amount of waste tea is also produced in the process of tea garden pruning and tea processing. According to statistics, my country's tea industry has about 1 million tons of waste tea every year. Abandoned tea leaves, sub-waste tea leaves and commercial t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07D311/62C07G99/00A61K36/82
CPCA61K36/82C07D311/62C07G99/00
Inventor 李海航林丽倪贺
Owner SOUTH CHINA NORMAL UNIVERSITY
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