Process technique for extracting tea polyphenol from tree plant flower

A processing technology and technology of tea tree flowers, which are applied in the preparation of organic compounds, chemical instruments and methods, organic chemistry, etc., can solve the problems of low purity of tea polyphenols, single separated components, and difficulty in expanding the scale. The effect of richness, high physical and chemical stability, and high operating cost

Inactive Publication Date: 2008-01-23
YANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The solvent extraction method uses chloroform to extract the filtrate to remove pigment and caffeine; the precipitation method uses heavy metal ions to precipitate tea polyphenols in the filtrate to separate them from pigments and caffeine. These two methods may cause organic solvents or Heavy metal residues, and the purity of the prepared tea polyphenols is not high
The method of separating and extracting catechins from crude tea polyphenols has supercritical

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Fresh tea tree flowers harvested on site are dried in low-temperature vacuum to obtain dry tea tree flowers, which reduces the oxidation loss of polyphenols during preservation. The tea tree flower grinder is crushed to about 50 meshes, 3kg of crushed tea tree flowers are mixed with 60 L of 60% ethanol, after cold soaking for 8 hours, put into a temperature-controlled ultrasonic extraction equipment, heated to 55°C, ultrasonically extracted for 20 minutes, and filtered; the second time Add 30 L of 60% ethanol for extraction, heat to 55°C, ultrasonically extract for 5 minutes, and filter. The two filtrates were combined. The filtrate is concentrated in vacuum to recover ethanol, the volume fraction of ethanol in the extract is reduced, and water is added to make up to 100L. Microfiltration clarifies the tea tree flower extract, removes a large amount of tea tree flower fine particles and suspended impurities in the material liquid, and reduces the pollution to the subse...

Embodiment 2

[0027] Fresh tea tree flowers harvested on site are dried in low-temperature vacuum to obtain dry tea tree flowers, which reduces the oxidation loss of polyphenols during preservation. The tea tree flower grinder is crushed to about 50 meshes, 3 kg of crushed tea tree flowers are mixed with 70 L of 60% ethanol, after cold soaking for 4 hours, put into a temperature-controlled ultrasonic extraction equipment, heated to 60 ° C, ultrasonically extracted for 30 minutes, and filtered; the second For the second extraction, add 30 L of 60% ethanol, heat to 60°C, ultrasonically extract for 5 minutes, and filter. The two filtrates were combined. The filtrate is concentrated in vacuum to recover ethanol, the volume fraction of ethanol in the extract is reduced, and water is added to make up to 100L. Microfiltration clarifies the tea tree flower extract, removes a large amount of tea tree flower fine particles and suspended impurities in the material liquid, and reduces the pollution to...

Embodiment 3

[0033] Fresh tea tree flowers harvested on site are dried in low-temperature vacuum to obtain dry tea tree flowers, which reduces the oxidation loss of polyphenols during preservation. The tea tree flower grinder is crushed to about 50 meshes, 3kg of crushed tea tree flowers are mixed with 75L of 60% ethanol, after cold soaking for 9 hours, put into a temperature-controlled ultrasonic extraction equipment, heated to 50°C, ultrasonically extracted for 25 minutes, and filtered; the second extraction Add 30 L of 60% ethanol, heat to 50°C, ultrasonically extract for 5min, and filter. The two filtrates were combined. The filtrate is concentrated in vacuum to recover ethanol, the volume fraction of ethanol in the extract is reduced, and water is added to make up to 100L. Microfiltration clarifies the tea tree flower extract, removes a large amount of tea tree flower fine particles and suspended impurities in the material liquid, and reduces the pollution to the subsequent ultrafilt...

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Abstract

A process technology extracting the tea polyphenols from the tea plant flowers is provided, which relates to the preparation technology of the separation and purification of the tea polyphenols. The process technology comprises the following steps: 1) drying the tea tree pollen; 2) producing the extracting solution by ultrasonic wave; 3) producing ultrafiltration treatment filter liquor after extraction, condensation, microfiltration and ultrafiltration; 4) gaining polyphenols extracting solution through absorption by medium polarity adsorbent resins; 5) producing the extracting solution to the extract and producing the extract to the polyphenol fine powder of the tea plant flowers. Compared with the method using the current tea to prepare tea polyphenols, the invention has the following advantages that aiming at the characteristics of abundant content of the polyphenols of the tea plant flowers, little pigment impurity and good stability, the invention carries out the comprehensive development and use to change waste into valuable, replaces the tea leaves to extract the natural tea polyphenols and provides raw materials and additives with high quality for the industries such as medicine, food and cosmetic. The invention improves the utilization rate of the tea plant flowers resources and is suitable for the scale production, reduces the energy consumption and production cost and enhances the competitiveness of the production.

Description

technical field [0001] The invention relates to a preparation process for the separation and purification of tea tree flowers and tea polyphenols, which belongs to the field of natural organic chemistry and the field of deep processing of agricultural products, and in particular to a preparation process for the separation and purification of target components by the combination of ultrasonic wave-ultrafiltration-macroporous adsorption resin . Background technique [0002] Tea tree flowers contain a variety of natural components similar to fresh tea leaves, such as tea polyphenols, proteins, polysaccharides, etc. Among them, tea polyphenols, mainly catechins, have the functions of eliminating free radicals in the human body and improving immunity, anti-oxidation and anti-aging , anti-radiation, lowering blood fat, weight loss and other effects, has been widely used in medicine, health care products, cosmetics and food industries, is a safe and natural active substance, the ap...

Claims

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Application Information

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IPC IPC(8): C07D311/74C07C39/10C07C37/70
Inventor 黄阿根董瑞建刘国艳
Owner YANGZHOU UNIV
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