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Method for extracting natural tea polyphenol

A tea polyphenol and natural technology, applied in the field of tea polyphenol extraction, can solve the problems of porogen synthesis raw materials and solvent residues and high cost, and achieve the effects of low caffeine content, low usage amount and low preparation cost

Inactive Publication Date: 2010-08-18
晋江市恒源科技开发有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, macroporous adsorption resins still have problems such as high cost in industrial applications, synthetic raw materials such as porogens, and solvent residues.

Method used

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  • Method for extracting natural tea polyphenol
  • Method for extracting natural tea polyphenol
  • Method for extracting natural tea polyphenol

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Use commercially available FAU zeolite powder with a silicon-aluminum ratio of 72, process it into strips (diameter 2.5mm), cut into short strips of 3-5mm after high-temperature roasting, activate in air at 550°C for 4 hours and cool, then place in After deionized water is properly heated to fully remove air bubbles, add it to the adsorption column. The adsorption column has a height of 45cm, an inner diameter of 3cm, and a zeolite adsorbent loading capacity of 120g.

[0026] Weigh 5 grams of instant tea powder, prepare 0.01 g / mL tea, and filter to remove insoluble impurities. Adjust the flow rate to be stable at 5.5mL / min, pump 500mL tea water solution containing tea polyphenols to the adsorption column with a constant flow pump, and immediately pump 20-500mL deionized water after the tea water solution is exhausted. Then eluted with 200-2000ml of 7% ethanol solution, collected the ethanol eluate, concentrated by ultrafiltration, added a small amount of absolute ethan...

Embodiment 2

[0028] Use commercially available FAU zeolite powder with a silicon-aluminum ratio of 60, process it into strips (diameter 2.5mm), cut into short strips of 3-5mm after high-temperature roasting, activate in air at 500°C for 4 hours and cool, then place in After deionized water is properly heated to fully remove air bubbles, add it to the adsorption column. The adsorption column has a height of 45cm, an inner diameter of 3cm, and a zeolite adsorbent loading capacity of 125g.

[0029] Weigh 10 grams of instant tea powder, prepare 0.01 g / mL tea, and filter to remove insoluble impurities. Adjust the flow rate to be stable at 8mL / min, pump 1L tea solution containing tea polyphenols to the adsorption column with a constant flow pump, and immediately pump 30-1000mL deionized water after the tea solution is exhausted. Then eluted with 200-2000mL 20% ethanol solution, collected the ethanol eluate, concentrated by ultrafiltration, added a small amount of absolute ethanol and rotary eva...

Embodiment 3

[0031] Use commercially available FAU zeolite powder with a silicon-aluminum ratio of 15, process it into small balls with a particle size of 1.5-2mm, roast at 600°C for 3.5 hours, and perform hydrophobization treatment at 120°C for 2 hours. Place in deionized water, heat properly to fully remove air bubbles, and then add to the adsorption column. The adsorption column has a height of 45cm, an inner diameter of 3cm, and a loading capacity of 126g of zeolite adsorbent.

[0032] Weigh 5 grams of instant tea powder, prepare 0.01 g / mL tea, and filter to remove insoluble impurities. Adjust the flow rate to be stable at 10mL / min, pump 500mL of tea water solution containing tea polyphenols to the adsorption column with a constant flow pump, and the adsorption column is kept at a temperature of 50°C through circulating water. After the tea solution is exhausted, immediately pump 20-200mL of deionized water. Subsequently, it was eluted with 200-2000 mL of 10% ethanol solution, and th...

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Abstract

The invention belongs to the technical field of tea deep processing, in particular to a method for extracting natural tea polyphenol. The method comprises the following steps: enabling water solution containing the tea polyphenol to flow through an adsorption column for filling an inorganic zeolite molecular sieve at the temperature of 0-75DEG C; eluting with deionized water and 5-50 percent water solution of ethanol; collecting eluent of the water solution of ethanol; and ultrafiltering and drying to obtain a tea polyphenol product the purity of which is high than 95 percent and the content of caffeine is lower than 1.0 percent. The method has the advantages of safe, simple and convenient operation flow and low energy consumption; the obtained tea polyphenol has high purity, low content of caffeine and less consumption of organic solvent; and the used adsorbent can be repeatedly used. The invention is applicable for separating and extracting the tea polyphenol from tea water leaching liquid, particularly applicable for treating low-grade tea to improve the added value or is used for leftovers and waste liquor containing the tea polyphenol in the deep processing of the tea.

Description

technical field [0001] The invention belongs to the technical field of tea deep processing, and in particular relates to a method for extracting tea polyphenols from tea extracts, tea processing leftovers and waste liquids. Background technique [0002] Tea contains biologically active ingredients such as tea polyphenols and theanine. Tea polyphenols, also known as tea tannins and tea tannins, are the general term for polyphenols in tea, and contain more than 30 kinds of phenolic substances. Its main component is catechin, accounting for about 80% of its total amount. Tea polyphenols have various functions such as antibacterial, bactericidal, anti-tumor, and anti-radiation. They have great potential in the prevention and treatment of the world's three major human frequently-occurring diseases-dental caries, cardiovascular diseases, and cancer. They are used as antioxidants and food additives in food. industry is widely used. [0003] Tea polyphenols account for about 20-2...

Claims

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Application Information

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IPC IPC(8): A61K36/82A61P31/04A61P35/00A61P17/16A61P39/06A23L1/29A61K127/00A23L33/00
Inventor 林德昌龙英才董俊萍林金建
Owner 晋江市恒源科技开发有限公司
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