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Industrialized production method of high content tea polyphenol

A production method and technology for tea polyphenols are applied in the industrial production field of high-content tea polyphenols, can solve the problems of long process route, unsafe, difficult industrialized production and the like, and achieve high product safety, low production cost, and pesticide residues. low effect

Active Publication Date: 2015-01-07
CHENGUANG BIOTECH GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In the patent application number 200610055145.7, a method for extracting tea polyphenols, theanine, tea polysaccharides, and tea pigments from tea leaves is disclosed, in which it is mentioned that the use of carbon dioxide supercritical fluid decaffeine, pesticide residues, and solvents, but the The process uses a variety of organic solvents, which reduces the safety of tea polyphenol products. At the same time, due to the long process route and high operating pressure of supercritical equipment, it not only increases the production cost, but also causes unsafe factors in the production process. It is not easy for industrial production, and water is used as entrainer in the process, which reduces the yield of tea polyphenols

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Embodiment 1: The industrial production method of this high-content tea polyphenol adopts the following process steps.

[0021] (1) Take 100kg of tea raw materials with a polyphenol content of 13.61wt%, and grind them (the crushing degree is more than 90wt% and passed through a 20-mesh sieve, and less than 10wt% is passed through a 80-mesh sieve); Next, continuous countercurrent extraction was carried out in a towline extractor with ionized water added with 2% VC (vitamin C) by weight of tea leaves, and the extraction time was 3 hours.

[0022] (2) After cooling the extract solution through a heat exchanger, add perlite equivalent to 1% of the extract solution weight, stir well, and filter with a plate filter press for clarification.

[0023] (3) The filtrate is adsorbed by AB-8 resin, and then firstly use 1BV, pH3.8 acetic acid solution, and then use 1.5BV, 5wt% ethanol solution to elute impurities; use 2BV, 52wt% ethanol solution to analyze to obtain tea polyphenols ...

Embodiment 2

[0028] Embodiment 2: The industrial production method of this high-content tea polyphenol adopts the following process steps.

[0029] (1) Take 100kg of tea raw materials with a polyphenol content of 22.78wt%, and grind them (the crushing degree is more than 90wt% and passed through a 20-mesh sieve, and less than 10wt% is passed through a 80-mesh sieve); Next, use tap water to carry out continuous countercurrent extraction in a towline extractor, and the extraction time is 3.5h.

[0030] (2) After cooling the extract solution through a heat exchanger, add diatomaceous earth equivalent to 2.5% of the extract solution weight, stir evenly, and filter with a plate filter press for clarification.

[0031] (3) The filtrate is adsorbed by D101 resin, and then the impurities are eluted with 1.5BV, pH4.9 phosphoric acid solution, and then 2BV, 7wt% ethanol solution; the tea polyphenols are analyzed with 2.5BV, 48wt% ethanol solution liquid.

[0032] (4) Recover the solvent from the a...

Embodiment 3

[0036] Embodiment 3: The industrial production method of this high-content tea polyphenol adopts the following process steps.

[0037] (1) Take 100kg of tea raw materials with a polyphenol content of 18.72wt%, and grind them (the crushing degree is more than 90wt% and passed through a 20-mesh sieve, and less than 10wt% is passed through a 80-mesh sieve); Next, continuous countercurrent extraction was carried out in a horizontal rotary extractor with an acetic acid solution added with 1.5% VC by weight of tea leaves and pH 3.9, and the extraction time was 4 hours.

[0038] (2) After cooling the extract solution through a heat exchanger, add diatomaceous earth equivalent to 2% of the extract solution weight, stir evenly, and filter and clarify with a plate filter press.

[0039](3) The filtrate is adsorbed by XAD-7HP resin, and then firstly use 2BV, pH5.0 citric acid solution, and then use 3BV, 10wt% ethanol solution to elute impurities; use 3BV, 66wt% ethanol solution to analyz...

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PUM

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Abstract

The invention discloses an industrialized production method of high content tea polyphenol. The method comprises the following technological steps: 1, crushing tea leaves, and carrying out continuous countercurrent extraction with water or acid water to obtain an extract solution, wherein extraction conditions comprise that the material to liquid ratio is 1:16-20, the extraction temperature is 67-82DEG C and the extraction time is 2-4h; 2, cooling and filtering the extraction solution to obtain a clarified filtrate; 3, adsorbing the filtrate with a resin, eluting with acid water having a pH value being 3-5 and a flow rate being 1-2BV and a low alcohol having a flow rate being1-3BV to remove impurities, and desorbing with a high alcohol having a flow rate being 1-3BV to obtain a tea polyphenol desorption solution; 4, recovering the solvent from the tea polyphenol desorption solution, and removing solvent residues to obtain a tea polyphenol concentrate; 5, carrying out supercritical carbon dioxide extraction on the tea polyphenol concentrate to remove pesticide residues; and 6, carrying out spray drying on the pesticide residue removed tea polyphenol concentrate to obtain tea polyphenol products. The method has the characteristics of environmental protection, simple technology, low pesticide residue, and high safety.

Description

technical field [0001] The invention relates to an industrial method for purifying natural extracts, in particular to an industrial production method for high-content tea polyphenols. Background technique [0002] Tea Polyphenols is the general term for polyphenols in tea, including flavanols, anthocyanins, flavonoids, flavonols and phenolic acids. It has anti-oxidation, scavenging free radicals in the body, anti-aging, anti-radiation, weight loss, lowering blood fat, anti-cancer and other effects. It is a kind of human immune enhancer with definite effect. [0003] Tea polyphenols are light yellow to brownish yellow powder or crystals, bitter in taste, easily soluble in warm water, ethanol, methanol, acetone, acetic acid and ethyl acetate, slightly soluble in oil, insoluble in organic solvents such as chloroform and benzene; hygroscopic Good thermal stability. It is stable in the range of pH=2-7. When pH<2, catechin self-polymerizes under the catalysis of strong acid ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07G99/00
CPCY02P20/54
Inventor 田洪连运河程远欣陈丽孙国峰
Owner CHENGUANG BIOTECH GRP CO LTD