Technology for preparing high content tea polyphenol using water as single solvent

A technology with high content of tea polyphenols, applied in tea extraction, etc., can solve the problems of low work efficiency, difficulty in removing organic solvents, low transfer rate of tea polyphenols, etc., and achieve the effect of short process route, light color and high content

Inactive Publication Date: 2011-06-01
广州泽力医药科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Both the organic solvent extraction method and the metal ion precipitation method need to use organic solvents or inorganic salts other than water, such as chloroform, ethyl acetate, calcium hydroxide, etc., an...

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Mainly explain the preparation process of tea polyphenol extract from dried green tea powder.

[0038] Main equipment: vortex universal pulverizer, stirring and mixing tank, continuous extraction and separation concentrator, refrigeration tank.

[0039] Raw materials: 20kg of minced Yunnan big-leaf green tea, with a tea polyphenol content of 15.2%.

[0040] Process and key technical parameters:

[0041] 1. Pulverization: Use a 1.0mm pre-installed vortex universal pulverizer to pulverize the green tea;

[0042] 2. Mixing and pulping: put the pulverized green tea powder and 900kg of purified water in the mixing tank, and stir for 5 minutes to make the mixture even;

[0043] 3. Extraction, separation and concentration: pump the mixed slurry to the extraction buffer tank of the continuous extraction and separation concentrator, operate according to the standard operating procedure of the continuous extraction and separation concentrator, the extraction pressure is 45MP...

Embodiment 2

[0046] The preparation process of powdered tea polyphenols with dried green tea as raw material is mainly described.

[0047] Spread the tea polyphenols extract prepared in Example 1 thinly in a stainless steel tray with a layer thickness of 3-5mm, place it in a vacuum desiccator, control the vacuum degree to 0.09MPa, and the temperature of the drying chamber at 65°C, vacuum-dry, pulverize, and prepare The powdered tea polyphenols were obtained, the water content was 3.2%, the content of tea polyphenols was 92.6%, and the content of catechins was 61.3%.

Embodiment 3

[0049] Mainly explain the preparation process of powdered tea polyphenols from fresh green tea.

[0050] Main equipment: vortex type universal pulverizer, stirring mixing tank, continuous extraction and separation concentrator, refrigeration tank, 200nm ceramic membrane microfilter, spray dryer.

[0051] Raw materials: 100kg of fresh green tea from Yunnan big leaf species, the content of tea polyphenols is 4.6%.

[0052] Process and key technical parameters:

[0053] 1. Crush: Grind fresh green tea green tea with a pre-installed 1.2mm vortex universal grinder, add low-temperature purified water at 0°C to 5°C while crushing, and control the temperature of the feed liquid to not exceed 15°C;

[0054] 2. Mixing and pulping: put the crushed green tea pulp and 600kg of purified water in a mixing tank, stir to make the mixture even and control the temperature of the feed liquid to not exceed 15°C;

[0055] 3. Extraction, separation and concentration: pump the mixed slurry to t...

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PUM

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Abstract

The invention relates to a technology for preparing high content tea polyphenols using water as a single solvent, especially to a technological combination which uses tea as raw materials and water as the single solvent, and comprises steps of: performing extraction, separation and condensation at a low temperature; performing refrigeration and deposition to prepare liquid tea polyphenols; furtherly drying and preparing solid tea polyphenols. The preparative solid tea polyphenols in powder form of the present invention have a tea polyphenol content greater than 90% and a catechin content greater than 60%; and the prepared liquid tea polyphenol extracts have a tea polyphenol content greater than 40% and a catechin content greater than 25%. The invention has a short technological process and all operations before drying can be performed at low temperatures; low concentrated solution viscosity is in favor of precipitation and deposition of tea polyphenols; the prepared products keep no organic solvent residuals and have shallow colors and a high content of tea polyphenol.

Description

technical field [0001] The invention relates to a preparation process of high-content tea polyphenols, in particular to a process for preparing liquid tea polyphenols by using tea leaves as raw materials and using only water as a single solvent through low-temperature extraction, separation and concentration, refrigerated precipitation, and further drying to prepare solid tea polyphenols. The combination of processes, the prepared solid powder tea polyphenols contain more than 90% tea polyphenols and 60% catechins, and the prepared liquid tea polyphenols extracts contain more than 40% tea polyphenols and catechins Greater than 25%. Background technique [0002] In the world, tea (Camellia sinensis), as a traditional fast-consumption drink with health care function, has been paid more and more attention and love by people. Tea contains complex chemical components, among which the most important is tea polyphenols. [0003] Tea polyphenols are a kind of phenolic active ingre...

Claims

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Application Information

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IPC IPC(8): A23F3/18
Inventor 宋力飞刘乡乡李曼莎
Owner 广州泽力医药科技有限公司
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