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High, medium and low-poly theabrownin and preparation method thereof

A technology of theabrownin and high polymerization, applied in the food field, can solve the problems of not preparing theabrownin with different degrees of polymerization and the like

Inactive Publication Date: 2014-01-15
TIANJIN TASLY GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] There are reports on the preparation of theabrownin in the prior art, but there is no report on the method of preparing theabrownin with different degrees of polymerization. After research, the present invention finds a method for preparing theabrownins with different degrees of polymerization. The method is simple and easy. Yes, theabrownin with different degrees of polymerization can be prepared at the same time

Method used

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  • High, medium and low-poly theabrownin and preparation method thereof
  • High, medium and low-poly theabrownin and preparation method thereof
  • High, medium and low-poly theabrownin and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Take an appropriate amount of Pu’er ripe tea, add 10 times the amount of water and heat at 80°C to extract twice, 1 hour each time, filter, add 8 times the amount of water to the tea residue, heat at 80°C for 0.5 hour, filter, discard the tea residue, and combine the extracts , pass through a 300-mesh filter cloth, concentrate the filtrate under reduced pressure at 70°C to a relative density of 1.05-1.10, and centrifuge in a tube to obtain the centrifuged supernatant, add 95% ethanol to sink to an alcohol content of 80%, let it stand overnight at room temperature, and centrifuge , to obtain alcohol precipitation, heating water to redissolve to a specific gravity of 1.05-1.10, tube centrifugation to obtain a supernatant, and spray drying to obtain dry powder A. The dry powder A in the above flow chart is theabrownin dry powder.

[0037] Preparation process of theabrownin with different degrees of polymerization

[0038] Take theabrownin dry powder and redissolve in water...

Embodiment 2

[0040] Take an appropriate amount of Pu’er ripe tea, add 5 times the amount of water and heat at 90°C to extract once for 2 hours, the extract is passed through a 300-mesh filter cloth, the filtrate is concentrated under reduced pressure at 70°C to a relative density of 1.05-1.10, and centrifuged in a tube to obtain the centrifuge. Add 90% ethanol to ethanol to settle to 70% alcohol content, cool and stand for 12 hours, centrifuge to obtain alcohol precipitate, heat water to redissolve to specific gravity 1.05-1.10, tube centrifuge to obtain supernatant, spray dry , to obtain dry powder A, dry powder A in the above flow chart is theabrownin dry powder.

[0041] Preparation process of theabrownin with different degrees of polymerization

[0042] Take theabrownin dry powder and redissolve in water (2.5g → 5L), pass through 0.45μm and 0.22μm microporous membranes successively, and filter the filtrate with a nanofiltration membrane with a cut-off molecular weight of 50,000, and de...

Embodiment 3

[0044]Take an appropriate amount of Pu’er cooked tea, add 20 times the amount of water, heat at 100°C and extract 3 times, each time for 0.5 hours, filter, combine the extracts, pass through a 300-mesh filter cloth, and concentrate the filtrate under reduced pressure at 70°C to a relative density of 1.05-1.10. centrifuge to obtain the centrifuged supernatant, add 100% ethanol to ethanol to precipitate to alcohol content of 75%, let it stand at room temperature for 24 hours, centrifuge to obtain ethanol precipitation, heat water to redissolve to a specific gravity of 1.05-1.10, and tube centrifuge to obtain The supernatant was spray-dried to obtain dry powder A, and the dry powder A in the above flow chart was theabrownin dry powder.

[0045] Preparation process of theabrownin with different degrees of polymerization

[0046] Take the theabrownin dry powder and redissolve it in water (10g → 5L), pass through 0.45μm and 0.22μm microporous membranes in sequence, and filter the fi...

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Abstract

The invention provides a preparation method of high, medium and low-poly theabrownin. The method comprises the following steps: 1, extracting Pu'er tea by water to obtain an extracting solution, and centrifuging the extracting solution to obtain supernate after concentrating; 2, adding ethanol to the supernate to obtain sediments, adding water to dissolve the sediments, centrifuging to obtain centrifugate, and drying to obtain dry theabrownin powder; 3, dissolving the dry theabrownin powder by water, and obtaining different polymerization degrees of theabrownin by using a filter membrane filtering method.

Description

technical field [0001] The invention relates to the field of food, in particular to a high, medium and low polytheabrownin and a preparation method thereof. Background technique [0002] During the fermentation process of Pu'er tea, the substances in Pu'er tea have undergone great changes, especially the pigment substances. Theabrownin is the main component of Pu-erh tea, and it is also an important component that distinguishes Pu-erh tea from other tea beverages, and has received great attention. Theabrownin has a complex structure and great polarity, and is insoluble in most organic reagents. There are few studies on theabrownin. [0003] At present, most of the research reports on theabrownin use organic solvent extraction. Pu’er tea is ground first, then extracted with water, extracted with chloroform or dichloromethane to remove caffeine, and then ethyl acetate and n-butanol are used to remove theaflavins and thearubigins to obtain theabrownin. The process is roughly...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A23F3/18
Inventor 李瑞明王玉张兰兰顾睿李长文刘顺航贾黎晖陈庆闯
Owner TIANJIN TASLY GROUP
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