Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Method for preparing theabrownin

A technology of theabrownin and water layer, applied in the field of preparing theabrownin, can solve the problems of consuming Pu'er tea and the like

Inactive Publication Date: 2013-09-18
TIANJIN TASLY GROUP
View PDF5 Cites 7 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] After research, the present invention finds a method for preparing theabrownin analogues using gallic acid as a raw material, which avoids the problem of obtaining theabrownin from Puer tea and consuming a large amount of Puer tea

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for preparing theabrownin
  • Method for preparing theabrownin
  • Method for preparing theabrownin

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0070] Accurately weigh 422mg of gallic acid, place it in a 250ml round bottom flask, add 100ml of water and 0.5ml of ammonia water, stir at room temperature for 48h, and obtain a crude theabrownin solution. The solution was transferred to a 250ml separatory funnel, extracted twice with ethyl acetate, the water phase was extracted twice with an equal volume of n-butanol, and the water phase was dried under reduced pressure to obtain 402 mg of homemade theabrownin.

Embodiment 2

[0072] Accurately weigh 200 mg of gallic acid, place it in a 250 ml round bottom flask, add 40 ml of water and 0.3 ml of ammonia water, stir at room temperature for 24 hours, and obtain a crude theabrownin solution. The solution was transferred to a 250ml separatory funnel, extracted once with ethyl acetate, the water phase was extracted once with an equal volume of n-butanol, and the water phase was dried under reduced pressure to obtain 200 mg of homemade theabrownin.

Embodiment 3

[0074] Accurately weigh 600mg of gallic acid, place it in a 250ml round bottom flask, add 600ml of water and 0.6ml of ammonia water, stir at room temperature for 48h, and obtain a crude theabrownin solution. The solution was transferred to a 250ml separatory funnel, extracted three times with ethyl acetate, the water phase was extracted three times with an equal volume of n-butanol, and the water phase was dried under reduced pressure to obtain 600 mg of homemade theabrownin.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention provides a method for preparing a similar substance of theabrownin by taking gallic acid as a raw material. The method particularly comprises the following steps of: 1, adding the gallic acid into ammonia water for reaction to obtain crude theabrownin; 2, extracting the crude theabrownin by ethyl acetate to obtain a water layer; 3, extracting the water layer by normal butanol to obtain a water layer; and 4, drying to obtain the theabrownin. By adopting the method, the problem of high consumption of puer tea for extracting the theabrownin in a conventional process is solved.

Description

Technical field: [0001] The invention relates to a method for preparing theabrownin, in particular to a method for preparing theabrownin by using gallic acid as a raw material. Background technique: [0002] Polyphenols in tea are important active substances in tea. It is a general term for various phenolic compounds in tea. 60% to 80% of the total amount is closely related to the tea soup color, taste and aroma. [0003] The water-soluble products of polyphenols are mainly theaflavins, thearubigins and theabrownins. Theabrownin is a general term for a class of products with a very complex structure formed by oxidative polymerization of catechins. During the processing of Pu-erh tea, 80% of theaflavins and thearubigins are oxidized and polymerized to form theabrownins, and their content becomes The astringency and bitterness of the tea soup are significantly reduced, coupled with the higher content of sugar and soluble water extracts, which form the material basis for the ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): C08G65/44
Inventor 顾睿李瑞明王玉张兰兰李长文周水平
Owner TIANJIN TASLY GROUP
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com