Method for extracting catechin and epicatechin by using camellia plant peels

A technology of epicatechin and catechin, which is applied in the field of extracting catechin and epicatechin, and can solve problems such as numerous steps, high prices for consumers, and pushing up catechins

Active Publication Date: 2021-10-19
HUNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This technology solves problems with extracting valuable compounds from green coffee beans that are currently expensive due to their low yield or difficulty separating them into different types for use on various industries like food products. By doing this it allows for more efficient utilization of resources by producing less harmful chemicals instead of relying solely upon traditional methods.

Problems solved by technology

This patents discuss various techniques that aim at efficiently producing valuable chemical compounds called caffeine or other types of flavonoids like quercetin by selling them overseas without being able to find enough ground crops needed for commercial exploitation. Current methods involve physical separation and purifying these berries, leading to wastage costs associated with their disposal.

Method used

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  • Method for extracting catechin and epicatechin by using camellia plant peels
  • Method for extracting catechin and epicatechin by using camellia plant peels
  • Method for extracting catechin and epicatechin by using camellia plant peels

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Experimental program
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Effect test

Embodiment 1

[0024] a. Selection of raw materials:

[0025] The selected camellia varieties include Huashuo Camellia, Huajin Camellia, Huaxin Camellia, Ganxing No. 48, Ganwu No. 2, Ganwu No. 12, Ganshi No. 83-4, Xianglin No. 210, Xianglin No. 69, Cenruan No. 2, Cenruan No. 3, Changlin No. 53, Changlin No. 4, Changlin No. 40, and Changlin No. 3. Other Camellia plants selected include Guangning Red Camellia, Multi-toothed Red Camellia, Golden Camellia, Pingguo golden camellia, Zhejiang safflower camellia, Tengchong safflower camellia, red skin rough fruit tea, Liping small fruit camellia No. 2, Liping small fruit camellia No. 3; collect fresh fruits respectively, remove the seeds and leave the peel.

[0026] b. Pretreatment of raw materials:

[0027] After washing the peel, cut it into thin slices with a thickness of 0.3 mm.

[0028] c. Extraction method:

[0029] Soak 500 g of the pericarp flakes obtained after the treatment in step b with 1000 mL of food-grade ethanol aqueous solution w...

Embodiment 2

[0034] Take 500g of freshly picked Guangning Red Camellia pericarp, chop it up, and extract it with 1000mL volume fraction of 95% ethanol aqueous solution, soak for 12 hours each time, extract 4 times, combine the extracts, then concentrate under reduced pressure, add Disperse with 100mL ethanol, and filter to retain the filtrate. The filtrate was concentrated by rotary evaporation in vacuo, and then freeze-dried at low temperature to obtain 15.65 g of crude tea polyphenol mixture with a yield of 3.13%. Further purification analysis found that the main components of the crude tea polyphenol mixture were catechin, epicatechin, and catechin glycosides.

[0035] 15.65 g of the extracted crude tea polyphenol mixture was dispersed with a 50% volume fraction of ethanol aqueous solution, and then extracted three times with a mixed solvent of ethyl acetate and n-hexane at a volume ratio of 1:1, 100 mL each time. The organic phases were combined and washed once each with distilled wat...

Embodiment 3

[0043] Take 500g of freshly picked multidentate red camellia pericarp, chop it up, and extract it with 1000mL ethanol solution with a volume fraction of 95%, soaking it for 12 hours each time, extracting it 4 times, combining the extracts, concentrating under reduced pressure, adding Disperse with 100mL ethanol, and filter to retain the filtrate. The filtrate was concentrated by rotary evaporation in vacuo, and then freeze-dried at low temperature to obtain 15.25 g of crude tea polyphenol mixture with a yield of 3.05%. Further purification analysis found that the main components of the crude tea polyphenol mixture were catechin, epicatechin, and catechin glycosides.

[0044] 15.25 g of the extracted crude tea polyphenol mixture was dispersed with a 50% ethanol aqueous solution by volume, and then extracted three times with a mixed solvent of ethyl acetate and n-hexane at a volume ratio of 1:1, 100 mL each time. The organic phases were combined and washed once each with distil...

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Abstract

The invention discloses a method for extracting catechin and epicatechin by using camellia plant peels. According to the method disclosed by the invention, catechin and epicatechin are extracted by utilizing waste camellia plant peels, so that the industrial production problems of low content, more impurities, difficulty in purification, high production cost, difficulty in pigment removal and the like in the existing extraction of the catechin and the epicatechin can be solved, and the method is suitable for large-scale production; and moreover, the resource reutilization of the waste camellia oleifera peels is further promoted, and the puzzling problem of camellia oleifera production wastes is solved.

Description

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Claims

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Application Information

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Owner HUNAN UNIV
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