CN101684131A - Method for extracting tea polyphenol from tea leaves - Google Patents
Method for extracting tea polyphenol from tea leaves Download PDFInfo
- Publication number
- CN101684131A CN101684131A CN200810200349A CN200810200349A CN101684131A CN 101684131 A CN101684131 A CN 101684131A CN 200810200349 A CN200810200349 A CN 200810200349A CN 200810200349 A CN200810200349 A CN 200810200349A CN 101684131 A CN101684131 A CN 101684131A
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- China
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- tea
- polyphenol
- extracting
- filtrate
- tealeaves
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- Tea And Coffee (AREA)
- Medicines Containing Plant Substances (AREA)
Abstract
The invention relates to a method for extracting tea polyphenol from tea leaves, which is characterized by grinding the tea leaves, soaking the ground tea leaves in boiling water for 10-30min, filtering, adding calcium nitrate into filtrate and using calcium hydroxide to regulate the pH value of the filtrate, carrying out vacuum filtration and then using hydrochloric acid to dissolve filter cakes,extracting the obtained solution by ethyl acetate and preparing the tea polyphenol through desolventizing and drying. Compared with the prior art, the method has the characteristics of simple process, convenient operation, low cost, high yield and the like.
Description
Technical field
The present invention relates to the extracting method of tea-polyphenol, relate in particular to a kind of method of from tealeaves, extracting tea-polyphenol.
Background technology
Many effects of tealeaves all are because of the tea-polyphenol in the tealeaves in action.A lot of data show that all tea-polyphenol has the aging-resistant effect, and what still application at present was maximum still is used as polyphenoils with the tea leaf extract tea-polyphenol.But present tea-polyphenol extracting method costs an arm and a leg, complicated operation, and the gained tea-polyphenol is easy to go bad, and makes to yield poorly.
Summary of the invention
Purpose of the present invention is exactly that a kind of simple, convenient, cost is low, output is high method of extracting tea-polyphenol from tealeaves is provided in order to overcome the defective that above-mentioned prior art exists.
Purpose of the present invention can be achieved through the following technical solutions:
A kind of method of from tealeaves, extracting tea-polyphenol, it is characterized in that, this method is that tealeaves is pulverized, and soaks 10～30 minutes with boiling water, filters, in filtrate, add nitrocalcite, and regulate pH value of filtrate with calcium hydroxide, vacuum filtration is used the dissolving with hydrochloric acid filter cake then, gained solution by ethyl acetate extraction, is made tea-polyphenol after the precipitation drying.
Described pH value is 7～8.5.
Compared with prior art, the present invention has characteristics such as technology is simple, easy to operate, cost is low, output height, does not generate objectionable impurities in the leaching process, does not pollute, and product color is good, purity is high, good water solubility, free from extraneous odour.
Embodiment
The invention will be further described below in conjunction with specific embodiment.
Embodiment 1
A kind of method of from tealeaves, extracting tea-polyphenol, this method is that tealeaves is pulverized, soaked 10 minutes with boiling water, filter, in filtrate, add nitrocalcite, and to regulate pH value of filtrate with calcium hydroxide be 7, vacuum filtration, use the dissolving with hydrochloric acid filter cake then, gained solution by ethyl acetate extraction, is made tea-polyphenol after the precipitation drying.
Embodiment 2
A kind of method of from tealeaves, extracting tea-polyphenol, this method is that tealeaves is pulverized, soaked 20 minutes with boiling water, filter, in filtrate, add nitrocalcite, and to regulate pH value of filtrate with calcium hydroxide be 8, vacuum filtration, use the dissolving with hydrochloric acid filter cake then, gained solution by ethyl acetate extraction, is made tea-polyphenol after the precipitation drying.
Embodiment 3
A kind of method of from tealeaves, extracting tea-polyphenol, this method is that tealeaves is pulverized, soaked 30 minutes with boiling water, filter, in filtrate, add nitrocalcite, and to regulate pH value of filtrate with calcium hydroxide be 8.5, vacuum filtration, use the dissolving with hydrochloric acid filter cake then, gained solution by ethyl acetate extraction, is made tea-polyphenol after the precipitation drying.
Claims (2)
1. method of from tealeaves, extracting tea-polyphenol, it is characterized in that, this method is that tealeaves is pulverized, and soaks 10～30 minutes with boiling water, filters, in filtrate, add nitrocalcite, and regulate pH value of filtrate with calcium hydroxide, vacuum filtration is used the dissolving with hydrochloric acid filter cake then, gained solution by ethyl acetate extraction, is made tea-polyphenol after the precipitation drying.
2. a kind of method of extracting tea-polyphenol from tealeaves according to claim 1 is characterized in that described pH value is 7～8.5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810200349A CN101684131A (en) | 2008-09-24 | 2008-09-24 | Method for extracting tea polyphenol from tea leaves |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810200349A CN101684131A (en) | 2008-09-24 | 2008-09-24 | Method for extracting tea polyphenol from tea leaves |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101684131A true CN101684131A (en) | 2010-03-31 |
Family
ID=42047535
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200810200349A Pending CN101684131A (en) | 2008-09-24 | 2008-09-24 | Method for extracting tea polyphenol from tea leaves |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101684131A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102060879A (en) * | 2010-11-09 | 2011-05-18 | 西北师范大学 | Method for extracting tea polyphenol |
| CN106365700A (en) * | 2016-08-10 | 2017-02-01 | 云南尚呈生物科技有限公司 | Preparation method for agricultural fulvate with high activity |
| CN107279370A (en) * | 2017-08-27 | 2017-10-24 | 湖南古洞春茶业有限公司 | A kind of sweet-smelling dew of green tea and preparation method thereof and equipment |
-
2008
- 2008-09-24 CN CN200810200349A patent/CN101684131A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102060879A (en) * | 2010-11-09 | 2011-05-18 | 西北师范大学 | Method for extracting tea polyphenol |
| CN106365700A (en) * | 2016-08-10 | 2017-02-01 | 云南尚呈生物科技有限公司 | Preparation method for agricultural fulvate with high activity |
| CN107279370A (en) * | 2017-08-27 | 2017-10-24 | 湖南古洞春茶业有限公司 | A kind of sweet-smelling dew of green tea and preparation method thereof and equipment |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Open date: 20100331 |