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Method for comprehensively extracting tea essence, tea polysaccharides and tea polyphenol

A technology for comprehensive extraction and tea essence, which is applied in the field of comprehensive extraction of tea essence, tea polysaccharides and tea polyphenols, can solve the problems of poor softness, impure aroma, and high cost, and achieve simple process, good economic benefits, application prospects, and low cost low effect

Active Publication Date: 2016-05-11
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the existing tealeaves extraction method, be mostly to the extraction of single component or multiple components such as tea polysaccharide, tea polyphenol, tea saponin in the tealeaves, as a kind of method extracting tea polysaccharide and tea polyphenol from thick old green tea ( Patent No.: 200910068255.0), a method for comprehensively extracting active ingredients in tea leaves (Patent No.: 201310139402.5), but there is no patent or method for comprehensively extracting tea essence and other components from tea leaves
And existing tea essence patent or method, as a kind of green tea essence (patent number: 201210412121.8), black tea essence (patent number: 200810043528.1), a kind of black tea essence (201310214225.2), is to be prepared with synthetic spices and tea extract As a result, the aroma is impure, the softness is poor, the overall uncoordinated, and there are safety hazards
In the existing patents for extracting natural essence through tea, such as a kind of Dianhong essential oil and its preparation method (patent number: 201310055174.3), and the preparation method of natural high-concentration black tea essence (patent number: 201310330632.X), among the above preparation methods, Either supercritical extraction is used to extract essential oils, which is extremely costly, or other valuable components in tea such as tea polysaccharides and tea polyphenols cannot be separated at the same time, resulting in waste of resources

Method used

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  • Method for comprehensively extracting tea essence, tea polysaccharides and tea polyphenol

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Embodiment 1

[0023] A comprehensive extraction method of tea essence, tea polysaccharides and tea polyphenols, the process route is as follows figure 1 As shown, the specific steps are as follows:

[0024] (1) After pulverizing the oolong tea, sieve it through an 80-mesh sieve.

[0025] (2) Tea samples are rotary steamed under reduced pressure and extracted with ether: add 12 times the volume of boiling distilled water to Zhangping Shuixian Oolong tea powder, and extract the tea essence by rotary steaming under reduced pressure at 60°C and 0.08-0.10MPa vacuum for 40 minutes. Repeat the extraction twice according to the above method, combine the distillate, and then extract the distillate twice with 1 / 40 volume of double-distilled ether. The ether extract is frozen and deiced below zero degrees Celsius to remove water, and then slowly purged with nitrogen to concentrate Ether extract to obtain high-quality and high-concentration tea essence. The total ion chromatogram of tea essence is as...

Embodiment 2

[0029] A comprehensive extraction method for tea essence, tea polysaccharides and tea polyphenols, using the following steps:

[0030] (1) After the tea tree flower is pulverized, sieve through an 80-mesh sieve.

[0031] (2) Tea samples are rotary steamed under reduced pressure and extracted with ether: Add 15 times the volume of boiling distilled water to the camellia japonica powder, and extract the tea essence by rotary steaming under reduced pressure at 50°C and 0.10 MPa vacuum for 60 minutes. Repeat the extraction twice according to the above method, combine the distillate, and then extract the distillate twice with 1 / 20 volume of ether. The ether extract is frozen and deiced below zero degrees Celsius to separate the water, and then slowly purged with nitrogen to concentrate the ether extract. , to obtain high-quality and high-concentration tea essence. The rotary distilled liquid was suction-filtered with a single layer of nylon gauze, and the filter residue was sonica...

Embodiment 3

[0035] A comprehensive extraction method for tea essence, tea polysaccharides and tea polyphenols, using the following steps:

[0036] (1) After the green tea is crushed, it is sieved through an 80-mesh sieve.

[0037] (2) Tea samples are rotary steamed under reduced pressure and extracted with ether: add 10 times the volume of boiling distilled water to the green tea powder, and extract the tea essence by rotary steaming under reduced pressure at 60°C and 0.10 MPa vacuum for 45 minutes. Repeat the extraction twice according to the above method, combine the distillate, and then extract the distillate twice with 1 / 20 volume of ether. The ether extract is frozen and deiced below zero degrees Celsius to separate the water, and then slowly purged with nitrogen to concentrate the ether extract. , to obtain high-quality and high-concentration tea essence. The rotary distilled liquid was suction-filtered with a single layer of nylon gauze, and the filter residue was sonicated with 8...

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Abstract

The invention relates to a method for comprehensively extracting tea essence, tea polysaccharides and tea polyphenol. The method comprises the following steps: crushing a tea raw material, and sieving the crushed tea raw material; carrying out reduced pressure rotary evaporation; extracting an aqueous solution of the tea essence with ether, carrying out refrigeration deicing, carrying out purge concentration, carrying out pumping filtration on the obtained rotary evaporation liquid, centrifuging the obtained filtrate, and carrying out reduced pressure rotary evaporation concentration on the obtained supernatant; precipitating the obtained concentrate with ethanol, centrifuging, decolorizing the obtained crude polysaccharide precipitate with ethanol twice, drying the decolorized precipitate, and carrying out reduced pressure rotary evaporation concentration on the supernatant; and extracting the obtained concentrate with ethyl acetate, and purifying the obtained extract with macro-porous resin to obtain the tea polyphenol. Compared with the prior art, the method disclosed in the invention has the advantages of simple process, simultaneous extraction of the tea essence, tea polysaccharides and tea polyphenol in tea, obtaining of high purity and yield products, process flow shortening, improvement of the utilization rate of tea resources, realization of environmental protection and healthiness due to no introduction of harmful substances or chemical reagents in the production process, and high economic benefit and application prospect.

Description

technical field [0001] The invention relates to the technical field of tea deep processing, in particular to a method for comprehensively extracting tea essence, tea polysaccharides and tea polyphenols. Background technique [0002] Tea belongs to the Theaceae family and is an evergreen shrub or small tree plant with a plant height of 1-6 meters. Tea trees like a humid climate and are widely cultivated in the south of the Yangtze River Basin in my country. my country is the first country to discover and utilize tea trees. It is the country of origin and a major producer of tea. At present, the planting area of ​​tea gardens and tea production rank among the top in the world. [0003] Tea aroma is an important factor to measure the quality of tea, and enjoys the reputation of "lifeblood" of tea. So far, more than 700 aroma substances have been isolated from various tea leaves, including alcohols, aldehydes, ketones, lipids, lactones, acids, phenols, heterocyclic compounds, ...

Claims

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Application Information

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IPC IPC(8): C07G99/00C08B37/00C11B9/00C07D311/62
CPCC11B9/00C07D311/62C08B37/0006C07G99/00
Inventor 王元凤程利增魏新林王伟涛杨承钰
Owner SHANGHAI JIAO TONG UNIV
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