Preparation process for extracting green tea polyphenols from tea

A preparation process and technology of tea polyphenols, applied in the direction of organic chemistry, etc., can solve the problems of low product yield and purity, destruction of effective components, and high production cost, and achieve the effects of good adsorption effect, improved leaching rate, and high finished product quality.

Inactive Publication Date: 2014-08-20
梁树钦
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  • Claims
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Problems solved by technology

[0010] The purpose of the present invention is to: aim at the above-mentioned existing problems, provide a kind of preparation technology that extracts tea polyphenols from tealeaves, solve the problem of serious damage to active ingredients, low product yield and purity, high production cost and pollution when extracting tea polyphenols. question

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  • Preparation process for extracting green tea polyphenols from tea
  • Preparation process for extracting green tea polyphenols from tea

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preparation example Construction

[0031] The invention provides a preparation process for extracting tea polyphenols from tea, comprising the following steps:

[0032] Step 1, tea pretreatment: select high-quality tea leaves, which are Guiping Xishan tea leaves, grind them after drying, and pass through a 60-80 mesh sieve to obtain tea powder;

[0033] Step 2, nitrogen protection: put the tea powder in step 1 in the extraction kettle, add distilled water and mix well, the mass ratio of solid to liquid is 1:6-1:15, use a vacuum pump to deoxidize, and then pass in pure nitrogen;

[0034] Step 3: Ultrasonic extraction: After nitrogen gas is introduced, ultrasonic extraction is carried out at a constant temperature to obtain a tea polyphenol solution containing residues;

[0035] Step 4, separation: filter the tea polyphenol solution containing residue in step 3 through a separator, and separate to obtain extract and filter residue;

[0036] Step 5, resin adsorption: use polyamide resin or NKA macroporous resin t...

Embodiment 1

[0045] Such as figure 1 Shown, the preparation process of extracting tea polyphenols:

[0046]Select 1000kg of high-quality Guiping Xishan tea, put the tea leaves in a dryer, and dry them at a temperature of 70°C until the dryness reaches 98%. After drying, grind them and pass through a 60-mesh sieve to obtain tea powder; In the extraction kettle, add 10000kg of distilled water and mix well, deoxygenate the distilled water with a vacuum pump, and then pass in pure nitrogen gas; after passing in nitrogen gas, carry out ultrasonic extraction at a constant temperature of 50°C, extract twice, each time for 20min, and obtain the The tea polyphenol solution of the residue; the tea polyphenol solution containing the residue is filtered through a separator to separate the extract and the filter residue, and the obtained filter residue is returned for ultrasonic extraction; the polyamide resin is used to absorb the tea polyphenol in the extract to obtain Adsorb the resin and waste liq...

Embodiment 2

[0049] Such as figure 1 Shown, the preparation process of extracting tea polyphenols:

[0050] Select 1000kg of high-quality Guiping Xishan tea, put the tea leaves in a dryer, dry them at a temperature of 100°C until the dryness reaches 98%, grind them after drying, and pass through a 60-mesh sieve to obtain tea powder; In the extraction kettle, add 6000kg of distilled water and mix well, use a vacuum pump to deoxygenate the distilled water, and then pass in pure nitrogen; after passing in nitrogen, perform ultrasonic extraction at a constant temperature of 30°C, extract 3 times, each time for 15min, and obtain The tea polyphenol solution of the residue; the tea polyphenol solution containing the residue is filtered through a separator to separate the extract and the filter residue, and the obtained filter residue is returned for ultrasonic extraction; the polyamide resin is used to absorb the tea polyphenol in the extract to obtain Adsorb the resin and waste liquid of tea po...

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Abstract

Belonging to the field of green tea polyphenol extraction processes, the invention discloses a preparation process for extracting green tea polyphenols from tea. The preparation process includes the following six steps: pretreatment of tea, nitrogen protection, ultrasonic extraction, separation and filtration, resin adsorption, concentration and drying. The process provided by the invention solves the problems of serious destruction of effective components, low product yield and purity, high production cost and pollution in existing green tea polyphenol extraction. The preparation method disclosed in the invention not only has the advantages of high recovery rate, time saving, high extraction rate and the like, but also avoids the use of toxic solvents, and is conducive to reducing energy consumption and lowering the production cost, thus having good industrial promotion value.

Description

technical field [0001] The invention relates to the field of tea polyphenol extraction technology, in particular to a preparation technology for extracting tea polyphenol from tea leaves. Background technique [0002] Guiping Xishan Tea got its name because it is produced in Guiping Xishan. The west mountain of Guiping is adjacent to the Xunjiang River, and the famous Ruquan flows by the tea garden. The spring moistens the mist and is very suitable for the growth of tea trees. It originated in the Tang Dynasty and was famous in Guangdong, Guangxi, Hunan, Fujian and other places in the Ming Dynasty. According to "Dangzhou Fuzhi" records: "Xishan tea is green in color and fragrant in taste, and it does not reduce Longjing." According to legend, monks and nuns of Xishan Temple introduced tea tree seeds from the south of the Yangtze River, so that Xishan tea can be produced here. Those who are skilled in frying Xishan tea are still the nuns of Xishan Nunnery. Later, due to po...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07G99/00
Inventor 梁树钦
Owner 梁树钦
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