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Preparation method for extracting tea polyphenol from tea leaves

A technology for tea polyphenols and tea leaves, which is applied in the field of preparation of extracting tea polyphenols from tea leaves, can solve the problems of large loss of raw materials, short time, low yield and the like, so as to save energy consumption, improve product yield and product quality Good results

Inactive Publication Date: 2019-05-21
陕西卓力时代人力资源有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to overcome the problems of high energy consumption, low yield and large loss of raw materials in the existing tea polyphenol extraction method, the present invention provides a preparation method for extracting tea polyphenols from tea leaves. This method has high extraction efficiency and short time. There is no need to add any solvent, which saves energy and time, and the yield is at least 50% higher than the traditional method

Method used

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Examples

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preparation example Construction

[0024] A preparation method for extracting tea polyphenols from tea leaves, comprising the following steps:

[0025] (1) Raw material processing: chop the dried tea raw materials and put them into the extraction tank.

[0026] The specific operation of the above steps is as follows: dry the tea raw materials in the shade until the water content is lower than 10%, chop the dried tea raw materials to keep the leaf size at 3-5cm, and put the chopped tea raw materials into into the extraction tank.

[0027] (2) Straight-through steam: open the straight-through steam valve of the extraction tank, feed steam into the extraction tank, adjust the steam pressure at the same time, control the through-through heating time and the extraction temperature of the tank.

[0028] The steam pressure adjustment includes adjusting the steam pressure for the first time and adjusting the steam pressure for the second time. In the step (2), the straight-through steam valve of the extraction tank is...

Embodiment 1

[0033] The preparation method of extracting tea polyphenols from tealeaves in this specific embodiment comprises the following steps:

[0034] 1. Raw material processing: Put 500KG of shade-dried tea raw materials into a 3 cubic meter extraction tank after being chopped;

[0035] 2. Open the straight-through steam to extract tea polyphenols: open the straight-through steam valve on the extraction tank equipment, adjust the steam pressure to 0.02MPa for the first time, and heat through for 15 minutes. After the oil-water mixture comes out, adjust the steam pressure to 0.015MPa for the second time to control the tank The extraction temperature is 90°C, and the heating is continued for 1 hour;

[0036] 3. Separation: the oil-water mixture evaporated from the steam is condensed and separated in an oil-water separator, and the oil layer is collected to obtain 1900ml of tea polyphenols. The color of tea polyphenols is bright yellow, and its tea aldehyde content is 20.18%.

Embodiment 2

[0038] The preparation method of extracting tea polyphenols from tealeaves in this specific embodiment comprises the following steps:

[0039] 1. Raw material processing: Put 500KG of shade-dried tea raw materials into a 3 cubic meter extraction tank after being chopped;

[0040] 2. Open the straight-through steam to extract tea polyphenols: open the straight-through steam valve on the extraction tank equipment, adjust the steam pressure to 0.03MPa for the first time, and heat through for 15 minutes. After the oil-water mixture comes out, adjust the steam pressure to 0.02MPa for the second time to control the tank The extraction temperature is 100°C, and the continuous heating is continued for 2 hours;

[0041] 3. Separation: The oil-water mixture evaporated from the steam is condensed and separated in an oil-water separator, and the oil layer is collected to obtain 3500ml of tea polyphenols. The color of tea polyphenols is bright yellow, and its tea aldehyde content is 22.25%...

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Abstract

The invention belongs to the technical field of plant extraction, and particularly relates to a preparation method for extracting tea polyphenol from tea leaves. The method comprises the following steps: (1) raw material processing: chopping the dried tea raw material and placing the material into an extraction tank; (2) straight-through steam: opening the extraction tank through a steam valve, introducing steam into the extraction tank, adjusting the steam pressure, and controling the through straight-through heating time and the tank extraction temperature; and (3) separation: performing condensation on an oil-water mixture evaporated from the above steam and separating the material in a water-oil separator, and collecting an oil layer. In addition, the invention also provides the tea polyphenol prepared by the above preparation method. The tea polyphenol extraction process of the invention has the following advantages: 1. the steam is directly heated to extract the volatile oil, which can save energy consumption and increase product yield; 2. the raw material is in direct contact with steam, the extracted tea polyphenol are bright in color, and the product quality is good; and 3, solvents cannot be required, and no pollution is generated.

Description

technical field [0001] The invention belongs to the technical field of plant extraction, and in particular relates to a preparation method for extracting tea polyphenols from tea leaves. Background technique [0002] Tea polyphenols are the most abundant soluble components in tea, and also the most important substance for tea to exert its health care effects. The most typical representative is catechin (phenol), which has anti-oxidation (elimination of oxygen free radicals), anti-inflammatory , Reduce the incidence of cardiovascular disease, prevent cancer, reduce blood fat, reduce body fat formation, antibacterial, change the ecology of intestinal flora and many other effects. Studies have shown that after drinking a cup of tea for half an hour, the antioxidant capacity (the ability to resist oxygen free radicals) in the blood increases by 41% to 48%, and can last for one and a half hours at a high level. . Contents of the invention [0003] In order to overcome the pro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61K36/82B01D11/02B01D17/02
Inventor 程淑清牛清玲
Owner 陕西卓力时代人力资源有限公司