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Method for comprehensively extracting theabrownin and tea polysaccharide by taking dark tea as active ingredients

A technology for theabrownin and tea polysaccharides, which is applied in the field of comprehensive extraction and preparation of theabrownin and tea polysaccharides, can solve the problems of few theabrownin extraction technologies, and achieve the effects of easy industrial preparation, increased yield, and low cost

Active Publication Date: 2015-05-06
陈小强
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, there are few techniques for extracting theabrownin

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Take 1000 grams of Pu'er tea (cooked tea) as raw material, crush it, spray water on the broken tea leaves, the amount of water sprayed is 4.0% of the quality of the tea leaves, put the water-containing black tea material in an expansion tank, and apply The pressure is 0.21 MPa, the temperature is adjusted to 78°C, and the pressure treatment is carried out for 15 minutes, and then the pressure relief system is turned on to reduce the pressure in the tank to 0.075 MPa. raw black tea. Add water 80 times its mass to the raw material of dark tea puffed with variable temperature and pressure difference, extract at 58°C for 0.8 hours, and then filter with a filter to obtain a filtrate.

[0016] The filtrate is first filtered through a microfiltration membrane with a cut-off pore size of 0.25 microns, and the microfiltration filtrate is then filtered through an ultrafiltration membrane with a molecular weight cut-off of 1500 Daltons to obtain an ultrafiltration retentate and an...

Embodiment 2

[0018] Take 2000 grams of Anhua black tea as raw material, crush it, spray water on the broken tea leaves, the amount of water sprayed is 20.0% of the quality of the tea leaves, put the water-containing black tea material in an expansion tank, and apply 0.65 MPa pressure, adjust the temperature to 95°C, carry out pressurization treatment, hold time for 30 minutes, then open the pressure relief system, reduce the pressure in the tank to 0.04 MPa, adjust the temperature to 76°C, hold time for 30 minutes, and obtain the puffing treatment with variable temperature and pressure difference Black tea raw material. Add water 20 times its mass to the black tea raw material puffed with variable temperature and pressure difference, extract at 88° C. for 4 hours, and then filter with gauze to obtain a filtrate. The filtrate is first filtered through a microfiltration membrane with a cut-off aperture of 2.0 microns, and the microfiltration filtrate is then filtered through an ultrafiltrati...

Embodiment 3

[0020] Take 5000 grams of Liubao tea as raw material, crush it, spray water on the broken tea leaves, the amount of water sprayed is 40.0% of the quality of the tea leaves, put the water-containing black tea material in an expansion tank, and apply 0.80 MPa Pressure, adjust the temperature to 125°C, carry out pressurization treatment, hold for 48 minutes, then open the pressure relief system, reduce the pressure in the tank to 0.015MPa, adjust the temperature to 90°C, hold for 50 minutes, and obtain black puffed with variable temperature and pressure difference Tea ingredients. The dark tea raw material puffed with variable temperature and pressure difference is added with water 6 times its mass, extracted at 98°C for 5 hours, and then filtered with gauze or a filter to obtain a filtrate. The filtrate is first filtered through a microfiltration membrane with a cut-off pore size of 8.0 microns, and the microfiltration filtrate is then filtered through an ultrafiltration membran...

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Abstract

The invention relates to a method for comprehensively extracting theabrownin and tea polysaccharide by taking dark tea as active ingredients. The method comprises the following steps of: smashing a certain mass of dark tea used as active ingredients, spraying water onto dark tea chips, wherein the amount of the sprayed water is 3.0-50.0wt% of tea leaves; placing the water-containing dark tea materials into a swelling tank, performing varied-temperature differential pressure swelling under certain conditions, adding 5-100 times by mass of water into the swelled dark tea materials, extracting at 50-98 DEG C for 0.4-10 hours, filtering through a gauze or a filter screen to obtain a filtrate; filtering the filtrate through a micro-filtration membrane with filtration aperture of 0.20-8.0micrometers, and filtering the micro-filtrated filtrate with an ultra-filtration membrane with molecular weight cutoff of 1,000-7,000 daltons, to obtain ultra-filtration trapped fluid and ultra-filtration filtrate; adding edible-grade hydrogen peroxide into ultra-filtration trapped fluid for decoloration, wherein the concentration of the hydrogen peroxide is 0.03-3.7%; adding 3-4 times 95% alcohol into the decolorized trapped fluid, standing for 2-10 hours to obtain an ethanol precipitate; performing vacuum freeze-drying or spray-drying on the precipitate to obtain tea polysaccharide; performing reverse osmosis membrane concentration or rotary evaporation concentration on the ultra-filtration filtrate to obtain concentrated liquor, and performing spray-drying or vacuum freeze-drying on the concentrated liquor to obtain theabrownin.

Description

technical field [0001] The invention relates to the technical field of tea deep processing, in particular to a method for comprehensively extracting and preparing theabrownin and tea polysaccharide from black tea. Background technique [0002] Dark tea has health care effects on human health, such as effectively lowering blood fat and blood pressure, and has a significant preventive effect on cardiovascular and cerebrovascular diseases. This has a significant correlation with its biochemical component theabrownin, which is fermented in the heap of black tea In the process of processing such as tea polyphenols, the compounds mainly composed of tea polyphenols are deeply oxidized and polymerized under the action of heat, enzymes and microorganisms to produce a kind of complex natural polymers with inhomogeneous molecular weight and water solubility. They are Puer tea and Anhua black tea. It can also be used as ingredients and functional raw materials of traditional food and he...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A23F3/22A23F3/18
Inventor 陈小强
Owner 陈小强
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