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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 extraction techniques for theabrownin, and achieve the effects of easy industrial preparation, increased yield, and high purity

Active Publication Date: 2013-12-18
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, smash it, spray water on the tea crushed pieces, the amount of spray water is 4.0% of the quality of the tea, put the water-containing dark tea material in the puffing tank, apply The pressure is 0.21 MPa, the temperature is adjusted to 78°C, and the pressure treatment is carried out for 15 minutes. Then the pressure relief system is turned on to reduce the pressure in the tank to 0.075 MPa, the temperature is adjusted to 56°C, and the holding time is 10 minutes to obtain variable temperature differential pressure expansion treatment Raw dark tea. The dark tea raw material puffed with variable temperature and pressure difference is added with water 80 times its mass, extracted at 58°C for 0.8 hours, and then filtered with a filter to obtain a filtrate.

[0016] The filtrate is first filtered through a microfiltration membrane with a cutoff pore size of 0.25 microns, and the microfiltration filtrate is filtered thro...

Embodiment 2

[0018] Take 2000 grams of Anhua dark tea as raw material, smash it, spray water on the tea crushed pieces, the spray amount is 20.0% of the quality of the tea, put the water-containing dark tea material in the puffing tank, and apply 0.65 MPa pressure, adjust the temperature to 95℃, carry out pressure treatment, hold for 30min, then turn on the pressure relief system, reduce the pressure in the tank to 0.04 MPa, adjust the temperature to 76℃, hold time for 30min, obtain the variable temperature and pressure difference puffing treatment Raw materials for dark tea. The black tea raw material puffed with variable temperature and pressure difference is added with water 20 times its mass, extracted at 88°C for 4 hours, and then filtered with gauze to obtain the filtrate. The filtrate is first filtered through a microfiltration membrane with a cutoff pore size of 2.0 microns, and the microfiltration filtrate is filtered through an ultrafiltration membrane with a molecular weight cuto...

Embodiment 3

[0021] Using 5000 grams of Liubao tea as the raw material, crush it, spray water on the tea crushed pieces, the spraying amount is 40.0% of the quality of the tea, put the water-containing black tea material in the puffing tank, and apply 0.80 MPa Pressure, adjust the temperature to 125℃, carry out pressure treatment, hold for 48min, then turn on the pressure relief system, reduce the pressure in the tank to 0.015MPa, adjust the temperature to 90℃, hold for 50min, and obtain the black with variable temperature and pressure difference puffing treatment Tea raw materials. The black tea raw material puffed with variable temperature and pressure difference is added with water of 6 times its mass, extracted at 98°C for 5 hours, and then filtered with gauze or filter to obtain 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 filtered through an ultrafiltration membrane with a molec...

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PUM

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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 deep processing of tea, in particular to a method for comprehensively extracting and preparing theafucin and tea polysaccharides from black tea. Background technique [0002] Black tea has health benefits for human health. For example, it can effectively reduce blood lipids and blood pressure, and has a significant preventive effect on cardiovascular and cerebrovascular diseases. This has a significant correlation with its biochemical components, theafuscin, which is fermented in the heap of black tea. In the process of processing, tea polyphenol-based compounds are deeply oxidized and polymerized under the action of heat, enzymatic and microbial action to produce a class of complex natural polymers with uneven molecular weight and water solubility. They are Pu'er tea and Anhua dark tea. The characteristic functional and quality chemical components of dark teas such as Liubao tea can also be used as ingredient...

Claims

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Application Information

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IPC IPC(8): A23F3/22A23F3/18
Inventor 陈小强
Owner 陈小强
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