Method for extracting and separating thearubigins from black tea

A technology of thearubigin and black tea, which is applied in the field of extracting and separating thearubigin, can solve the problems of low thearubigin content, achieve the effects of simplifying the processing technology, making the production process safe and environmentally friendly, and saving energy

Inactive Publication Date: 2009-07-08
CHINA JILIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The object of the present invention is to provide a simple and easy process, low cost, and low cost of thearubigin in the product, aiming at the problem that the existing organic solvent extraction met

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Embodiment 1: (extraction separation thearubigin method 1)

[0026] The method proceeds as follows:

[0027] (1) Raw material preparation: collect black tea, remove impurities, pulverize, pass through a 60-mesh standard sieve, and collect the under-sieve for subsequent use;

[0028] (2) Preparation of extraction solvent: 95% edible alcohol and water are mixed into extraction solvent in a volume ratio of 5:5 for subsequent use;

[0029] (3) Solvent extraction of thearubigin: put the raw materials of step (1) in a container, add the extraction solvent and raw materials of step (2) into the container at a weight ratio of 15:1, soak at room temperature for 5 hours, and centrifuge at 3000 rpm for 15 minutes Then get supernatant 1; add 5 times the weight of extraction solvent to the residue, soak at room temperature for 10 hours, centrifuge at 3000 rpm for 15 minutes to get supernatant 2; combine supernatant 1 and supernatant 2, and rotate at 60°C Evaporate and remove the e...

Embodiment 2

[0032] Embodiment 2: (extracting and separating thearubigin method 2)

[0033] In this example, step (1) uses the tea piece leftovers of black tea as raw material; (2) mixes 95% edible alcohol and water by volume at 2.5:7.5 to form an extraction solvent; (3) grinds the tea piece leftovers Place in a container, add the extraction solvent and raw materials of step (2) into the container at a ratio of 10:1 by weight, soak for 10 hours at 50°C, and centrifuge at 3000rpm for 15 minutes to obtain supernatant 1; add 5 times the residue The weight is the same as the extraction solvent, then soaked at 50°C for 18h, centrifuged at 3000rpm for 15min to obtain the supernatant 2; (4) adding the thearubigin extract to the pretreated D4020 type macroporous adsorption resin separation column ( Inner diameter 10cm, resin height 110cm), its sample loading flow rate is 3BV / h, sample loading is 10BV, carries out desorption with 30% ethanol solution; Obtain red powder at last and be thearubigin; A...

Embodiment 3

[0034] Embodiment 3: (extraction separation thearubigin method 3)

[0035] In this example, step (1) uses the leftovers of tea powder of black tea as raw material; (2) uses tap water as extraction solvent; : 1 ratio into the container, first soaked at 80°C for 15h, centrifuged at 3000rpm for 15min to obtain supernatant 1; added 5 times the weight of tap water to the residue, soaked at 80°C for 24h, centrifuged at 3000rpm for 15min to obtain Supernatant 2; (4) Add the thearubigin extract into the pretreated HPD-300 macroporous adsorption resin separation column (inner diameter 10cm, resin height 110cm), and its loading flow rate is 1BV / h. The sample volume is 15BV, and 40% ethanol solution is used for desorption; the red powder obtained at last is thearubigin; the remaining steps and processes are the same as in Example 1.

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Abstract

The invention discloses a method for extracting and separating thearubigins from the black tea, belonging to the technical field of deep processing of tea. The method comprises: (1) preparation of raw materials; (2) preparation of the extracted solvent; (3) extraction for the solvent of thearubigins; (4) separation for the macroporous adsorption resin of thearubigins; (5) dry of products, and other processes. The method has the advantages of relatively safe and environmental-protection production flow, simple extraction equipment, convenient method, low processing cost and high content of thearubigins in the products, which is over 2.7-3 times compared with the traditional extraction method of organic solvent. The invention can be popularized and applied in the deep processing field of tea.

Description

technical field [0001] The invention relates to the technical field of tea deep processing, in particular to a method for extracting and separating thearubigin from black tea. Background technique [0002] Tea is one of the three major beverages in the world, has important health care functions, and is a recognized health food. Tea can be roughly divided into three types according to the degree of fermentation: green tea (non-fermented tea), oolong tea (semi-fermented tea) and black tea (fully fermented tea). Among them, black tea has the largest output, accounting for more than 80% of the world's total tea consumption. [0003] Tea pigment is a kind of phenolic compound formed by oxidation and polymerization of tea polyphenols during the fermentation process of black tea, and is the main functional component of black tea. Tea pigment has important physiological functions in anti-oxidation, anti-cancer, improvement and treatment of cardiovascular and cerebrovascular disease...

Claims

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Application Information

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IPC IPC(8): A23F3/18A23L1/29A23L33/00
Inventor 蒋家新贾振宝黄光荣
Owner CHINA JILIANG UNIV
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