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A high-efficiency purification method of thearubigin prepared by chemical oxidation of tea polyphenols

A technology of chemical oxidation and purification method, applied in the direction of tea extraction, etc., can solve the problems of big difference and unpredictable, and achieve the effect of simple operation, low equipment requirements, and efficient purification

Active Publication Date: 2020-04-21
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although membrane distillation technology has been used for desalination of seawater, since the product of the present invention is quite different from the existing reports, whether the current sodium chloride removal technology for other products can be used for thearubigin of the present invention The removal of sodium chloride in medium is still unpredictable

Method used

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  • A high-efficiency purification method of thearubigin prepared by chemical oxidation of tea polyphenols

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Take 50ml of tea polyphenol chemical oxidation product (liquid) in a distillation bottle, add 100ml of absolute ethanol to it, and make the whole system operate at 35°C, with a rotation speed of 40rpm and a pressure of 20mbar. Measure the alcohol content of the solution with an alcohol meter every 10min, and take 0.5ml of the solution for determining the sodium chloride content therein; draw the standard curve of the sodium chloride content-peak area with an ion chromatograph, and measure the 0.5ml of the solution taken out content of sodium chloride. After about 40 minutes, when the alcohol content of the system is 80%, measure the residual concentration of sodium chloride in the solution.

[0026] The residual concentration of sodium chloride is shown in Table 1.

Embodiment 2

[0028] Take 50ml of the chemical oxidation product of tea polyphenols in a distillation bottle, add 100ml of absolute ethanol to it, and make the whole system operate under reduced pressure at 35°C, with a rotation speed of 30rpm and a pressure of 20mbar. Measure the alcohol content of the solution with an alcohol meter every 10min, and take 0.5ml of the solution for determining the sodium chloride content therein; draw the standard curve of the sodium chloride content-peak area with an ion chromatograph, and measure the 0.5ml of the solution taken out content of sodium chloride. After about 50 minutes, when the alcohol content of the system is 80%, measure the residual concentration of sodium chloride in the solution.

[0029] The residual concentration of sodium chloride is shown in Table 1.

Embodiment 3

[0031] Take 50ml of the chemical oxidation product of tea polyphenols in a distillation bottle, add 100ml of absolute ethanol to it, and make the whole system operate at 30°C, with a rotation speed of 40rpm and a pressure of 20mbar. Measure the alcohol content of the solution with an alcohol meter every 10min, and take 0.5ml of the solution for determining the sodium chloride content therein; draw the standard curve of the sodium chloride content-peak area with an ion chromatograph, and measure the 0.5ml of the solution taken out content of sodium chloride. After about 50 minutes, when the alcohol content of the system is 80%, measure the residual concentration of sodium chloride in the solution.

[0032] The residual concentration of sodium chloride is shown in Table 1.

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Abstract

The invention discloses a method for highly efficiently purifying thearubigins prepared through chemical oxidation of tea polyphenol, and belongs to the producing technical field of removal of sodium chloride in solutions. The method comprises the following steps: mixing a chemical oxidation product of tea polyphenol and excess ethanol, stirring at a low speed under a certain pressure and at a certain temperature, and when the alcoholic strength of a mixed solution is higher than 80%, removing precipitate to obtain the high-purity thearubigins. With the method provided by invention, a good effect of removing the sodium chloride is achieved and the high-purity thearubigins is obtained; meanwhile, the method is easy to operate and low in equipment requirement and is conducive to industrial production.

Description

technical field [0001] The invention relates to a high-efficiency purification method of thearubigin prepared by chemical oxidation of tea polyphenols, and belongs to the technical field of sodium chloride removal in solution. Background technique [0002] Thearubigin is a kind of natural edible pigment produced during the fermentation process of black tea. It is a kind of phenolic substance with large molecular weight. It is the main component of the soup color of black tea. important role. Studies have shown that thearubigin has good pharmacological effects in anti-oxidation, anti-aging, anti-mutation, anti-cancer, anti-tumor, anti-inflammation, anti-leukemia, anti-toxin, prevention of obesity, and deodorization. It also has broad application prospects in the fields of food pigments, chemicals, medicine and health care. At present, the purity of thearubigin obtained by extraction in the market is generally low, and the biological activity, functional characteristics and ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A23F3/18
CPCA23F3/18
Inventor 夏书芹殷飞王贺张晓鸣韩婷于静洋
Owner JIANGNAN UNIV
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