Instant decaffeinated green tea powder and preparation method thereof

A technology for decaffeinated and instant green tea, applied in the direction of tea extraction and the reduction of alkali content in tea, can solve the problems of loss of nutrients, poor cold solubility, oxidation of tea polyphenols, etc., and achieves strong applicability, low cost and good taste. Effect

Inactive Publication Date: 2015-07-08
MEIDINGBAO PLANT SCI & TECH CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This traditional method has poor cold solubility and causes the oxidation of

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0025] Example 1

[0026] (1) Mix the tea leaves with water so that the water content of the tea leaves accounts for 30% of the total weight, and stir evenly.

[0027] (2) placing the material prepared in step (1) in an extraction kettle, feeding supercritical carbon dioxide, maintaining at 50°C, 350bar, and extracting for about 6 hours, and decaffeinating it;

[0028] (3) The carbon dioxide extracted in the step (2) is washed with water and then used for circulation to decaffeinate the tea leaves prepared in the step (2).

[0029] (4) Add water to the tea leaves treated in step (2) for soaking, add 1 ton of water per 100 kg of tea leaves to mix, and adjust the pH value of the mixed solution to 5.

[0030] (5) To the mixed solution in step (4), add 1 kg of mixed enzyme per 1000 kg of mixed solution, and the mixed enzymes are 5% papain, 30% pectinase, 60% cellulase and 5% tannase (mass). percentage).

[0031] (6) Carry out a heat preservation operation on the mixed solution...

Example Embodiment

[0035] Example 2

[0036] (1) Mix tea and stevia with water (95wt% tea and 5wt% stevia) so that the water content of the raw material accounts for about 40% of the total weight, and stir well;

[0037] (2) placing the material prepared in step (1) in an extraction kettle, feeding supercritical carbon dioxide, maintaining at 40° C., 300 bar, and extracting for about 10 hours, and decaffeinating it;

[0038] (3) the carbon dioxide extracted in step (2) is washed with water and then used to recycle the raw material (95wt% tea leaves and 5wt% stevia) prepared in step (2) to decaffeinate;

[0039] (4) Add water to the raw material treated in step (2) for soaking, add 2 t of water per 100 kg of raw material to mix, and adjust the pH value of the mixed solution to be about 7;

[0040] (5) To the mixed solution in step (4), add 2 kg of mixed enzyme per 1000 kg of mixed solution, and the mixed enzyme includes 20% protease, 15% pectinase, 57% cellulase and 8% tannase (mass percentage...

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Abstract

The invention relates to instant decaffeinated green tea powder and a preparation method thereof. Supercritical carbon dioxide is adopted to extract a raw material, and then enzymolysis, membrane separation and concentration and drying are performed to obtain the instant decaffeinated green tea powder. The preparation method is simple and quick, high in extracting efficiency, short in extraction time, simple in technological process, good in applicability and low in cost. The prepared instant decaffeinated green tea powder has health-care effect, is good in taste, is easily soluble in cold water and hot water and is free of precipitates.

Description

technical field [0001] The invention relates to the field of beverages, in particular to an instant tea powder and a preparation method thereof, in particular to an instant decaffeinated instant green tea powder and a preparation method thereof. Background technique [0002] Tea has multiple functions such as anti-oxidation, anti-cancer, anti-radiation, lowering cholesterol, preventing arteriosclerosis, etc. It is one of the most popular beverages among consumers. The caffeine in tea can excite the brain and stimulate the heart. Diabetics, hypertensive patients, the elderly, pregnant women, children, etc. should not drink tea with high caffeine. After drinking tea with high caffeine for a long time, the cause physical discomfort or other side effects. Therefore, a kind of tea product with low caffeine content is demanded in the market. Supercritical carbon dioxide extraction is considered the ideal method for decaffeinating tea leaves. Chinese patent CN85102970 discloses ...

Claims

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Application Information

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IPC IPC(8): A23F3/36A23F3/30
Inventor 王宪达陈树华张阳光徐中明程光喜楼欢楼亦姝王世平彭涛
Owner MEIDINGBAO PLANT SCI & TECH CHINA
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