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Method for preparing cold-soluble green tea powder and product

A green tea powder, cold-dissolving technology, applied in the direction of tea, tea extraction, food science, etc., can solve the problems of poor taste, color and luster, poor cold-solubility, etc., and achieve the effect of increasing green retention, green color and good taste.

Active Publication Date: 2014-09-10
SOUTHWEST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The invention aims at the deficiency of the traditional instant green tea processing technology, and provides a green tea powder with good cold solubility, which avoids the problems of poor cold solubility, poor taste and color caused by traditional hot water extraction and spray drying

Method used

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  • Method for preparing cold-soluble green tea powder and product
  • Method for preparing cold-soluble green tea powder and product

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] The method for preparing cold-melt green tea powder comprises the steps:

[0022] A. Select 1kg of high-quality green tea, grind it with a grinder, add 30kg of deionized water after passing through a 40-mesh sieve, seal it, and then extract it for 30min under a pressure of 100Mpa to obtain an extract;

[0023] B. Pass the extract obtained in step A through a 150-mesh filter cloth, collect the filtrate, and centrifuge the filtrate for 30 minutes at a rotating speed of 3500r / min, collect the supernatant, and obtain tea soup;

[0024] C. Concentrating the tea soup obtained in step B by reverse osmosis until the soluble solids reach 16%, to obtain a concentrated solution;

[0025] D. Put the concentrated solution obtained in step C into the refrigerator to freeze and freeze, and after freezing, vacuum freeze-dry at -40°C for 48 hours to obtain cold-soluble green tea powder.

[0026] The cold-melt green tea powder prepared in this example is 197g. Take 0.45g into a cup and ...

Embodiment 2

[0028] The method for preparing cold-melt green tea powder comprises the steps:

[0029] A. Select 1 kg of high-quality green tea, grind it with a grinder, add 20 kg of deionized water after passing through an 80-mesh sieve, seal it, and then extract it for 20 minutes under a pressure of 200 MPa to obtain an extract;

[0030] B. Pass the extract obtained in step A through a 200-mesh filter cloth, collect the filtrate, and centrifuge the filtrate for 30 minutes at a rotating speed of 4000r / min, collect the supernatant, and obtain tea soup;

[0031] C. using reverse osmosis to concentrate the tea soup gained in step B until the soluble solids reach 20%, to obtain a concentrated solution;

[0032] D. Put the concentrated solution obtained in step C into the refrigerator to freeze and freeze, and after freezing, vacuum freeze-dry at -50°C for 36 hours to obtain cold soluble green tea powder.

[0033] The cold-melt green tea powder prepared in this example is 205g. Take 0.45g into...

Embodiment 3

[0035] The method for preparing cold-melt green tea powder comprises the steps:

[0036] A. Select 1 kg of high-quality green tea, grind it with a grinder, add 15 kg of deionized water after passing through a 60-mesh sieve, seal it, and extract it for 10 minutes under a pressure of 300 MPa to obtain an extract;

[0037] B. Pass the leaching solution obtained in step A through a 300-mesh filter cloth, collect the filtrate, and centrifuge the filtrate for 30 minutes at a rotating speed of 5500r / min, collect the supernatant, and obtain tea soup;

[0038] C. Concentrating the tea soup obtained in step B by reverse osmosis until the soluble solids reach 22%, to obtain a concentrated solution;

[0039] D. Put the concentrated solution obtained in step C into the refrigerator to freeze and freeze, and after freezing, vacuum freeze-dry at -50°C for 36 hours to obtain cold soluble green tea powder.

[0040] The cold-melt green tea powder prepared in this example is 205g. Take 0.45g in...

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Abstract

The invention discloses a method for preparing cold-soluble green tea powder. The method includes the following steps that after green tea is pulverized, the pulverized green tea is filtered through a 40-80 mesh screen, deionized water is added according to the feed liquid mass ratio of 1:10-1:30, extraction is performed on the mixture for 10-30 minutes at the pressure value of 100-400MPa after the mixture is sealed, then, extract liquid is filtered with a piece of 150-300 mesh filter cloth, filtrate is collected and centrifuged for 10-40 minutes at the rotating speed of 3000r / min-5500r / min, supernatant is collected and concentrated to the state that the soluble solid accounts for 16-22%, and concentrated liquor is acquired; finally, the concentrated liquor is frozen and dried in a vacuum freezing mode at -40 - -70 DEG C for 24-48 hours, and the cold-soluble tea powder is acquired. The cold-soluble tea powder prepared with the method is good in cold-dissolving effect and capable of dissolving fast at 3-8 DEG C, the tea powder and tea soup are greener than that acquired through hot water extraction, taste mellow and sweet slightly and thus are well liked by consumers.

Description

technical field [0001] The invention belongs to the field of food, and in particular relates to a method for preparing cold soluble green tea powder, and also relates to a product prepared by the method. Background technique [0002] Green tea is made from the new leaves of the tea tree through processes such as killing greens, rolling, and drying. The products made from it retain active substances such as tea polyphenols and amino acids in green tea. Green tea is mainly drunk after soaking in hot water, but soaking is time-consuming, and the water temperature is high after soaking, so it is not suitable to drink immediately. Instant green tea is a new type of beverage, which saves the tedious steps of making tea, so it is deeply loved by consumers. However, traditional instant green tea has poor cold solubility and generally needs to be soaked in hot water, so it cannot meet the needs of consumers to quench their thirst in a hot summer, and the traditional instant green t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A23F3/16A23F3/18A23F3/26
Inventor 童华荣阮红倩曾亮
Owner SOUTHWEST UNIV
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