Preparation method of low oxalic acid ultrafine green tea powder

A kind of green tea powder and ultra-fine technology, which can be used in tea treatment before extraction, etc., can solve the problem of high oxalic acid content

Inactive Publication Date: 2018-10-12
健士星生物技术研发(上海)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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  • Preparation method of low oxalic acid ultrafine green tea powder

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Embodiment 1

[0024] A preparation method of low oxalic acid superfine green tea powder, comprising the following steps:

[0025] a) Immerse the fresh raw material of the tea tree in 30 times the mass of boiling water, take it out quickly after keeping it in a boiling state for 20 seconds, and quickly cool the tea leaves with 0-5 ℃ low temperature water with 30 times the mass;

[0026] b) Mix the cooled tea leaves with low-temperature pure water at 0-5°C, the ratio of tea leaves to water is 1:5, and grind into a coarse slurry with a colloid mill, which passes through a 60-mesh sieve;

[0027] c) The coarse slurry is further processed with an ultra-high pressure homogenizer with a pressure of 20,000 psi to achieve the effect of ultra-fine crushing, and the particle size fineness reaches 1000-3000 mesh;

[0028] d) UHT sterilizes the tea slurry after ultrafine crushing at a temperature of 120-140° C. for 12 seconds;

[0029] e) The sterilized tea slurry is spray-dried at an inlet air tempera...

Embodiment 2

[0031] A preparation method of low oxalic acid superfine green tea powder, comprising the following steps:

[0032] a) Immerse the tender buds of the tea tree in 10 times the mass of boiling water, keep it in a boiling state for 10 seconds, then quickly take it out, and use 10 times the mass of 5-10°C low-temperature water to quickly cool the tea leaves;

[0033] b) Mix the cooled tea leaves with low-temperature pure water at 5-10°C, the ratio of tea leaves to water is 1:1.5, grind into a coarse slurry with a wet refiner, and pass the coarse slurry through an 80-mesh sieve.

[0034] c) The coarsely ground slurry is further processed with a high-pressure micro-jet homogenizer with a pressure of 30,000 psi to achieve the effect of ultrafine crushing;

[0035] d) After the ultrafine crushed tea slurry is packaged in a flexible package, in a closed ultra-high pressure container, water is used as a medium to apply a pressure of 500 MPa to sterilize;

[0036] e) After the sterilize...

Embodiment 3

[0038] A preparation method of low oxalic acid superfine green tea powder, comprising the following steps:

[0039] a) Immerse the fresh products of 1 bud and 1 leaf and 1 bud and 2 leaves of the tea tree in boiling water of 15 times the mass, keep it in the boiling state for 15 seconds, then take it out quickly, and use 0-℃ low-temperature water of 15 times the mass to quickly cool the tea leaves;

[0040] b) Mix the cooled tea leaves with low-temperature pure water at 0-5°C, the ratio of tea leaves to water is 1:2, grind into a coarse slurry with a colloid mill, and pass the coarse slurry through a 60-mesh sieve;

[0041] c) The coarsely ground slurry is further processed with a high-pressure micro-jet homogenizer with a pressure of 40,000 psi to achieve the effect of ultrafine crushing;

[0042] d) The tea slurry after ultrafine crushing is sterilized by UHT. The temperature is 120°C to 140°C, and the time is 12 seconds;

[0043] e) After the sterilized tea slurry is froz...

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Abstract

The present invention discloses a preparation method of low oxalic acid ultrafine green tea powder. The preparation method of the low oxalic acid ultrafine green tea powder is as follows: fresh tea leaf raw materials are directly soaked using boiling water; polyphenol oxidase in the fresh tea leaves is inactivated; at the same time, oxalic acid in the fresh tea leaves is dissolved out; and then ultrafine homogenization, sterilization and drying into powder are conducted. The content of the oxalic acid in the ultrafine green tea powder is greatly reduced; the fineness of the tea powder can reach 1,000 meshes to 3,000 meshes; the ultrafine green tea powder is bright green in color and luster, and both excellent in nutrients and mouthfeel, and can also enable populations susceptible to calculus to very well enjoy the high-quality ultrafine green tea powder.

Description

technical field [0001] The invention relates to the technical field of functional food and special medical formula diet processing, in particular to a preparation method of low oxalic acid ultrafine green tea powder. Background technique [0002] Green tea is one of the main teas in China. It refers to a drink made from the new leaves or buds of tea trees without fermentation, after greening, shaping, and drying. The green tea products are not fermented and the processing technology is simple, so they retain the natural substances of fresh leaves, and contain more nutrients such as tea polyphenols, catechins, chlorophyll, caffeine, amino acids, and vitamins. Aging, anti-cancer, anti-cancer, sterilization, anti-inflammatory, etc. have special effects, which are beyond the reach of other teas. But at the same time, the content of oxalic acid in green tea is also more. Oxalic acid is the final product in the human body, no longer participates in metabolism, and is mainly excr...

Claims

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Application Information

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IPC IPC(8): A23F3/06A23F3/12
CPCA23F3/06A23F3/12
Inventor 蔡亚揭国良车凯
Owner 健士星生物技术研发(上海)有限公司
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