Instant green tea powder and preparation method thereof

A technology for instant green tea and tea leaves, which is applied in tea, tea extraction, food science, etc., can solve the problems of long time consumption and low yield, and achieve the effect of improving quality, strong tea fragrance and good clarity

Active Publication Date: 2011-07-20
GUANGZHOU XIANGXUE PHARMA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, "A Method for Preparing Instant Green Tea Powder" applied by Zhejiang University, "A Preparation Process for Selenium-enriched Instant Green Tea Powder" applied by Wuxi Sun Lvbao Technology Co., Ltd., and "A Method for Prepa

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] The preparation of embodiment 1 instant green tea powder

[0025] 1. Harvesting of tea leaves: The picked tea leaves are young leaves, generally 3 to 4 leaves at the bud head or 2 pairs of leaves. The distance between the leaves and the stems is less than 5cm. Remove impurities and foreign objects when selecting.

[0026] 2. Spread green: spread the tea leaves naturally in a withering trough, and blow air properly to remove the water on the surface, so that the moisture content of the tea leaves can reach 70%.

[0027] 3. Finishing: use DXWS-9D microwave cleaning equipment (produced by Yixing Dingxin Microwave Equipment Co., Ltd.), control the thickness of the tea layer under 2cm during drying, control the belt transmission speed to 1.5m / min, and control the entire drying temperature at 60 ~70°C, dry the tea leaves to 8% moisture, and then place them in a cool and dry place to cool.

[0028]4. Extraction, centrifugation, microfiltration, concentration, spray drying: ta...

Embodiment 2

[0036] The preparation of embodiment 2 instant green tea powder

[0037] 1. Tea leaves: Picked tea leaves are young leaves, generally 3 to 4 leaves at the bud head or 2 pairs of leaves. The distance between the leaves and stems is less than 5cm.

[0038] 2. Green spreading: the picked tea leaves are spread naturally, with proper blowing to remove the water on the surface, so that the moisture content of the tea leaves reaches 80%.

[0039] 3. Finishing: use DXWS-9D microwave cleaning equipment, control the thickness of the tea layer to be less than 1cm during drying, control the belt transmission speed to 1.9m / min, control the entire drying temperature at 60-70°C, and dry the tea moisture to 7%. Then put it in a cool dry place to cool.

[0040] 4. Extraction, centrifugation, microfiltration, concentration, and spray drying: take 500 grams of green tea leaves after microwave cleaning, add 10 kilograms of purified water, soak for 15 minutes, put them in a JHBE-50S flash extract...

Embodiment 3

[0042] The preparation of embodiment 3 instant green tea powder

[0043] Get 500 grams of dry green tea leaves after finishing the green tea obtained in Example 1, add 1 kilogram of water, soak for 10 hours, place in a JHBE-50S flash extractor, control the rotating speed at 6000r / min, and extract for 10 minutes. The extract was filtered through 300-mesh silk cloth, the filtrate was centrifuged at 5000r / min for 10 minutes, the centrifuged liquid was micro-filtered through a ceramic membrane with a pore size of 2.0 μm, and the micro-filtrate was concentrated by a roll-type nanofiltration membrane made of aromatic polyamide composite material. Its molecular weight cut-off is 100. When concentrating, control the operating frequency of the pump to 30HZ, the inlet pressure is 1.5Mpa, concentrate to a solid content of 30%, and then spray dry the concentrated solution. 88 grams of green tea powder.

[0044] The prepared instant green tea powder is green in color, good in solubility a...

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Abstract

The invention relates to a preparation method of instant green tea powder, relating to a plant extract and a preparation method thereof in the field of foods. The instant green tea powder is prepared through processes, i.e. spreading, de-enzyming, water extraction, filtering, extract concentration and drying, by taking fresh green tea leaves as raw materials. Microwave de-enzyming and flash extraction are characterized in that the effective components of the green tea raw materials can be extracted within shorter time at lower temperature and the chlorophylls and the tea polyphenols of a product are ensured not to be damaged, thereby the extract appears in green and also the effective components and the aromatic substances of green tea are maintained to a greater degree; in addition, the steps of high-speed centrifugation, microfiltration and membrane concentration are all operated at normal temperature, therefore colors, nutrient components and aroma are beneficial to preservation, and the quality of the product is effectively enhanced.

Description

technical field [0001] The invention relates to a plant extract in the food field and a preparation method thereof, in particular to an instant green tea powder made from a water extract of green tea leaves and a preparation method thereof. Background technique [0002] China is the world's largest producer and consumer of green tea, with an annual output and sales of about 420,000 tons. Tea beverage is a beverage that is second only to water in consumption in the world. With the improvement of people's living standards, the quickening pace of social life and the development of science and technology, there are more and more processed tea products. Instant tea is a dry powdered product that is 100% soluble in hot or cold water. It has the advantages of fast dissolution, no residue left after brewing, hygiene, easy to carry, stable and not easy to deteriorate, etc. Its biggest advantage is convenience, so it is more and more popular among consumers. [0003] In recent year...

Claims

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Application Information

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IPC IPC(8): A23F3/16A23F3/22A23F3/28
Inventor 康志英王德秀连林生区秋华刘松标杨小红
Owner GUANGZHOU XIANGXUE PHARMA CO LTD
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