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Preparation method of high-tea-polyphenol high-caffeine cold-soluble tea powder

A technology for caffeine and tea polyphenols is applied in the field of preparation technology of cold-soluble tea powder, which can solve the problems of low yield and the like, and achieve the effects of good cold-solubility, low equipment requirements and simple operation process.

Active Publication Date: 2022-06-03
ZHEJIANG UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

CN201610990227.4 The combination of low-temperature tea washing and high-temperature extraction technology realizes the preparation of high-tea polyphenols instant green tea powder, but the yield is low, and the yield of by-products is 2.5 to 3.5 times that of high-tea polyphenols tea powder

Method used

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  • Preparation method of high-tea-polyphenol high-caffeine cold-soluble tea powder
  • Preparation method of high-tea-polyphenol high-caffeine cold-soluble tea powder
  • Preparation method of high-tea-polyphenol high-caffeine cold-soluble tea powder

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] Embodiment 1, a kind of preparation method of high tea polyphenol and high caffeine cold soluble type tea powder, carry out the following steps successively:

[0044] ①, tea thermal expansion:

[0045] Soak 10kg of tea samples in 10kg of boiling water and stir for 15min to make the tea leaves fully absorb water, that is, make the tea leaves fully thermally swell;

[0046] That is, the solid-liquid ratio is 1:1;

[0047] ②, cold punch:

[0048] In step 1. in the gained, add the cold water of 80kg, after evenly stirring (stirring time is about 3 minutes), filter, respectively obtain tea residue and filtrate (as by-product);

[0049] Described (cold water+the boiling water of step ①): the weight ratio of tea leaves=9:1;

[0050] That is, in this step ②, the solid-liquid ratio of step ① is supplemented from 1:1 to 1:9 with cold water;

[0051] ③, leaching

[0052] In step 2. the obtained tea residue, add hot water 80kg and extract at 95 ℃, and the extraction time is 30...

Embodiment 2

[0062] Embodiment 2, with respect to embodiment 1, make the following changes:

[0063] Step ①: Thermal expansion of tea leaves:

[0064] Soak 10kg of tea samples in 15kg of boiling water and stir for 8min.

[0065] That is, the solid-liquid ratio is 1:1.5;

[0066] Step 2.: add the cold water of 100kg in step 1. in the gains, after uniform stirring, filter, respectively obtain tea residue and the filtrate as by-product;

[0067] Described (cold water+the boiling water of step 1): tea leaves=(10+1.5): the weight ratio of 1;

[0068] That is, in this step ②, the solid-liquid ratio of step ① is supplemented from 1:1.5 to 1:11.5 with cold water;

[0069] Step 3. The ratio of material to liquid during leaching is 1:9, the leaching temperature is 90°C, and the leaching time is 20min;

[0070] Step ⑤, using reverse osmosis for RO membrane concentration to Brix 13.8%.

[0071] The rest are identical to Example 1.

[0072] So in the end:

[0073] Step 6. Obtain 2077.5g of high te...

Embodiment 3

[0075] Embodiment 3, a kind of preparation method of high tea polyphenol and high caffeine cold-dissolving type tea powder, carry out the following steps successively:

[0076] ①, tea thermal expansion:

[0077] Soak 20kg of tea samples in 40kg of boiling water and stir for 10min to make the tea leaves fully absorb water, that is, make the tea leaves fully thermally swell;

[0078] That is, the solid-liquid ratio is 1:2;

[0079] ②, cold punch:

[0080] In step 1) in the gained, add the cold water of 200kg, after uniform stirring, filter, respectively obtain tea residue and the filtrate as by-product;

[0081] Described (cold water+the boiling water of step ①): the weight ratio of tea leaves=12:1;

[0082] That is, in this step ②, the solid-liquid ratio of step ① is supplemented from 1:2 to 1:12 with cold water;

[0083] ③, leaching:

[0084] Add 200kg of hot water to the tea residue obtained in step 2. to extract at 100°C, and the extraction time is 40min, that is, hot w...

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Abstract

The invention belongs to the technical field of deep processing and production of tea leaves, and particularly relates to a preparation process of high-tea-polyphenol high-caffeine cold-soluble tea powder. The invention particularly discloses a preparation method of high-tea-polyphenol high-caffeine cold-soluble tea powder. The preparation method sequentially comprises the following steps: (1) thermally expanding tea leaves; (2) cold punching; (3) extracting; (4) ultrafiltration; (5) concentrating; and (6) performing spray drying to obtain the high-tea-polyphenol high-caffeine cold-soluble tea powder. On the premise of ensuring the yield, the produced instant tea powder is good in cold solubility, has no obvious precipitate after being dissolved in cold water, and does not precipitate after being stored for a long time.

Description

technical field [0001] The invention belongs to the technical field of deep processing and production of tea leaves, and particularly relates to a preparation process of cold-dissolved tea powder with high tea polyphenols and high caffeine. Background technique [0002] Instant tea is the most important tea deep-processed product in my country. At this stage, the yield is the most important production indicator of instant tea powder, but it leads to problems such as insufficient aroma and poor quality of instant tea powder, and at the same time, there is also the problem that low-priced products are difficult to meet the diversified needs of the market. Functional instant tea powder is a market trend, and high tea polyphenol and high caffeine tea powder is an emerging category of deep-processed products. Tea polyphenols and caffeine are the two most important biochemical components in tea. Tea polyphenols have antibacterial, antioxidant, anti-aging and free radical scavengi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A23F3/28A23F3/16
CPCA23F3/28A23F3/163
Inventor 方舟滔傅秀花周建彬杨路成樊龙江傅竹生陆建良
Owner ZHEJIANG UNIV
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