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Process for efficiently extracting and utilizing tea leaves

A process and tea technology, which is applied in the field of extraction and preparation of instant tea powder, can solve problems such as strong limitations, and achieve the effects of avoiding oxidation, low production cost, and simple process

Active Publication Date: 2017-09-05
南京融点食品科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the premise of this method must be to use dry tea products with high fluorine content as raw materials, which is too restrictive and there are few such teas

Method used

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  • Process for efficiently extracting and utilizing tea leaves
  • Process for efficiently extracting and utilizing tea leaves
  • Process for efficiently extracting and utilizing tea leaves

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] Take 150kg of summer and autumn tea, crush it into powder, add 2250kg of water, extract at 80°C for 30 minutes each time to obtain green tea extract, and then centrifuge to obtain tea dregs and tea liquid. The obtained tea liquid is filtered through a ceramic membrane to obtain 326 kg of clear and translucent filtrate and 123 kg of retentate, and the filtrate was vacuum concentrated to obtain a vacuum concentrate. Add acid and salt to the above-mentioned intercepted solution (citric acid addition: 0.6kg, sodium erythorbate: 0.06kg) for acidification reaction to obtain an acidification solution, add 1.3L ethanol (concentration: 95%) alcoholization to the acidification solution 123L, and obtain the alcoholization solution About 125L was added to 125L ethyl acetate (purity 99%) for extraction, and the organic phase layer was obtained. Concentrate with a multifunctional vacuum concentrator and set the temperature at 40°C to distill off the organic solvent. Add the above conc...

Embodiment 2

[0056] Take 200kg of the same batch of green tea in Example 1, crush it into fine powder, add 3000kg of water, extract at 80°C for 30 minutes each time to obtain a green tea extract, then centrifuge to obtain tea dregs and tea liquid, and the obtained tea liquid Filtrate through a ceramic membrane to obtain 420 kg of clear and translucent filtrate and 167 kg of retentate, and the filtrate is vacuum concentrated to obtain a vacuum concentrate. Add acid and salt to the above-mentioned retentate solution (citric acid addition: 0.8kg, sodium erythorbate 0.08kg) for acidification reaction to obtain acidification solution, add 9L ethanol (concentration 95%) alcoholization to the acidification solution 168L, the obtained alcoholization solution is about 176L was added to 177L ethyl acetate (purity 99%) for extraction, and the organic phase layer obtained was concentrated with a multifunctional vacuum concentrator, and the temperature was set at 40°C to distill the organic solvent, and...

Embodiment 3

[0058] Take 350kg of the same batch of green tea in Example 1, crush it into fine powder, add 5250kg of water, extract at 80°C for 30 minutes each time to obtain a green tea extract, and then centrifuge to obtain tea dregs and tea liquid, and the obtained tea liquid Filtrate through a ceramic membrane to obtain 776 kg of clear and translucent filtrate and 251 kg of retentate, and the filtrate is vacuum concentrated to obtain a vacuum concentrate. Add acid and salt to the above-mentioned intercepted solution (citric acid addition: 1.2kg, sodium erythorbate 0.12kg) for acidification reaction to obtain an acidification solution, and then add 12L of ethanol (concentration 95%) to alcoholize the acidification solution, and the obtained alcoholization solution is about Add 260L of ethyl acetate (purity 99%) to 260L for extraction, obtain the organic phase layer and concentrate it with a multifunctional vacuum concentrator, set the temperature at 40°C to distill the organic solvent, a...

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Abstract

The invention discloses a process for efficiently extracting and utilizing tea leaves. The process comprises the following steps: taking tea leaves and adding water and carrying out countercurrent extraction to obtain an extracting solution; taking the extracting solution and carrying out solid-liquid separation to obtain tea dreg and tea soup; filtering the tea soup through a ceramic membrane to obtain retention liquid and filtrate; concentrating the filtrate in vacuum to obtain a vacuum concentrated solution; spray-drying the vacuum concentrated solution to obtain instant tea powder; taking the retention liquid and adding acid and sodium isoascorbate; carrying out acidification reaction to obtain an acidized solution; adding ethanol into the acidized solution and carrying out alcoholization reaction to obtain an alcoholized solution; adding ethyl acetate into the alcoholized solution and extracting and separating to obtain an organic phase layer and a water layer; taking the organic phase layer and concentrating in vacuum to obtain ethyl acetate and a tea polyphenol concentrated solution; recycling the ethyl acetate; adding the tea polyphenol concentrated solution into the vacuum concentrated solution and uniformly mixing; spray-drying to obtain the instant tea powder.

Description

technical field [0001] The invention relates to a method for extracting and preparing instant tea powder, in particular to a process for efficiently extracting and utilizing tea. Background technique [0002] Tea polyphenols is the general term for polyphenols in tea. It is one of the main components that form the color and aroma of tea, and is also one of the main components that tea has health care functions. As a natural antioxidant, tea polyphenols can scavenge active oxygen free radicals, precipitate or reduce heavy metal ions, and can be used as an antidote for alkaloid poisoning. Tea polyphenols can slow down people's aging speed, and the vitamins contained in it can also provide nutrition in people's body. At the same time, tea polyphenols help to inhibit the cardiovascular disease of the human body, and are also beneficial to women's beauty and skin care. Instant tea is generally made by extracting tea leaves with water, filtered or centrifuged, concentrated and dr...

Claims

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Application Information

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IPC IPC(8): A23F3/18
Inventor 唐杏燕鲍鏖天杨路成王晓霞
Owner 南京融点食品科技有限公司
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