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A technology of instant tea and tea leaves, applied in the direction of tea extraction, etc., can solve the problems of not considering the clarity, not solving the clarity, not clear enough, etc., to achieve better taste, less turbidity and precipitation, and reduce the production of macromolecular substances Effect
Active Publication Date: 2012-02-29
DAMIN FOODSTUFF ZHANGZHOU CO LTD
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This method can only use black tea leaves to process instant black tea. Although it can be dissolved in cold water, it is not clear enough
Chinese patent ZL01118449.3 discloses a processing method of instant black tea powder, extracting black tea with hot water and cooling to normal temperature, then adding pectinase, protease and amylase to enzymatically clarify the extract, and then ultrafiltration and concentration , Spray drying, to obtain a kind of instant black tea powder that will not be cloudy after cold. This method can only process instant black tea with black tea. muddy, but did not solve the problem of low clarity of its dissolution in water; Chinese patent ZL01118460.4 discloses a manufacturing method of instant black tea powder, the black tea leaves are soaked and extracted at 80-90°C, filtered, concentrated, and then Use alkali to dissolve, adjust the pH value with acid, and spray dry after centrifugation. This method can only use black tea to process instant black tea, without considering the clarity after dissolution.
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Embodiment 1
[0028] Take 200kg of green tea, crush it into powder, add 2000kg of water, extract 3 times at 95°C for 30 minutes each time to obtain green tea extract, then centrifuge and filter through membrane to obtain a clear and translucent filtrate. The membrane is concentrated until the Brix sugar content of the concentrated solution is 12 °, the above-mentioned green tea concentrated solution is carried out to alkali transfer, and potassium hydroxide solution is added to adjust the pH value to 10, and it is continuously stirred for 0.5 hour to obtain 340.2 kilograms of the transferred solution (Brix Brix content 14 °), then pass into 5 kilograms of food-grade oxygen in the above-mentioned transfer solution, allow the oxygen and the tea liquid to fully mix and react for 1 hour, then add citric acid, adjust the pH value of the tea liquid to 6.5, let stand for 0.5 hour, Centrifuge, carry out spray drying then, obtain the instant tea of the high clarity of 45.3 kilograms.
Embodiment 2
[0030] Take 200kg of crushed oolong tea, add 4000kg of water, extract once at 90°C for 1 hour each time to obtain an oolong tea extract, then centrifuge and filter through a membrane to obtain a clear and translucent filtrate, and concentrate the above filtrate with a reverse osmosis membrane. Until the Brix sugar content of the concentrated solution is 10 °, the above-mentioned oolong tea concentrated solution is carried out to alkali transfer, and potassium hydroxide solution is added to adjust the pH value to 11, and it is continuously stirred for 0.5 hours to obtain 680.1 kg of the transferred solution (Brix sugar content 13 °) , and then feed 10 kg of food-grade oxygen into the above transfer solution, let the oxygen and the tea liquid fully mix and react for 0.5 hours, then add citric acid, adjust the pH value of the tea liquid to 7.5, let stand for 0.5 hours, centrifuge, and then spray Dried to obtain 42.1 kg of instant tea with high clarity.
Embodiment 3
[0032] Take 100 kg of crushed green tea and 100 kg of crushed black tea, mix them, add 3000 kg of water, and extract once at 90°C for 3 hours each time to obtain tea extract, then centrifuge and membrane filter to obtain a clear and translucent filtrate. The filtrate is concentrated under vacuum and reduced pressure until the Brix sugar content of the concentrated solution is 5 °. The above-mentioned tea concentrated solution is subjected to alkali transfer, and sodium hydroxide solution is added to adjust the pH value to 9, and it is continuously stirred for 1 hour to obtain a transfer solution of 1180.6 kg (Brix sugar content 8°), then feed 14 kg of food-grade oxygen into the above transfer solution, let the oxygen fully mix and react with the tea liquid for 3 hours, then add citric acid, adjust the pH value of the tea liquid to 5.5, and let it stand for 0.5 hours, centrifuged, and then freeze-dried to obtain 36.1 kilograms of high-clarity instant tea.
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Abstract
The invention discloses a preparation method for instant tea, which comprises the following steps: taking tea leaves, extracting the tea leaves by adding water, and recondensing a liquid part obtainedThe invention discloses a preparation method for instant tea, which comprises the following steps: taking tea leaves, extracting the tea leaves by adding water, and recondensing a liquid part obtainedby solid-liquid separation; adding alkali into the concentrated solution to adjust the pH value to between 8.0 and 11.5, standing the solution, and taking a liquid part through the solid-liquid separ by solid-liquid separation; adding alkali into the concentrated solution to adjust the pH value to between 8.0 and 11.5, standing the solution, and taking a liquid part through the solid-liquid separation; introducing oxygen into the liquid part for oxidation reaction; and adding acid into an oxidation reaction solution to adjust the pH value to between 5.0 and 9.5, standing the solution, takingation; introducing oxygen into the liquid part for oxidation reaction; and adding acid into an oxidation reaction solution to adjust the pH value to between 5.0 and 9.5, standing the solution, takinga liquid part through the solid-liquid separation, and drying the liquid part to obtain the instant tea. Raw materials of the instant tea can be green tea, Oolong tea or black tea, have rich sources aa liquid part through the solid-liquid separation, and drying the liquid part to obtain the instant tea. Raw materials of the instant tea can be green tea, Oolong tea or black tea, have rich sources and are easy to acquire. The preparation method adjusts the pH value through basification by adding the alkali, and then introduces the oxygen for oxidation to effectively reduce generation of macromolnd are easy to acquire. The preparation method adjusts the pH value through basification by adding the alkali, and then introduces the oxygen for oxidation to effectively reduce generation of macromolecular substances in the instant tea, prevent opacity and precipitation and improve the clarity of a tea solution and the coldcut property of instant black tea; and the prepared instant tea can be comecular substances in the instant tea, prevent opacity and precipitation and improve the clarity of a tea solution and the coldcut property of instant black tea; and the prepared instant tea can be completely dissolved into water above 5 DEG C, and the tea is clear, transparent and bright and has better mouthfeel. The preparation method has simple process and easy operation, and is suitable for indpletely dissolved into water above 5 DEG C, and the tea is clear, transparent and bright and has better mouthfeel. The preparation method has simple process and easy operation, and is suitable for industrial production.ustrial production.
Description
technical field [0001] The invention relates to a method for preparing tea, in particular to a method for preparing instant tea. Background technique [0002] Instant tea is generally made by extracting tea leaves with water, filtered or centrifuged, concentrated and dried. It is a solid powder that can quickly dissolve in water, has no tea residue and maintains the unique flavor of tea. It is ready to drink and can also be used as a food and beverage preparation Raw materials. Using conventional processing methods, what kind of tea raw materials are generally used to process what kind of instant tea, and the clarity of the product is relatively poor after being dissolved in water. [0003] In the existing technology, Chinese patent ZL01118460.4 discloses a cold-water-soluble acid-resistant instant black tea powder and its manufacturing method. Black tea leaves are soaked at 80-90°C, and the obtained tea extract is immediately cooled to room temperature. After coarse filtr...
Claims
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Application Information
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