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Quickly dissolving tea paste, and its processing art

A processing technology, instant tea technology, applied in tea, tea extraction, food science, etc., can solve problems such as high-efficiency extraction, difficult separation, low activity, etc., to improve utilization efficiency and economic benefits, facilitate mass production, improve The effect of extraction efficiency

Inactive Publication Date: 2005-11-09
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above-mentioned process has the following disadvantages: (1) the tea leaves used for production are tender green tea leaves, and the cost is high, but the content of main functional components is low; , and it cannot guarantee that these components can be extracted efficiently; (3) The tea polyphenols obtained by high-temperature water extraction are mostly oxidized polymers with low activity, and the polymers increase the viscosity of the extract, making it difficult to separate; (4) Water extraction The efficiency of extracting tea pigment is very low, and the extraction temperature higher than 80°C can make the tea pigment turn orange-yellow or even orange-red in 30 minutes, so that the extract loses the bright color of green tea; (5) Although the microwave-assisted extraction method can Improve the extraction efficiency, but the energy consumption is large, and additional equipment is required, and the cost is high; (6) Although the cold distilled water extraction will not destroy the heat-sensitive components in the tea, it takes a long time for soaking and extraction
Chinese patent CN1057947A discloses a production process of instant tea extract——adopting high-temperature pressurized water leaching (leaching time is 4 hours) and centrifugal baking to prepare concentrated tea extract; The leaching time is longer, and the efficient dissolution of tea extract in low temperature or normal temperature water cannot be guaranteed

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Embodiment 1, a kind of instant tea paste, its processing technology comprises the following steps successively:

[0017] 1), after 5 kilograms of tea leaves are chopped, soaking in 50 liters of concentration at normal temperature is 1.5 hours in 15% aqueous ethanol solution, then filtrate 1 and filter residue are obtained through 40 mesh screen filtration;

[0018] 2), soaking above-mentioned filter residue in 25 liters of concentration is 60 minutes in 96% ethanol, discards the filter residue through 40 mesh screen filtration, and obtains filtrate II;

[0019] 3), above-mentioned filtrate I, filtrate II are merged, filter through 200 mesh screens again, obtain filtrate III;

[0020] 4), the above-mentioned filtrate III is distilled under reduced pressure at normal temperature to no alcohol smell under the pressure of 0.1Mpa, obtains the tea paste stock solution, and reclaims the ethanol of distillation gained;

[0021] 5), the above-mentioned tea paste stock solution...

Embodiment 2

[0024] Embodiment 2, a kind of instant tea paste, its processing technology comprises the following steps successively:

[0025] 1), after 5 kilograms of tea leaves are chopped, soaking in 65 liters of concentration is 1 hour in 20% aqueous ethanol solution at normal temperature, then filtrate 1 and filter residue are obtained through 30 mesh screen filtration;

[0026] 2), soaking above-mentioned filter residue in 40 liters of concentration is 30 minutes in 80% ethanol, and discards the filter residue through 20 mesh screen filtration to obtain filtrate II;

[0027] 3), above-mentioned filtrate I, filtrate II are merged, filter through 160 mesh screens again, obtain filtrate III;

[0028] 4), with above-mentioned filtrate III under the pressure of 0.3Mpa, normal temperature decompression distillation to no alcohol smell, obtain tea paste stock solution, and reclaim the ethanol of distillation gained;

[0029] 5), the above-mentioned tea paste stock solution adopts DF-2000 ty...

Embodiment 3

[0032] Embodiment 3, a kind of instant tea paste, its processing technology comprises the following steps successively:

[0033] 1), after 5 kilograms of tea leaves are chopped, soaking in 75 liters of concentration at normal temperature is 0.5 hour in 30% aqueous ethanol solution, then filtrate 1 and filter residue are obtained through 20 mesh screen filtration;

[0034] 2), soaking above-mentioned filter residue in 50 liters of concentration is 15 minutes in 70% ethanol, discards filter residue through 30 mesh screen filtration, obtains filtrate II;

[0035] 3), above-mentioned filtrate I, filtrate II are merged, filter through 120 mesh screens again, obtain filtrate III;

[0036] 4), with above-mentioned filtrate III under the pressure of 0.2Mpa, normal temperature decompression distillation to no alcohol smell, obtain tea paste stock solution, and reclaim ethanol;

[0037] 5), the above-mentioned tea paste stock solution adopts DF-2000 type vacuum freeze-drying machine to...

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Abstract

An instant tea extract is prepared through immersion extracting, filtering, concentrating and drying.

Description

technical field [0001] The invention relates to an instant tea and a processing technology thereof, in particular to an instant tea paste and a processing technology thereof. Background technique [0002] Tea is a world-recognized health drink. Tea contains more than 500 chemical components, among which tea polyphenols, tea polysaccharides, theanine, caffeine, plant pigments, etc. Diuretic and other health functions. Tea polyphenols and tea polysaccharides account for about 30% and 20% of the dry weight of tea, respectively, and are the main functional components of tea. [0003] The traditional tea-making process mostly uses spring green tea leaves as raw materials, because the amino acid content in the tea leaves is more at this time, which makes the tea soup taste better. However, the content of tea polyphenols and tea polysaccharides is higher than that of rough and old tea leaves in summer. Both my country and Japan have a tradition of using crude tea to treat diabe...

Claims

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Application Information

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IPC IPC(8): A23F3/16
Inventor 李铎张治国谢勇
Owner ZHEJIANG UNIV
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