Method for preparing instant tea powder
A technology for instant tea powder and tea leaves, which is applied in the directions of tea, tea extraction, tea treatment before extraction, etc.
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Embodiment 1
[0012] Take 1 kg of Longjing green tea leaves, crush them, add a small amount of deionized water to infiltrate them, then add 5 kg of deionized water and extract at a low temperature of 20°C for 20 minutes, and centrifuge the extract at high speed to obtain the first extract. Add 10 kg of deionized water at 40°C to the residual tea leaves after low-temperature extraction for medium-temperature extraction for 15 minutes, and filter to remove slag to obtain a second extract. Add 5 kg of water at 70°C to the residual tea leaves extracted at medium temperature for 5 minutes, filter and remove the slag to obtain the third extract. Combine the second extract and the third extract, add compound enzyme to treat at 45°C for 20-30 minutes, then carry out disc centrifugation, and then use an ultrafiltration membrane with a molecular weight cut-off of 100,000 for ultrafiltration clarification, and then reverse The osmotic membrane is concentrated to 20Brix (Barix), the obtained concentrat...
Embodiment 2
[0014] Take 1 kg of Tieguanyin tea leaves, crush them, add a small amount of deionized water to infiltrate them, then add 5 kg of deionized water to extract at a low temperature of 30°C for 20 minutes, and centrifuge the extract at high speed to obtain the first extract. Add 10 kg of deionized water at 60°C to the residual tea leaves after low-temperature extraction for 15 minutes at medium temperature, and filter to remove slag to obtain the second extract. Add 5 kg of water at 90°C to the residual tea leaves extracted at medium temperature for 5 minutes, filter to remove residue, and obtain the third extract. Combine the second extract and the third extract, add compound enzyme to treat at 45°C for 20-30 minutes, then carry out disc centrifugation, and then use an ultrafiltration membrane with a molecular weight cut-off of 100,000 for ultrafiltration clarification, and then reverse The osmotic membrane is concentrated to 20Brix (Brix), and the obtained concentrated solution ...
Embodiment 3
[0016] Take 1 kg of Keemun black tea leaves, crush them, add a small amount of deionized water to infiltrate them, then add 5 kg of deionized water and extract at a low temperature of 30°C for 20 minutes, and centrifuge the extract at high speed to obtain the first extract. Add 10 kg of deionized water at 60°C to the residual tea leaves after low-temperature extraction for 15 minutes at medium temperature, and filter to remove slag to obtain the second extract. Add 5 kg of water at 90°C to the residual tea leaves extracted at medium temperature for 5 minutes, and filter to remove the slag to obtain the third extract. Combine the second extract and the third extract, add compound enzyme to treat at 45°C for 20 minutes, then centrifuge, then use ultrafiltration membrane with a molecular weight cut-off of 100,000 for ultrafiltration clarification, and then use reverse osmosis membrane to concentrate To 20Brix (Barix), the prepared concentrate and the first extract were combined, ...
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