Preparation method of instant black tea

[0021] The preparation method of instant black tea comprises the following process steps:

[0022] Get 35kg of black tea leaves, prepare 35kg of boiling water, put the 35kg of black tea leaves into the boiling water and soak for 5 minutes, extract the soluble matter of the black tea, and obtain an extract. Concentrate the extract to 10 Baume degrees at a vacuum degree of 0.1MPa or higher and a temperature of 55°C to obtain the first concentrate, then pass the first concentrate through a semi-permeable membrane to obtain the second concentrate . The second concentrated solution is frozen at a temperature of -25°C and a vacuum of 0.1 to 0.06 mm Hg, and then sublimated with ice crystals to obtain about 3.5 kg of instant black tea.

[0024] The preparation method of instant black tea comprises the following process steps:

[0025] Take 40kg of black tea leaves, prepare 40kg of boiling water, put 40kg of black tea leaves into the boiling water and soak for 6 minutes, extract the soluble matter of the black tea, and obtain an extract. Concentrate the extract to 11 degrees Baume at a vacuum degree of 0.1MPa or higher and a temperature of 55°C to obtain the first concentrated solution, and then pass the first concentrated solution through a semi-permeable membrane to obtain the second concentrated solution . The second concentrate is frozen at a temperature of -25°C and a vacuum of 0.1 to 0.06 mm Hg, and then sublimated with ice crystals to obtain about 4 kg of instant black tea.

[0027] The preparation method of instant black tea comprises the following process steps:

[0028] Get 45kg of black tea leaves, prepare 45kg of boiling water, put 45kg of black tea leaves into the boiling water and soak for 7 minutes, extract the soluble matter of the black tea, and obtain an extract. Concentrate the extract to 12 degrees Baume at a vacuum degree of 0.1 MPa or above and a temperature of 55°C to obtain the first concentrated solution, and then pass the first concentrated solution through a semi-permeable membrane to obtain the second concentrated solution . The second concentrated solution is frozen at a temperature of -25°C and a vacuum of 0.1 to 0.06 mm Hg, and then sublimated with ice crystals to obtain about 4.5 kg of instant black tea.