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Preparing method of boxthorn leaf freeze-dried powder

A technology of wolfberry leaves and freeze-dried powder, which is applied in food drying, food science, food preservation, etc., can solve the problems of limited deep processing, development and application of wolfberry leaves, and monotonous forms, and achieves long-term storage, convenient transportation, and guaranteed nutrition The effect of ingredients

Inactive Publication Date: 2017-01-11
青海省心脑血管病专科医院 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, Chinese wolfberry leaf products are mainly tea and beverages in the market, and the form is monotonous, and the deep processing and development and application of wolfberry leaves are very limited.

Method used

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  • Preparing method of boxthorn leaf freeze-dried powder

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preparation example Construction

[0013] Such as figure 1 As shown, a method for preparing Lycium barbarum leaf freeze-dried powder of the present invention is characterized in that the method comprises the following steps: 1) Preparation step of Lycium barbarum leaf concentrate

[0014] Fresh wolfberry leaves→Wash 1-3 times→Blanching for 20-50 seconds→Squeeze the juice at a slow speed→Collect the concentrated wolfberry leaf juice→Store in a freezer at -20°C - -40°C for later use;

[0015] 2) Freeze sublimation step Thaw the concentrated wolfberry leaf juice, mix it and move it into the loading tray of the vacuum freeze dryer, fill it to 12cm-15cm, move it into the freeze-drying chamber of the vacuum freeze dryer, close the door, and slowly cool down to -30°C - -40°C, it takes 2-6 hours, -40°C for 3 hours → evacuate to a vacuum of 20-30Pa → heat the board to 110°C - 100°C for 6-10 hours, the material temperature is -34°C - -38°C, carry out sublimation drying → reduce the layer temperature to 105°C - 90°C, mai...

Embodiment 1

[0020] A preparation method of Lycium barbarum leaf freeze-dried powder, characterized in that said method comprises the following steps: 1) Preparation step of Lycium barbarum leaf concentrate

[0021] Fresh goji berry leaves→Wash once with water→Blanching for 20 seconds→Squeeze the juice slowly→Collect the concentrated goji berry leaf juice→Store in a -20°C freezer for later use;

[0022] 2) Freeze sublimation step Thaw the concentrated wolfberry leaf juice, mix it and move it into the loading tray of the vacuum freeze dryer, fill it to 12cm, move it into the freeze-drying chamber of the vacuum freeze dryer, close the door, and slowly cool down to -30°C. 2 hours, -40°C for 3 hours→vacuumize to a vacuum of 20Pa→heat the board to 110°C for 6 hours, material temperature at -34°C, carry out sublimation drying→reduce the temperature of the board to 105°C, maintain for 4 hour, the temperature of the material is -30°C → continue to reduce the temperature of the plate layer to 100°C...

Embodiment 2

[0027] A preparation method of Lycium barbarum leaf freeze-dried powder, characterized in that said method comprises the following steps: 1) Preparation step of Lycium barbarum leaf concentrate

[0028] Fresh wolfberry leaves→Wash twice with water→Blanching for 35 seconds→Squeeze the juice at a slow speed→Collect the concentrated juice of wolfberry leaves→Store in a -30°C freezer for later use;

[0029] 2) Freeze sublimation step Thaw the concentrated wolfberry leaf juice, mix it and move it into the loading tray of the vacuum freeze dryer, fill it to 13.5cm, move it into the freeze-drying chamber of the vacuum freeze dryer, close the door, and slowly cool down to -35°C. It takes 4 hours, maintain at -40°C for 3 hours → evacuate to a vacuum of 25Pa → heat the layer to 105°C and maintain for 8 hours, the temperature of the material is at -36°C, carry out sublimation drying → reduce the temperature of the layer to 100°C, and maintain After 5 hours, the temperature of the materia...

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Abstract

The invention relates to the field of plant drying technology, and more particularly to a preparing method of boxthorn leaf freeze-dried powder. The method comprises the steps of 1) the preparing step of the boxthorn leaf concentrated liquid; 2) the freezing sublimation step; 3) the material analyzing and drying step continues to reduce the layer temperature to 80 o C-60 o C, maintaining 2-4 hours, the material starts to be analyzed and dried, the material temperature for 20o C-25o C -> the layer temperature has been reduced to 60o C-50o C, material temperature for 50o C-40o C, which lasted for 2-4 hours, then the delivery from warehouse and finished the freeze-drying process. The method for vacuum freeze-drying of boxthorn leaf is carried out at low temperature to obtain boxthorn leaf dry powder, which can effectively guarantee the nutritional content of boxthron leaf, the dry powder can be widely applied in food processing and other areas as food additives, and is conducive to long-term storage and transportation.

Description

technical field [0001] The invention relates to the technical field of plant drying, in particular to a method for preparing freeze-dried wolfberry leaf powder. Background technique [0002] Lycium barbarum is a deciduous shrub of the Solanaceae Lycium barbarum genus. Its fruit, leaves and root bark can be used as medicine. It is a traditional medicinal and edible plant in my country. According to a large number of studies, it has been confirmed that wolfberry leaves are rich in proteins, amino acids, vitamins, trace elements, flavonoids, alkaloids and terpenoids. In the field of food additives, ingredients and functional foods, it has great development potential and broad market prospects. Regarding the vacuum freeze-drying process of wolfberry leaves, there are literature reports on the drying process of young stems and leaves of wolfberry leaves, mainly comparing three drying processes: hot air drying, vacuum drying and vacuum freeze-drying. [0003] Qinghai Province ha...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A23L33/105A23L3/40A23L3/44
CPCA23L3/40A23L3/44A23V2002/00A23V2200/30A23V2250/21A23V2300/10A23V2300/14
Inventor 胡琳王东生杨蕾李愈娴祁生贵刘世民
Owner 青海省心脑血管病专科医院
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