Seabuckthorn freeze drying method

A drying method and technology for sea buckthorn are applied in the field of sea buckthorn preservation and achieve the effects of high utilization rate of raw materials, small change in appearance and shape, and reduced loss of nutrients.

Pending Publication Date: 2019-08-06
青海青藏高原健康科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this type of storage method is only suitable for short-term storage. As time goes on, the number of rotten and bad fruits will also increase.

Method used

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  • Seabuckthorn freeze drying method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] A freeze-drying method of sea buckthorn includes the following steps:

[0019] (1) Pretreatment: Wash the sea buckthorn, drain the water, irradiate it with ultraviolet light at a wavelength of 250~260nm for 5 minutes, and then freeze it at -25°C for 30 hours. Under the condition that the rotating sieve rotates at 50 rpm, the The sea buckthorn is put into the rotating sieve and rotated for 20 minutes;

[0020] (2) Pre-freezing: According to the cooling rate of 15℃ / h, the pre-treated seabuckthorn is cooled to -35℃, and then kept for 3h;

[0021] (3) Sublimation drying: The sublimation drying is carried out in stages. Put the pre-frozen sea buckthorn in a vacuum drying bin, first keep it at -35℃ and 70Pa for 3h; then keep it at -28℃ and 30 Pa for 2h; Keep it at -22°C and 25Pa for 6h; finally, according to the heating rate of 1°C / h, continue to maintain the pressure of 25Pa and raise it to 30°C to end freeze drying;

[0022] (4) Analytical drying: Analytical drying for 1.5h at 45°...

Embodiment 2

[0024] A freeze-drying method of sea buckthorn includes the following steps:

[0025] (1) Pretreatment: Wash the sea buckthorn, drain the water, irradiate it with ultraviolet light at a wavelength of 250~260nm for 10 minutes, and then freeze it at -30°C for 24 hours. Under the condition that the rotating sieve rotates at 70 rpm, the The sea buckthorn is put into the rotating sieve and rotated for 10 minutes;

[0026] (2) Pre-freezing: according to the cooling rate of 20℃ / h, the pre-treated seabuckthorn is cooled to -40℃, and then kept for 2h;

[0027] (3) Sublimation drying: Sublimation drying is carried out in stages. Put the pre-frozen sea buckthorn in a vacuum drying bin, first keep it at -30℃, 90Pa for 4h; then keep it at -24℃, 50 Pa for 3h; Keep it at -22℃ and 25Pa for 6h; finally, according to the heating rate of 3℃ / h, continue to maintain the pressure of 25Pa and raise it to 30℃ to end freeze drying;

[0028] (4) Analytical drying: Analytical drying for 2.5h at 35°C and 100Pa....

Embodiment 3

[0030] A freeze-drying method of sea buckthorn includes the following steps:

[0031] (1) Pretreatment: Clean the sea buckthorn, drain the water, irradiate it with ultraviolet light at a wavelength of 250~260nm for 8 minutes, and then freeze it at -30°C for 26 hours. When the rotating speed of the rotary screen is 60 rpm, The sea buckthorn is put into the rotating sieve and rotated for 15 minutes;

[0032] (2) Pre-freezing: According to the cooling rate of 18℃ / h, the pre-treated sea-buckthorn is cooled to -38℃, and then kept for 2.5h;

[0033] (3) Sublimation drying: The sublimation drying is carried out in stages. Put the pre-frozen sea buckthorn in a vacuum drying bin, first keep it at -32℃ and 75Pa for 3.5h; then keep it at -26℃ and 40 Pa for 2.5h; Then keep it at -22°C and 25Pa for 6h; finally, according to the heating rate of 2°C / h, continue to maintain the pressure of 25Pa and raise it to 30°C to finish freeze drying;

[0034] (4) Analytical drying: Analytical drying for 2.2h a...

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Abstract

The invention discloses a seabuckthorn freeze drying method. The method includes the following steps: (1) pretreatment: washing the seabuckthorn, draining the water, performing ultraviolet irradiation, and after refrigeration, rotating the material by a rotating sieve; (2) pre-freezing: cooling the pretreated seabuckthorn to -35 to -40 DEG C, and then maintaining for 2 to 3 hours; (3) sublimationdrying: firstly maintaining at 3 to 4 hours at -30 to -35 DEG C and 70 to 90 Pa; then maintaining for 2 to 3 hours at -24 to -28 DEG C and 30 to 50 Pa; then maintaining at 22 DEG C and 25 Pa for 6h; finally, continuously keeping the pressure of 25 Pa and heating to 30 DEG C, and completing the freeze drying; and (4) performing analytical drying. The method provided by the invention is carried outby pre-treatment of ultraviolet irradiation and rotary sieve rotation on seabuckthorn, and is carried out in stages during sublimation drying, the loss of nutrients in seabuckthorn by traditional freeze-drying is significantly reduced, the appearance and shape of seabuckthorn are small, and the utilization rate of raw materials is high.

Description

Technical field [0001] The invention belongs to the technical field of seabuckthorn preservation, and specifically relates to a freeze-drying method of seabuckthorn. Background technique [0002] Seabuckthorn is a kind of deciduous shrub. Its characteristics are drought-tolerant, wind-sand-resistant, and can survive on saline-alkaline land, so it is widely used for soil and water conservation. Large amounts of seabuckthorn are planted in northwestern China for desert greening. Seabuckthorn fruits have high vitamin C content and are known as the king of vitamin C. Seabuckthorn is a collective name for plants and their fruits. Seabuckthorn is a plant with the same medicine and food. The roots, stems, leaves, flowers and fruits of sea buckthorn, especially sea buckthorn fruits are rich in nutrients and biologically active substances, which can be widely used in many fields of national economy such as food, medicine, light industry, aerospace, agriculture, animal husbandry and fis...

Claims

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Application Information

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IPC IPC(8): A23B7/024A23B7/015A23B7/02
CPCA23B7/024A23B7/015A23B7/02A23V2002/00A23V2300/10
Inventor 王晓平王铨张保库
Owner 青海青藏高原健康科技有限公司
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