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Microwave vacuum freeze-drying method

A technology of microwave vacuum and drying method, which is applied in the directions of drying solid materials, heating to dry solid materials, and non-heating to dry solid materials, etc., which can solve the problems of high equipment investment and operating costs, high product costs, and long freezing process time, etc. problem, achieve the effect of shortening drying time, saving area, and no thermal inertia

Inactive Publication Date: 2017-09-29
深圳知本康业有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, vacuum freeze-drying also has the following disadvantages: high equipment investment and operating costs, long freezing process time, and high product costs
In the prior art, there is no report on the preparation of polypeptides by microwave vacuum freeze-drying

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0030] The preparation method of cassava leaf protein polypeptide concentrate can refer to a method for microwave-assisted preparation of cassava leaf protein polypeptide disclosed in the invention patent of application number 201510906319.5.

[0031] The preparation method of mulberry leaf protein polypeptide concentrate can refer to a microwave-assisted and membrane filtration method for preparing mulberry leaf protein polypeptide disclosed in the invention patent with application number 201510908614.4.

[0032] The preparation method of milk protein polypeptide concentrate can refer to a method for preparing milk protein polypeptide assisted by high-frequency electromagnetic waves disclosed in the invention patent with application number 201510905853.4.

[0033] The preparation method of pea protein polypeptide concentrate can refer to a microwave-assisted method for preparing pea protein polypeptide disclosed in the invention patent with application number 201510905986.1. ...

Embodiment 1

[0036] A microwave vacuum freeze-drying method, comprising the following steps:

[0037] The pre-freezing step of the polypeptide concentrated solution: freezing the pre-prepared milk protein polypeptide concentrated solution, the pre-freezing temperature is -47°C, and the pre-freezing time is 6.5h; the milk protein polypeptide frozen body is obtained;

[0038] Microwave vacuum freeze-drying: The milk protein polypeptide frozen body is put into microwave vacuum freeze-drying equipment for drying, the vacuum degree is 55Pa, the microwave power is 50W, the temperature is -32°C, and the drying time is 1.5h to obtain milk protein polypeptide.

Embodiment 2

[0040] A microwave vacuum freeze-drying method, comprising the following steps:

[0041] The pre-freezing step of the polypeptide concentrated liquid: freezing the pre-prepared milk protein polypeptide concentrated liquid, the pre-freezing temperature is -40°C, and the pre-freezing time is 5 hours; the milk protein polypeptide frozen body is obtained;

[0042] Microwave vacuum freeze-drying: The milk protein polypeptide frozen body was put into microwave vacuum freeze-drying equipment for drying, the vacuum degree was 10Pa, the microwave power was 50W, the temperature was -30°C, and the drying time was 4.8h to obtain milk protein polypeptide.

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Abstract

The invention discloses a microwave vacuum freeze-drying method. The microwave vacuum freeze-drying method comprises the following steps that a concentrated polypeptide solution is frozen in advance, specifically, the prepared concentrated polypeptide solution is frozen, the pre-freezing temperature is (-40 DEG C)-(-50 DEG C), and pre-freezing lasts for 5-7 h; a frozen polypeptide body is obtained; and microwave vacuum freeze-drying is conducted, specifically, the frozen polypeptide body is put into microwave vacuum freeze-drying equipment to be dried, the vacuum degree is 10-55 Pa, the microwave power is 50-150 W, the temperature is (-30 DEG C)-(-32 DEG C), drying is carried out for 1.5-5 h, and polypeptide is obtained. The microwave vacuum freeze-drying method has the characteristics of being uniform in drying, short in drying time, high in energy utilization ratio and capable of effectively maintaining the shape, color, nutrient content and fragrance of the material. The polypeptide prepared through the method is good in solubleness, low in viscosity, resistant to gel formation, fast in in-vivo digestive absorption and high in protein utilization ratio, has low antigenicity and is free of allergic reaction.

Description

technical field [0001] The invention relates to a drying method, in particular to a microwave vacuum freeze-drying method. Background technique [0002] At present, the traditional heating method in the food field is to heat the food from the outside to the inside, and there must be a high-temperature heat source, which must be in a heated environment, and then gradually spread from the outside to the inside. It takes a long time, such as 40-50 hours, to introduce the inside of the solid to obtain the condition of thermal equilibrium. It is generally impossible to strictly insulate and seal the heating environment, and it may dissipate a lot of heat to the environment during a long heating time. The biggest disadvantage of this method is that the size of the equipment is large, and not all liquid materials can be dried. [0003] Vacuum freeze-drying, also known as sublimation drying, is based on the principle of freezing the material so that the water contained in it turns...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F26B7/00F26B5/06F26B3/347
Inventor 不公告发明人
Owner 深圳知本康业有限公司
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