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\Walnut protein powder and preparation method thereof

A technology of protein powder and walnut, which is applied in the direction of plant protein processing, etc., and can solve the problems of high oil content in walnut cake, intolerance to storage, limited application, etc.

Inactive Publication Date: 2014-01-29
SHAANXI TIANYU IND +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the oil content in walnut cake is still high (about 10%), which is not only not resistant to storage, but also limits its application as a raw material in food

Method used

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  • \Walnut protein powder and preparation method thereof
  • \Walnut protein powder and preparation method thereof
  • \Walnut protein powder and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Embodiment 1, investigate the influence of the particle size of different coarsely pulverized walnut cakes on extraction rate

[0031] 1) Using walnut kernels as raw materials, use a twin-screw oil press to squeeze out most of the oil at a low temperature of 70 ° C, until the mass percentage of the oil is 8%, to obtain walnut cake;

[0032] 2) After pulverizing the walnut cakes obtained in step 1) to 20, 30, 40 and 50 meshes with a hammer mill, use supercritical CO 2 The extraction equipment was used for extraction, and the extraction conditions were as follows: extraction pressure 30MPa, extraction temperature 45°C, and extraction time 2 hours. The mass percentages of oils and fats in the products obtained after extraction were 2.13%, 0.68%, 1.06% and 1.33%, respectively.

[0033] 3) Put step 2) supercritical CO 2 The extracted product is ultrafinely pulverized to a particle size of 100 meshes, and the sieving rate of the product at 100 meshes is over 95%, thereby ob...

Embodiment 2

[0040] Embodiment 2, investigate the influence of different extraction pressure on extraction rate

[0041] According to the steps of Example 1, only the number of meshes pulverized with a hammer mill in step 2) was fixed at 30 meshes, and the extraction pressure was sequentially replaced by 20 MPa, 25 MPa, 30 MPa, and 35 MPa to obtain the walnut protein powder provided by the present invention. The mass percentages of oils and fats in the product were 3.15%, 1.3%, 0.68%, and 0.63%, respectively.

[0042] The results of the extraction rates corresponding to the walnut protein powder obtained by the above-mentioned different extraction pressures, see figure 2 .

[0043] Depend on figure 2 It can be seen that when the extraction rate is in the range of 20-30MPa, the extraction rate increases rapidly with the increase of extraction pressure. When the extraction pressure reaches 30MPa, the extraction rate tends to be flat. Considering the energy consumption factor, the extra...

Embodiment 3

[0044] Embodiment 3, investigate the influence of different extraction temperatures on extraction rate

[0045] According to the steps of Example 1, only the number of meshes pulverized by the hammer mill in step 2) is fixed at 30 meshes, and the extraction temperature is sequentially replaced by 35°C, 40°C, 45°C, and 50°C to obtain the walnut protein provided by the present invention. pink. The mass percentages of oils and fats in the products were 1.66%, 1.15%, 0.68%, and 0.89%, respectively.

[0046] The results of the corresponding extraction rates of the walnut protein powder obtained from the above-mentioned different extraction temperatures, see image 3 .

[0047] Depend on image 3It can be seen that with the increase of the extraction temperature, the extraction rate first increases and then decreases. When the extraction temperature is 45 °C, the extraction rate is the largest, so the extraction temperature of 45 °C is selected as the supercritical CO 2 The opt...

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Abstract

The invention discloses a walnut protein powder and a preparation method thereof. The method comprises the following steps: 1) squeezing walnut kernels until the grease content of the walnut kernels in percentage by mass is less than 10%, thereby obtaining a walnut cake; 2) crushing the walnut cake prepared in the step 1), and carrying out supercritical CO2 extraction on the crushed walnut cake; and 3) carrying out superfine crushing on the walnut cake subjected to extraction in the step 2), thereby obtaining the walnut protein powder. The method is simple in production process operation, and easy to control. In the walnut protein powder prepared by using the method, proteins are basically not denatured, the grease content is less than 1%. A walnut protein powder product does not cause too much grease intake while providing high-quality proteins for the human body, and keeps the unique flavor of walnuts; the walnut protein powder contains no any toxic chemical additives and residuals, is uneasily subjected to oxidative deterioration, and has an extremely high nutritional value.

Description

technical field [0001] The invention relates to a walnut protein powder and a preparation method thereof. Background technique [0002] Walnut is an important economic crop in my country, and its output ranks first in the world. Walnut kernels contain about 57% to 65% oil and 15% to 21% protein. Walnuts not only have high edible value, but also have outstanding health functions. Walnut oil is rich in essential fatty acids such as linoleic acid and linolenic acid. These unsaturated fatty acids have a good health care effect on cardiovascular and cerebrovascular diseases. Walnut oil can also remove free radicals that cause aging in the body and enhance the body's antioxidant capacity. The proportion of 8 essential amino acids in walnut protein is reasonable, and the contents of glutamic acid, aspartic acid and arginine, which have important functions on human physiology, are relatively high. Among them, glutamic acid still affects the intelligence and memory development of ...

Claims

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Application Information

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IPC IPC(8): A23J3/14
Inventor 刘博王强胡晖沈敏江曹永宁刘芳宁
Owner SHAANXI TIANYU IND
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