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Whole degreased walnut powder and its preparation method and application

A technology for walnut and walnut meal, which is applied to the field of walnut degreasing whole powder and its preparation, can solve the problems that the walnut degreasing whole powder is not suitable for adding flavor and color, product browning, bitterness and astringency, etc., so as to avoid difficult preservation and reduce quality change. Effects of poor, nutritional and safety enhancements

Active Publication Date: 2020-03-31
BEIJING ACADEMY OF AGRICULTURE & FORESTRY SCIENCES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0013] Finally, if the walnut meal contains more polyphenols, it is easy to cause problems such as browning and bitterness of the product, and the prepared whole defatted walnut powder is not suitable for adding to foods that require high flavor and color

Method used

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  • Whole degreased walnut powder and its preparation method and application
  • Whole degreased walnut powder and its preparation method and application
  • Whole degreased walnut powder and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] Embodiment 1 Degreased whole walnut powder and preparation method thereof

[0048] 1. Sorting of walnut kernels: After shelling walnuts and extracting kernels, select walnut kernels without mildew and with seed coats, and remove broken walnut shells and other impurities.

[0049] 2. Hydraulic oil press pressing: the raw material used is 30kg, the temperature of the pressing chamber is controlled at 50°C, and then the following operations are performed: ①The pressure rises to 20Mpa and maintains for 15min, ②Then the pressure drops to 0Mpa, and then the pressure rises to 30Mpa , maintain for 20 minutes, repeat ①~②, can squeeze for many times, and the residual oil in walnut meal Ⅰ can reach 10%.

[0050] 3. Crushing of the walnut cake I: use a crusher to break the walnut cake I into powders with a particle size below 0.3cm.

[0051] 4. Supercritical CO 2 Extraction: Weigh 15kg of walnut meal I powder, put it into the barrel and put it into the extraction kettle, turn on ...

Embodiment 2

[0053] Embodiment 2 Degreased whole walnut powder and preparation method thereof

[0054] 1. Sorting of walnut kernels: After shelling walnuts and extracting kernels, select walnut kernels without mildew and with seed coats, and remove broken walnut shells and other impurities.

[0055] 2. Pressing by hydraulic oil press: The raw material used is 1kg, the temperature of the press chamber is controlled at 30°C, and then the following operations are performed: ①The pressure rises to 5Mpa and maintains for 5min, ②Then reduce the pressure to 0Mpa, and then raise the pressure to 20Mpa , maintain for 5 minutes, repeat ①~②, can squeeze for many times, the residual oil in walnut meal Ⅰ reaches 20%.

[0056] 3. Crushing of the walnut cake I: use a crusher to break the walnut cake I into powders with a particle size below 0.3cm.

[0057] 4. Supercritical CO 2 Extraction: Weigh 1kg of walnut meal I powder, put it into the barrel and put it into the extraction kettle, turn on the refrig...

Embodiment 3

[0059] Embodiment 3 walnut defatted whole powder and preparation method thereof

[0060] 1. Sorting of walnut kernels: After shelling walnuts and extracting kernels, select walnut kernels without mildew and with seed coats, and remove broken walnut shells and other impurities.

[0061] 2. Pressing by hydraulic oil press: The raw material used is 50kg, the temperature of the inner chamber of the oil press is controlled at 60°C, and then the following operations are performed: ①The pressure rises to 30Mpa and maintains for 20min, ②Then reduce the pressure to 0Mpa, and then reduce the pressure Raise to 40Mpa, maintain for 30 minutes, repeat ①~②, can squeeze for many times, and the residual oil in walnut meal Ⅰ reaches 15%.

[0062] 3. Crushing of the walnut cake I: use a crusher to break the walnut cake I into powders with a particle size below 0.3cm.

[0063] 4. Supercritical CO 2 Extraction: Weigh 20kg of walnut meal I powder, put it into the barrel and put it into the extrac...

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Abstract

The invention provides pure walnut skim powder and a manufacturing method thereof. The pure walnut skim powder contains walnut protein, polyphenols, crude fibers, trace elements and mineral substances. The content of walnut fat is no more than 3%, and the adverse effect on the quality of the walnut powder due to oxidation and rancidity of walnut fat is prevented. The pure walnut skim powder is made through associative de-fatting by hydraulic cold-pressing and supercritical CO2 extraction. The two methods don't cause denaturation of walnut protein, and in a pre-treatment process, peel of walnut seeds is not removed, thereby furthest preserving polyphenols in the peel and establishing foundation for well development of a curative effect. The pure walnut skim powder can be applied to a cooked wheaten food or a baked food which is low in color and taste requirements and has a walnut curative effect. The curative effect of walnut nutritional ingredients is furthest developed; reuse of by-products produced from oil expression of walnuts is promoted; and the development of walnut industry is accelerated.

Description

technical field [0001] The invention relates to the field of food engineering, in particular to a whole defatted walnut powder, a preparation method and application thereof. Background technique [0002] Walnut is one of the five major woody grain and oil tree species supported by the state. With the increase of walnut production, the deep processing and comprehensive utilization of walnut have attracted more and more attention. Walnut kernels contain 63% oil, of which more than 90% are unsaturated fatty acids. Walnut protein accounts for 15% of its kernel weight, and the protein content of walnut meal after oil extraction can reach more than 40%, which contains 8 kinds of essential amino acids, and the content of arginine and glutamic acid is quite high. It is a high-quality protein . As a by-product of walnut oil extraction---the main component of walnut meal, walnut protein has also become an important content of research and attention. In addition, walnut kernels and ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A23L25/00A23L5/20
Inventor 陈永浩郝艳宾吴吉生齐建勋董宁光吴春林王文娟
Owner BEIJING ACADEMY OF AGRICULTURE & FORESTRY SCIENCES
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