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Method for producing oil through hot pressing of walnuts and walnut oil rich in polyphenol

A walnut, hot pressing technology, applied in the direction of fat oil/fat production, fat production, etc., can solve the problems of backward industrialization, high price, lagging walnut oil research, etc., achieve high oil yield, increase added value, and reduce waste Effect

Inactive Publication Date: 2018-09-07
河北绿蕾农林科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] With the improvement of people's living standards, olive oil, camellia oil and other vegetable oils with certain health functions, although expensive, are more and more popular in the market, and the lag of walnut oil research has also led to the relative backwardness of its industrialization

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] (1) After cleaning the walnut raw material from which the green skin has been removed, the raw material is dried at 40° C. until the moisture content is in the range of 5-10%, and the walnut kernel is obtained by shelling;

[0023] (2) Heat walnut kernels to 100°C and stir-fry for 40 minutes to enhance the aroma of walnuts and increase the decomposition of polyphenols and phytosterols;

[0024] (3) Pressing the fried walnut kernels while they are hot at a pressing temperature of 100° C. to obtain crude walnut oil;

[0025] (4) Precipitate and filter the obtained walnut crude oil, and refine (use a horizontal screw centrifuge to filter the crude oil to remove solid impurities, then carry out low-temperature degumming at a temperature of 5°C for 12 hours, and pass through the plate frame Filtering machine is filtered, obtains finished oil), obtains walnut finished oil, and the fatty acid composition in the walnut finished oil, palmitic acid accounts for 6.44%, stearic aci...

Embodiment 2

[0028] (1) After cleaning the walnut raw material from which the green peel has been removed, the raw material is dried at 50°C until the moisture content is within the range of 5% to 10%, and the walnut kernel is obtained by shelling;

[0029] (2) Heat the walnut kernels to 120°C and stir-fry for 40 minutes to enhance the aroma of walnuts and increase the decomposition of polyphenols and phytosterols;

[0030] (3) Pressing the fried walnut kernels while they are hot at a pressing temperature of 120° C. to obtain crude walnut oil;

[0031] (4) Precipitate and filter the obtained walnut crude oil, and refine (use a horizontal screw centrifuge to filter the crude oil to remove solid impurities, then carry out low-temperature degumming at a temperature of 5°C for 12 hours, and pass through the plate frame Filtering machine is filtered, obtains finished oil), obtains walnut finished oil, and the fatty acid composition in the walnut finished oil, palmitic acid accounts for 6.95%, s...

Embodiment 3

[0034] (1) After cleaning the walnut raw material from which the green skin is removed, the raw material is dried at 45° C. until the moisture content is within the range of 5% to 10%, and the walnut kernel is obtained by shelling;

[0035] (2) Heat the walnut kernels to 140°C and stir-fry for 30 minutes to enhance the aroma of walnuts and increase the decomposition of polyphenols and phytosterols;

[0036] (3) Pressing the fried walnut kernels while they are hot at a pressing temperature of 140° C. to obtain crude walnut oil;

[0037] (4) Precipitate and filter the obtained walnut crude oil, and refine (use a horizontal screw centrifuge to filter the crude oil to remove solid impurities, then carry out low-temperature degumming at a temperature of 5°C for 12 hours, and pass through the plate frame Filtering machine is filtered, obtains finished oil), obtains walnut finished oil, and the fatty acid composition in the walnut finished oil, palmitic acid accounts for 6.87%, stear...

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Abstract

The invention discloses a method for producing oil through hot pressing of walnuts and walnut oil rich in polyphenol. The method is characterized by comprising the following steps: cleaning walnut rawmaterials of which green skins are removed, and unshelling, thus obtaining walnut kernels; stirring walnut kernels ,obtaining walnut crude oil through an oil production technology; precipitating andfiltering the walnut crude oil, and refining walnut refined oil product. The method disclosed by the invention has the beneficial effects that a new technology of a walnut-to-oil technology is opened,waste of a walnut resource is reduced, an additional value of the walnut resource is favorably increased, and industrialization can be easily realized; oil pressing is carried out by adopting a cooking temperature being 100 to 200 DEG C, the oil extraction rate of the walnuts at 180 DEG C is the highest, but the content of squalene reaches a peak value when the cooking temperature is 160 DEG C, and the taste is better; when the cooking temperature excesses 160 DEG C, the walnuts have a burnt smell. During an oil production process, the oil extraction rate is high, the obtained walnut oil is high in contents of tocopherol, polyphenol and phytosterol, and the walnut oil has the strong fragrance of the walnuts.

Description

technical field [0001] The invention relates to the technical field of preparation of walnut oil, in particular to walnut oil rich in polyphenols and its hot pressing oil production process. Background technique [0002] Walnut, also known as walnut or Qiang peach, is a plant of the Juglandaceae Juglans genus. Walnuts are rich in nutrients, rich in protein, fat, carbohydrates, mineral elements and vitamins, and also have unique advantages in medicine and health care. Walnut oil can reduce oxidative stress in the body through its antioxidant capacity, thereby reducing hyperglycemia and the production of pro-inflammatory cytokines. [0003] The oil content of walnut can reach 60-70%, ranking first among all woody oil plants, so it is called "oil depot on trees". And it is rich in unsaturated fatty acids, mainly linoleic acid, linolenic acid, oleic acid, etc., and also contains saturated fatty acids such as palmitic acid and stearic acid. In addition, walnut oil contains VA,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C11B1/04C11B1/08
CPCC11B1/04C11B1/08
Inventor 左东英王兴国赵晨伟
Owner 河北绿蕾农林科技有限公司
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