Corn oil and preparation method thereof

A corn oil and corn technology, applied in the field of biochemistry, can solve the problems of oxidative rancidity, increased peroxide value of corn oil, easy to be infected by Aspergillus flavus, etc. effect of value

Inactive Publication Date: 2016-08-24
SHANDONG YUHUANG GRAIN & OIL FOOD
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  • Abstract
  • Description
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AI Technical Summary

Problems solved by technology

[0005] At present, the nutritional functionality of corn oil has been gradually recognized and accepted by consumers, and the development of its production technology has always been concerned and continuously improved. However, there are still problems to be solved: the pigment in corn oil is insoluble in water, but soluble Therefore, in the process of oil production, the pigment is produced together with the oil, especially the oil produced by the leaching process has a darker color
Appropriately increasing the decolorization temperature is beneficial to reduce the peroxide value in corn oil; but when the decolorization temperature exceeds 85°C to 100°C, the adsorption of peroxide by the decolorizer and the oxidation catalysis of corn oil are carried out simultaneously, and the oxidation catalytic effect is greater than Adsorption increases the peroxide value of corn oil. In addition, corn raw materials are susceptible to infection by Aspergillus flavus during storage and transportation. Corn oil that has not been detoxified after processing often contains excessive aflatoxin (mainly It is aflatoxin B1), in the process of processing, high temperature is easy to produce benzopyrene, because vegetable oil contains multiple unsaturated double bonds, it is prone to oxidative rancidity in the process of storage and processing

Method used

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  • Corn oil and preparation method thereof

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Effect test

Embodiment 1

[0036] Corn crude oil is degummed by adding food-grade phosphoric acid, and then deacidified and alkali-refined by adding food-grade sodium hydroxide. The amount added is 1%-5% of the oil weight; the oil temperature is controlled at 100-110 degrees). The pressure is 300-600Pa, and then enters the finished product tank after cooling down.

Embodiment 2

[0038] A kind of preparation method of corn oil comprises the steps:

[0039] 1 Pretreatment process

[0040] Carry out sampling inspection on corn raw materials, such as water impurities, aspergillus flavus, acid value, peroxidant, oil content and other indicators, and make records; after passing the test, it will be received and put into storage.

[0041] Dry the corn so that the water content is 3-5%, soak the dried corn in boiling water for 5-8 minutes, then put it in cold water, and repeat it several times to remove the attached skin.

[0042] 2 crude oil

[0043] Crude oil is obtained by pressing the corn pretreated in step 1

[0044] 3 Degumming and alkali refining

[0045] Raise the temperature of the crude oil to 35-45°C, adjust the pH to 6.5-7, add the enzyme for degumming to the crude oil, the enzyme for degumming is: lecitase ultra enzyme (3.326U / mg), phospholipase C (100U / mg mg), laccase (10U / mg), and xylanase (1000U / mg) were added in proportions of 20mg / kg (r...

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Abstract

The present invention provides corn oil and a preparation method thereof. The preparation method comprises the following steps: pretreating, raw oil preparing, degumming and alkali refining, primary solvent evaporating and isolating, secondary solvent evaporating and isolating, dewaxing, and deodorizing. The method can effectively remove pigments and wax in the oil, combines the removal of aspergillus flavus and production of the corn oil together, does not affect the production of the corn oil, and greatly reduces the content of the aspergillus flavus. Besides, the produced corn oil retains the nutrient contents to be unchanged, is pure in taste and lasting in fragrance, can satisfy people's requirement for special grade corn oil with original juice and original tastes, is mild in reaction conditions and simple in operation, and has good application prospect.

Description

technical field [0001] The invention belongs to the technical field of biochemistry, and in particular relates to a corn oil and a preparation method thereof. Background technique [0002] Corn oil is an edible vegetable oil with high nutritional value rich in physiologically active ingredients. Corn oil contains about 86% unsaturated fatty acids, 56% of which are linoleic acid, which has the effect of lowering lipids, and is beneficial to improve the health of cardiovascular and cerebrovascular patients; corn oil is rich in vitamin E and tocotrienol , of which the content of vitamin E is 0.16-0.27%, which is higher than other vegetable oils. It is a natural antioxidant and has certain effects on human body anti-oxidation and anti-aging; corn oil is also rich in phytosterols, and the content of phytosterols reaches 1.5%. The above has the effect of lowering low-density cholesterol and assisting in lowering blood fat. Now that the corn oil industry is becoming more and mo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A23D9/04C11B1/04C11B1/06C11B3/00C11B3/06C11B3/12
CPCA23D9/04C11B1/04C11B1/06C11B3/001C11B3/003C11B3/008C11B3/06C11B3/12
Inventor 荣相栋沈小刚张业尹世亭朱礼国
Owner SHANDONG YUHUANG GRAIN & OIL FOOD
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