Corn oil and preparation method thereof

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...

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

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