Processing method of corn oil

Abstract

The invention discloses a processing method of corn oil. The processing method comprises the following steps of step 1, preparing crude corn oil; step 2, adding phospholipase C to degum for the firsttime, so as to obtain the primary degummed corn oil; step 3, adding phospholipase A1 to degum for the second time, so as to obtain the secondary degummed corn oil; step 4, performing base refining anddeacidifying on the secondary degummed corn oil, so as to obtain the deacidified corn oil; step 5, adding waste argil into the deacidified corn oil to pre-discolor, so as to obtain the pre-discoloredcorn oil; adding attapulgite and activated carbon into the pre-discolored corn oil to re-discolor, so as to obtain the re-discolored corn oil; step 6, deodorizing the re-discolored corn oil, so as toobtain the finished corn oil. The processing method of the corn oil has the advantages that the safe and environment-friendly effects are realized, the technology is simple, the operation is rapid, the cost is low, the refining rate is high, and the processing method is suitable for industrial production of corn oil.

Description

technical field [0001] The invention relates to the technical field of oil processing, in particular to a method for processing corn oil. Background technique [0002] Corn oil, also known as soybean oil, is obtained by pressing or leaching corn. It is one of the most commonly used edible oils in the world, and it is also the main edible oil for Chinese people, especially northerners. The fatty acid composition of corn oil is excellent, containing 17.7-28.0% of oleic acid, 49.8-59.0% of linoleic acid, 5.0-11.0% of linolenic acid, rich in unsaturated fatty acids, and also rich in various micronutrients, vitamins in crude corn oil The E content is 90-296mg / 100g, and the phytosterol content is 0.15-0.38%, which can promote growth and development, maintain physiological metabolism, reduce cholesterol content, soften blood vessels, delay aging, and prevent diseases. Therefore, corn oil is an oil with high nutritional value and great edible value. [0003] For corn oil processin...

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Problems solved by technology

[0003] For corn oil processing, the general refining technology is commonly used in the prior art, which generally has serious over-processing problems, which increases the amount of corn oil refining raw and auxiliary materials, increases the consumption and energy consumption of oil refining, and processes waste water and waste residues. Exceeding the emission standards, the environment is damaged, and the original micronutrients in corn oil are removed by over-processing, resulting in a decline in the nutritional quality of corn oil. At the same time, over-processing also makes harmful oils such as trans fatty acids in the oil The content of accompanying substances increases, which reduces the safety of oil consumption

[0004] In the existing patent CN102293264A "A Moderately Processed Vegetable Oil and Its Preparation Method", a combination of processes such as twice degumming, low-temperature alkali refining, waste clay pre-decolorization-clay re-bleaching, combined tower deodorization, etc. are used to moderately refine the oil, although This patent adopts twice degumming and low-temperature alkali refining technology, and the effect of degumming and deacidification is better, but consumes a lot of water and produces a lot of wastewater, which increases the difficulty of wastewater treatment, and at the same time, the loss of neutral oil also increases; patent CN102492548A In "A New Method for Producing Corn Oil Based on Moderate Clay Clay Decolorization and High Temperature Treatment", Clay Clay is used to remove plant pigments in oil, and then heat-sensitive substances are removed through high temperature to obtain qualified corn oil. The production amount of formula fatty acid is low, and the production cost is also appropriately reduced. However, the high-temperature treatment under vacuum makes the vitamin E and phytosterol content in the oil largely removed. Therefore, this method reduces the nutritional quality of the oil, which is not the case in oil refining. Hopeful; patent CN102517142A "a zero-trans fatty acid multi-dimensional first-grade corn oil and its preparation method" adopts double enzyme degumming / super degumming-anhydrous long-mixed deacidification coupling technology and low-activity decolorizing agent two-step decolorization technology , low-temperature short-time / two-stage capture reflux deodorization and other technologies to achieve moderate processing of corn, thereby producing zero-trans fatty acid multi-dimensional first-grade corn oil. Although the content of trans fatty acids is low and the nutrients are retained, the process line is long. and has limited applicability

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