Processing method of soybean oil

Abstract

The invention discloses a processing method of soybean oil. The method comprises the following steps: 1, preparing crude soybean oil; 2, adding phosphatidase C, and carrying out primary degumming treatment to obtain primary degummed soybean oil; 3, adding phosphatidase A1, and carrying out secondary degumming treatment to obtain secondary degummed soybean oil; 4, carrying out alkali refining depickling treatment to obtain depickled soybean oil; 5, adding waste white clay to the depickled soybean oil, carrying out pre-decoloring treatment to obtain pre-decolored soybean oil, adding attapulgite and active carbon to the pre-decolored soybean oil, and carrying out re-decoloring treatment to obtain re-decolored soybean oil; and 6, carrying out deodorizing treatment on the re-decolored soybean oil to obtain finished soybean oil. The processing method of the soybean oil has the advantages of safety, environmental protection, simple process, convenient operation, low cost and high refining rate, and is suitable for soybean oil processing industrial production.

Description

technical field [0001] The invention relates to the technical field of oil processing, in particular to a soybean oil processing method. Background technique [0002] Soybean oil, also known as soybean oil, is obtained by pressing or leaching soybeans. 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 soybean oil is excellent, containing 17.7-28.0% oleic acid, 49.8-59.0% linoleic acid, 5.0-11.0% linolenic acid, rich in unsaturated fatty acids, and also rich in various micronutrients, vitamins in crude soybean 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, lower cholesterol levels, soften blood vessels, delay aging, and prevent diseases. Therefore, soybean oil is an oil with high nutritional value and great edible value. [0003] For soybean oil pr...

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Problems solved by technology

[0003] For soybean oil processing, the general refining technology is commonly used in the prior art, which generally has serious over-processing problems, which increases the consumption of soybean 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 soybean oil are removed by excessive processing, resulting in a decline in the nutritional quality of soybean oil. At the same time, excessive processing also makes harmful oils such as trans fatty acids in 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 decolorization, and combined tower deodorization is 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 Soybean Oil Based on Moderate Whitening Soil Decolorization and High Temperature Treatment", firstly white clay is used to remove the plant pigments in the oil, and then heat-sensitive substances are removed through high temperature to obtain qualified soybean 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 primary soybean oil and its preparation method" adopts double enzyme degumming / super degumming-anhydrous washing long-mixing deacidification coupling technology and low-activity decolorizing agent two-step decolorization technology , low-temperature short-time / two-stage capture and reflux deodorization and other technologies to achieve moderate processing of soybeans, thereby producing zero-trans fatty acid multidimensional first-grade soybean oil. Although the content of trans fatty acids is less and the nutrients are more retained, the process line is long. and has limited applicability

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