Progress in extraction of soybean oil by microwave drying
Soybean is one of the seven food crops in China, mainly distributed in the middle and north of the Songliao Plain in China and the Sanjiang Plain, the Huanghuai Plain and the middle and lower reaches of the Yangtze River. The world's major producing and exporting countries are the United States, Brazil and Argentina. Paraguay, Canada, Indonesia, Japan, North Korea, Russia and Romania have a small amount of production. The main importing countries are Japan and the European Economic Community.
Soy contains a variety of trace elements, vitamins, high-quality protein and a large number of unsaturated fatty acids. Its fatty acid composition is mainly composed of unsaturated fatty acids such as oleic acid and linoleic acid. The content of linoleic acid is as high as 50% to 65%. Raw materials for oils and high-grade natural cosmetics. Traditional soybean oil extraction methods mainly include pressing method and leaching method. Although the traditional vegetable oil preparation method can obtain more than 95% of oils and fats, the protein denaturation is serious during the oil extraction process, and it is difficult to further utilize, and there are toxic and harmful solvent residues. . The microwave drying method is a new type of oil extraction process, which is in line with the development concept of clean production and comprehensive utilization.
In recent years, with the deepening of research on the enzymatic extraction of rapeseed oil, peanut oil and walnut oil at home and abroad, the research report on the extraction of soybean oil by microwave drying equipment technology has gradually increased.
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