Both two oil production methods have advantages and disadvantages. The pressing method is natural and healthy but the oil yield is much lower, because the oil content of soybean is low, only 16-24%. However, oil yield of the solvent extraction method is much more higher. So the production of commercial soybean oil is usually use solvent extraction method. But before extracting, the soybean need to be pretreated. Below are the main soybean oil production process in soybean oil processing plant.
Pretreatment section in soybean oil processing plant:
Soybean pretreatment machine
The soybeans are first cleaned, crushed, softened, flaked, cooked and then sent to oil solvent extraction section.
Solvent extraction section in soybean oil processing plant:
First the pretreated soybeans flakiness are sent into a solvent extractors and immerged with a solvent, normally hexane. Counterflow is used as extraction system because it gives the highest yield. After removing the hexane, the extracted flakes only contain about 1% of soybean oil and is used as livestock meal or to produce food products such as soy protein. The hexane is separated from the soybean oil in evaporators. The evaporated hexane is recovered and returned to the extraction process. The hexane free crude soybean oil is then further purified.
The soybean oil got from soybean oil solvent extraction plant is crude soybean oil, and if you want to sell it in supermarket, you need add soybean oil refnery plant. You can tell us the capacity and your oil making needs, our engineers will design it for you.
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