Hexane is highly effective at dissolving the oil, separating it from the solid protein fibers. Primary Extraction Methods There are two main pathways for extracting oil from flakes: mechanical pressing and chemical extraction.
Understanding the Vegetable Oil Extraction Process
Conditioning and Flaking Before entering the extraction stage, the prepared material is conditioned. Conditioning softens the seed tissues, making the cell walls more permeable and the oil easier to release.
This hexane vapor is subsequently condensed and recycled back into the system, making the process efficient and economical. The most common sources include soybeans, sunflower seeds, canola (rapeseed), peanuts, cottonseeds, and palm fruit.
The Mechanical and Chemical Extraction Process
Following cleaning, the seeds or nuts are often dehulled, where the outer shell is removed to improve oil yield and reduce fiber content. These flakes are then ready for the primary extraction process, as their increased surface area allows solvents or mechanical pressure to work far more efficiently.
More About How is vegetable oil made
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