Canola oil comes in various types-such as aromatic, pressed, solvent-extracted, and low-erucic acid varieties-and is a common staple in daily diets. Processing can be achieved through either pressing or solvent extraction; while physically pressed oil is the mainstream consumer product, many canola oil mills primarily utilize the pressing method.
The canola oil pressing process relies on mechanical pressure to extract oil without the use of additives, thereby preserving the oil's nutrients and flavor. However, pressing cannot fully extract the oil; the resulting canola press cake typically retains a residual oil content of 5% to 8%. While this may be negligible for small-scale canola oil processing plants, it significantly impacts both the quality of the canola cake and the economic returns for high-volume canola oil mills. Consequently, large-scale facilities are advised to adopt the pre-pressing and solvent extraction process.
In the pre-pressing and solvent extraction method, canola undergoes an initial pressing stage to extract approximately 80% of the oil. The resulting press cake is then crushed and fed into canola oil extraction equipment to recover the remaining oil. This combined process offers the advantage of yielding physically pressed oil while simultaneously reducing the residual oil content in the cake to below 1%, thereby increasing the total oil yield and enhancing the mill's profitability.
While the pre-pressing and solvent extraction process boasts numerous advantages-such as high production efficiency, superior oil yield, and high-quality cake-it also entails significant drawbacks, including high equipment investment costs and the need for two integrated canola oil production lines. Therefore, this method is best suited for large-scale edible oil processing plants.
Once the crude canola oil is obtained, it must undergo refining. The canola oil refining process involves degumming, degreasing, impurity removal, and dehydration to produce the final canola oil product. The grading of canola oil is closely linked to the quality of the refining equipment used; high-quality canola oil refining equipment enables the production of top-grade canola oil while minimizing oil loss during the process and increasing the final oil yield.
For canola oil pre-pressing and solvent extraction equipment, you can consult Henan Huatai Cereals & Oils Machinery Co., Ltd. The manufacturer has continuously researched, updated, and improved equipment performance over the years. We offer custom-designed edible oil extraction equipment tailored to specific capacity requirements and client needs, suitable for both pre-pressing/extraction and direct extraction processes for various oilseeds. The company maintains strict quality control during production, provides free on-site installation and commissioning, and is dedicated to delivering superior oil processing equipment and services to its customers.
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