Oilseeds are among the most important sources of vegetable oils worldwide and play a significant role in nutrition, human health, and various industries. In Iran as well, the cultivation and processing of oilseeds are key pillars of agricultural development and self-sufficiency in oil production.
In this article, we will explore the most important types of oilseeds and the common methods used to extract oil from them
What Are Oilseeds?
Oilseeds refer to the seeds of plants that contain a high percentage of beneficial vegetable fats. After processing, these seeds serve as the primary source for edible and industrial oil production.
In addition to oil extraction, the by-products and meal derived from them are widely used in the livestock and poultry industries as valuable sources of plant-based protein.
At Modalal Group, the processing and utilization of oilseeds are an essential part of the value chain for related industries. To learn more about Modalal’s Business Groups and their role in developing production and processing capacities, you can visit the Modalal Business Groups page.
Read More: One of the Most Critical Processes in the Food Industry
Common Types of Oilseeds
1. Soybean
Soybean is one of the most widely used oilseeds in the world. Soybean oil is rich in unsaturated fatty acids and contains no cholesterol, making it a common ingredient in the food industry and vegetable oil production.
2. Rapeseed (Canola)
Due to its high oil content and cold resistance, rapeseed is considered a strategic crop in Iran. Canola oil has a mild flavor and high nutritional value, making it ideal for cooking and salad dressings.
3. Sunflower Seed
Sunflower seed is a rich source of vitamin E and beneficial fatty acids. Owing to its clarity and high heat stability, sunflower oil is one of the most commonly used oils in the food industry.
4. Sesame Seed
Sesame is one of the oldest cultivated oilseeds, also grown in Iran. Sesame oil, known for its high heat resistance and antioxidant properties, is highly suitable for frying and medicinal purposes.
5. Flaxseed and Other Seeds
Flaxseed, safflower, almond, hazelnut, and walnut are also valuable sources of vegetable oils, though used to a lesser extent, mainly in food, cosmetic, and pharmaceutical industries.
Methods of Extracting Oil from Oilseeds
· Cold Press Method
In this process, oil is extracted without the use of heat or chemicals. Therefore, the natural nutrients and vitamins of the seeds are preserved. Oils obtained by this method are usually more expensive but of higher quality.
· Hot Press Method
Here, the seeds are heated before pressing to increase the yield of oil extraction. Although some beneficial compounds are reduced, the overall oil output is higher.
· Solvent Extraction Method
In large-scale industries, solvents such as hexane are used to extract the maximum possible oil from seeds. After separation, the solvent is evaporated, and the crude oil is sent for refining.
Conclusion
Oilseeds play a key role in meeting the country’s nutritional and industrial demands.
Understanding the characteristics of each seed and selecting the appropriate extraction method directly impact the final product’s quality.
Expanding oilseed cultivation and employing modern extraction technologies can be major steps toward self-sufficiency and improving public health.
