Why can peanuts be squeezed into oil?
Peanut oil is one of the common cooking oils in daily life and is popular for its rich aroma and rich nutrition. But many people may be curious why peanuts can squeeze oil out? This is closely related to the composition, structure and oil pressing process of peanuts. This article will combine popular topics and hot contents on the entire network for the past 10 days and analyze them in detail through structured data.
1. The oil and fat ingredients of peanuts
Peanuts can be squeezed oil mainly because they are rich in fat. Here is a comparison of the fat content of peanuts vs other common oil crops:
| Crop name | Fat content (%) |
|---|---|
| peanut | 44-56 |
| Soybean | 18-22 |
| Rapeseed | 40-45 |
| Sunflower seeds | 40-50 |
As can be seen from the table, the fat content of peanuts is as high as 44%-56%, which is much higher than that of soybeans and is comparable to rapeseed and sunflower seeds. This high fat content is the basis for peanuts to extract oil.
2. The cellular structure of peanuts
Peanuts are mainly stored in the oil body of their cotyledon cells. Here is a brief description of the structure of peanut cells:
| Structure name | Function |
|---|---|
| Oil body | Store grease, diameter approximately 0.5-2 micrometers |
| Cell wall | Consisting of cellulose, hemicellulose and pectin, it needs to be broken and released |
During the oil pressing process, peanuts need to go through crushing and rolling processes to destroy the cell wall structure and release the oil in the oil body.
3. The process of peanut oil pressing
Modern peanut oil press mainly uses two processes:
| Craft type | Oil yield | Features |
|---|---|---|
| Pressing method | 40-45% | Traditional craftsmanship, rich oil flavor |
| Leaching method | 48-52% | Modern craftsmanship, high oil yield |
The pressing method extrudes the grease by physical pressure, while the leaching method uses organic solvents to dissolve the grease. Recently, popular topics show that consumers are increasingly paying attention to cold-pressed peanut oil because it retains more nutrients.
4. Nutritional value of peanut oil
According to recent nutritional research, the main nutrients of peanut oil are as follows:
| Nutritional ingredients | Content (per 100g) | Health benefits |
|---|---|---|
| Unsaturated fatty acids | 80-85g | Reduce the risk of cardiovascular disease |
| Vitamin E | 15-20mg | Antioxidant |
| Phytosterol | 200-400mg | Lower cholesterol |
5. Recent hot spots related to peanut oil
1.Peanut oil prices rise: Affected by the international oil market, domestic peanut oil prices rose by about 5% compared with last month.
2.Organic peanut oil is sought after: Consumers' health awareness has improved, and sales of organic certified peanut oil increased by 30% year-on-year.
3.Small oil pressing workshops emerge: Consumers who pursue fresh and fresh squeeze drive the growth of small oil press business, and related topics continue to rise on social media.
4.Implementation of the new national standard for peanut oil: The new version of the national standard for "Peanut Oil" in 2023 has been officially implemented, putting higher requirements on product quality.
6. Conclusion
The reason why peanuts can squeeze oil is due to its high fat content, special cellular structure and the advancement of modern oil extraction technology. As a nutritious cooking oil, peanut oil continues to be popular in the market. As consumers' attention to healthy diet increases, the peanut oil industry is also constantly upgrading and developing. Knowing this knowledge can help us better choose and consume peanut oil.
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