The oil produced by pressing method does not destroy unsaturated fatty acids such as linoleic acid, and retains the original nutrients (vitamins, minerals, trace elements, etc.). ) the original natural fragrance of oil crops and plants. However, due to high temperature and chemical processing, unsaturated fatty acids such as linoleic acid are destroyed, and nutrients (vitamins, minerals, trace elements, etc. ) It's all ruined and lost.
Leaching method is to extract and dissolve the oil in the oil with organic solvent, and then remove the solvent from the oil by heating and stripping. Extraction is only a physical process, and there is no chemical reaction between oil and solvent. These organic solvents are easy to volatilize because of their low boiling points, and are basically removed in the refining process.
The difference between pressed oil and cold pressed oil
1 has different meanings.
Extrusion is a unit operation to separate liquid phase from liquid-solid two-phase mixture by mechanical compression force. Squeezing technology is mainly used in oil industry and fruit and vegetable juice making. Cold pressing oil-making technology is a kind of oil-making technology. Oil that has not been rolled or steamed at room temperature is directly pressed to 65 degrees Celsius by a low-temperature oil press to obtain oil and cake with the same nutritional value and molecular structure.
2. Different process requirements
The production process of pressing method requires that the raw materials should be carefully selected, and the oil should be crushed, cooked, fried and extruded after removing impurities and stones, so that the oil can be separated from the oil, and it is made by high-tech natural filtration and purification technology. Cold pressing refers to squeezing juice at or below room temperature without heat treatment after raw materials are crushed.