Rapeseed oil processing mechanical pressing method

Rapeseed oil processing pressing mechanical method

In this regard, driven by modern technical skills, the extraction and processing of rapeseed oil has been greatly improved, which can be divided into pressing method, solvent leaching method, supercritical fluid extraction technology, microwave-assisted extraction method, water enzymatic method, etc. , the most commonly used are mechanical pressing and solvent leaching.

The mechanical pressing method uses mechanical pressure to directly separate the oil from the oil. No solvent is added to the oil during the production process. The oil is processed continuously, and the oil is extracted by physical external force. It can be divided into cold pressing and hot pressing. . The cold pressing method refers to the oil pressing method that directly presses the oil without steaming and frying, and maintains a lower temperature during the whole process. The hot pressing method is to extract oil after the oil crops are processed by high temperature steaming and frying.

Compared with the two oil-making processes, the hot pressing method can better improve the oil yield and add a rich flavor to the oil. With the increase of baking time and temperature, the color of perilla oil deepens and the flavor is more rich and mellow. Improved oxidative stability. However, if the temperature is too high, the properties of the oil will be changed, the stability of the fatty acids in the oil will be destroyed, and the aromatic components will be volatilized in large quantities. Cold pressing can retain the flavor of the oil to a greater extent without affecting the retention of nutrients in the oil. Cold pressing and hot pressing have their own advantages and disadvantages, and the actual application can choose the pressing method according to different needs.

Solvent leaching method is to use volatile solvent to extract oil, and use the mutual solubility of oil and solvent to extract oil from solid oil. The edible oil can be reused in the extractor. Compared with pressing, leaching method oil is simple and convenient to operate, and the oil yield is still high. Therefore, leaching method oil is a good choice for many oil plants, but for oil plants that pursue flavor, it is still pressing method oil. more satisfying.