Different extraction methods of cooking oil: pressing and solvent extraction

Cooking oil is an cooking oil made from the byproduct of seed processing. It is rich in a variety of nutrients such as vitamin E and unsaturated fatty acids, which have many benefits for human health. There are two extraction methods of cooking oil: cooking oil pressing method and cooking oil solvent extraction method. These extraction methods of cooking oil aim to extract the oil from oil seeds, but their cost and oil yield are different.

Small-scale cooking oil pressing method

The cooking oil pressing method is a physical squeezing method suitable for small-scale production. Before extracting cooking oil, the raw material needs to be pre-treated to ensure optimal moisture and temperature, which can increase the oil yield. Pretreatment includes cleaning, drying, and other steps to effectively remove impurities and moisture from the raw material, thereby increasing the oil extraction rate. In small-scale production, a cooking oil press machine can be used for physical squeezing to obtain the oil. The cooking oil press machine is a simple mechanical device that can squeeze the oil from the raw material. The use of this machine does not require too much technical knowledge, only following the instructions. In addition, the maintenance of the cooking oil press machine is straightforward, requiring only regular cleaning and maintenance. Therefore, the cooking oil press machine is a very suitable device for small-scale production, which can convert cooking into useful cooking oil and increase income.

Cooking oil press machine photo

Large-scale cooking oil solvent extraction method

Large-scale cooking oil solvent extraction method is another method for extracting cooking oil, which is recommended for obtaining oil. The cooking oil solvent extraction method is a chemical method that uses a chemical solvent to extract oil from the raw material. Compared with the cooking oil pressing method, the cooking oil solvent extraction method has a higher oil yield but also higher cost. In addition, the cooking oil solvent extraction method requires the use of chemical solvents, which have some impact on the environment, so environmental protection issues need to be considered. Therefore, when using the cooking oil solvent extraction method, it is necessary to choose environmentally friendly and safe chemical solvents, strictly control the amount used and emissions, and reduce the impact on the environment.

Cooking oil solvent extraction machine photo

The process of cooking oil solvent extraction method includes solvent extraction, mixed oil steam distillation, wet meal decolonizing, and solvent condensation and recovery. In the cooking oil solvent extraction method section, a chemical solvent is used to remove oil from the raw material. In the mixed oil steam distillation section, the solvent is removed from the mixture by controlling the temperature and pressure. In the wet meal decolonizing section, the solvent is extracted from the filter cake. In the solvent condensation recovery section, the gaseous solvent is condensed into liquid for recovery. The entire technological process needs to strictly control the parameters of each link to ensure that the extracted oil is of high quality and meets cooking standards. Although the cost of cooking oil solvent extraction method is higher, it is suitable for large-scale production.

The refining process method of cooking oil

Regardless of whether it is the cooking oil pressing method or the cooking oil solvent extraction method, the obtained crude oil needs to be refined before use. Refining is the process of removing impurities and undesirable components from crude oil to make it meet cooking standards. The refining method includes deacidification, deodorization, decolorization, and other steps. After refining, cooking oil is purer, has a milder taste, and is more suitable for people’s tastes. (Recommend reading: 1-10TPD batch edible oil refinery plant working flow 3D video)

Cooking oil refining machine photo

The above is an introduction to two extraction methods of cooking oil. If you want to learn more about cooking oil extraction methods or how to choose equipment for extracting cooking oil, please contact us. As a professional manufacturer of cooking oil extraction equipment, Glory Oiltech will provide customized services according to your requirements.