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What are the differences in the rapeseed oil produced by the three types of oil equipment: leaching, pressing and refining?

September 07, 2021

The commonly used rapeseed oil production equipment includes three types of rapeseed oil pressing equipment, rapeseed oil extraction equipment, and rapeseed oil refining equipment. How do these types of equipment produce rapeseed oil and what are the differences in the rapeseed oil they produce? Zhongxing Machinery will give you a brief introduction:

oil press equipment

  The oil press equipment is also the oil press to press oil. This oil press method is the most familiar to everyone. The oil press uses mechanical external force to squeeze the pretreated rapeseed, and squeeze the oil from the rapeseed to obtain pressed rapeseed oil. The rapeseed oil produced by the squeezing equipment does not contain additives, and the nutrient retention is relatively complete, but the residual oil rate in the cake after the squeezing equipment is high, and single use will cause oil waste. Therefore, when producing rapeseed oil, oil plants often use pre-expression extraction methods to increase the oil yield of rapeseed oil, which requires rapeseed oil extraction equipment.

   rapeseed oil leaching equipment to make oil is to use a solvent to fully contact the oil, extract the oil in the rapeseed oil to obtain a mixed oil, and then use the solvent and the oil to have a different boiling point, and evaporate the solvent to obtain the leached rapeseed oil. The leaching efficiency of rapeseed oil produced by the leaching equipment is high, but the crude oil leached by the leaching equipment contains a small amount of solvent residues. The leached crude oil must be refined before it can be eaten. Edible fats and oils are safe. The leached meal is of good quality and can be used for livestock or animal feed with high product utilization.

There are certain impurities in squeezed oil and leached oil. Some impurities are brought in during production, such as sediment, meal powder, plant fiber and other impurities, and some are contained in oils such as phospholipids, free fatty acids, pigments, etc. Impurities that affect the quality of rapeseed oil. Therefore, whether it is squeezing or leaching oil, refining equipment is required to remove impurities in the oil.

   rapeseed oil refining equipment removes impurities in rapeseed oil purposefully through degumming, deacidification, dehydration, decolorization, deodorization and other processes to ensure the quality and edible safety of rapeseed oil. The refined rapeseed oil is more suitable for the taste of the general public and can also extend the storage time of the rapeseed oil. Refined rapeseed oil can only enter the market after passing the inspection.

   Generally speaking, rapeseed oil squeezing equipment and rapeseed oil extraction equipment mainly extract oil from the oil. This oil is called crude oil and needs to be reprocessed. Rapeseed oil refining equipment refines the extracted crude oil to remove impurities and harmful elements in the fat. The refined oil is the finished edible rapeseed oil we usually see in supermarkets.