Crude SOYBEAN oil is obtained from SOYBEAN seeds which go through the preparatory steps before undergoing the solvent extraction process in soya oil refinery plant.

The crude SOYBEAN oil is further refined for making it free from fatty acids, color pigments, and numerous other components harmful to human beings.

Refining Process of Soybean Oil

As stated above, solvent-extracted SOYBEAN oil undergoes a refining process in the SOYBEAN oil refining plant.

The soybean oil extraction process is conducted in four steps which are listed as well as explained below


Crude soybean oil contains a relatively high concentration of phospholipids compared with other vegetable oils.

Crude soybean oil contains a relatively high concentration of phospholipids compared with other vegetable oils. Degumming is a process of removing these components from crude soybean oil to improve its physical stability and facilitate further refining at the soyabean oil plant. In this process, oil is treated with water to precipitate the hydratable phosphorous which is removed through the centrifugal separation system, and obtained gums are dried to make lecithin which is used in many applications in the food industry.

Gums Conditioning and Neutralization

This process is accomplished in several steps which are listed below, one by one

  • Degummed oil received is treated with phosphoric acid in a suitable retention tank to convert non-hydratable phosphorus into hydratable form
  • After the completion of the above process acid mixed oil is treated with caustic soda lye in another retention vessel to neutralize the fatty acids and phosphoric acid as well.
  • Once retention time is completed, oil and soap are separated in the centrifugal separator.
  • Neutralized and soap-separated oil was further treated with hot water to remove the traces of soap which was not fully separated in the previous process.
  • Neutralized oil is first heated and treated with 10-15% hot water in a dynamic mixer and sent into a centrifugal separator to separate the soap-mixed water from the oil.
  • Washed oil is dried in a vacuum drier at 80 m bar pressure in which water is sucked by vacuum and clear oil is transferred into a Neutral oil storage tank.
  • Finally, the washed oil is transferred to the neutral oil storage tank after drying it through a vacuum.


The next process after degumming is known as bleaching, which is conducted for removing the contaminants such as

color pigments, polycyclic aromatic compounds, dirt, traces of metals, phospholipids, and several other impurities. Further, the process of bleaching also involves multiple steps.

Continuous Deodorization

The last step of soybean Seed extraction plant is deodorization which is a physical process conducted for removing numerous volatile components.

It is a vacuum stripping process that makes use of a stripping agent. Just like the above-listed process, this process is also conducted in steps. All the steps are listed and explained below –

  • De-aeration - this process is conducted in Deaerator at a standard temperature under a high vacuum. At first, the oil is charged, and sparge steam is used for the removal of air traces which are further sucked through a vacuum.
  • Heating - the process of heating is conducted in a heater that is specially designed for functioning under very low pressure.
  • Striping - this process is carried out at a high temperature for the removal of odoriferous compounds as well as fatty acids from the oil via stripping steam.
  • Cooling - in this step the temperature of the oil is reduced by the heat exchange with feed oil and followed by clean water through specially designed heat exchangers.

Further, the temperature of the oil is brought to the required level and the required quantity of anti-oxidant dosing is added to the oil after which the oil is transferred to the storage tank through a polishing filter.

Advantages of Mectech Soya Refining Oil Plant

Today, Mectech is a leading Soybean Oil Extraction Plant manufacturer or Soybean Oil Plant manufacturer in India and abroad with its latest techniques and energy efficient plants. Being one of the leading soya solvent extraction plant suppliers, we have supplied more than 350 plants in different parts of the world on turnkey basis. We believe in moving with time thus keep up with the technical advancements in edible oil refining industry.

Soybean Oil Refining Multiple Advantages:

  • Mectech’s neutralization process is highly efficient, neutralization of fatty acid is accomplished with minimal saponification and the phosphorous content in neutral oil is also very low.
  • The caustic lye mixer provides outstanding contact amid oil and caustic lye. This ensures the low consumption of caustic lye in the entire neutralization process.
  • In addition, the variable residence time provided by the caustic and oil retention tank ensures the minimum loss of neutral oil.
  • The bleacher designed by Mectech is highly efficient as they do not require any mechanical agitation as well as accomplish the process of bleaching under optimum moisture for achieving perfect results.
  • In addition, our highly efficient bleachers also consume low-bleaching earth and also save the power consumed for running the process.
  • Apart from bleachers, our oil to oil heat exchanger which is an eminent part of deodorizer is also uniquely designed for the consumption of minimum heat energy.
  • The fatty acid scrubbing recovery system in deodorizer has an efficient and elaborate design which ensures that virtually there is no carry-over of the fatty acid in the barometric condenser.
  • Heating coil is also very efficiently designed with the aim of preventing charring of oil.

Soybean oil is a widely used vegetable oil that is extracted from soybean seeds. It is a healthy oil that is rich in essential fatty acids and antioxidants. The soya oil refinery plant involves several steps, including soybean seed extraction, refining, and packaging.

In this article, we will discuss the benefits of setting up a soybean oil refinery plant

Soybean Extraction Plant for Seed:

The soybean seed extraction plant is the first step in the soybean oil extraction process. It involves cleaning and crushing the soybean seeds to extract the oil. By setting up a soybean seed extraction plant, you can ensure a steady supply of raw materials for your refinery plant.

High-Quality Oil:

The soybean oil extraction process involves refining the crude oil to remove impurities and improve its quality. By setting up a soybean oil refinery plant, you can produce high-quality oil that meets international standards. This will help you attract customers who demand high-quality oil for their cooking and other needs.

Diverse Product Range:

A soybean oil refinery plant can produce a wide range of products, including cooking oil, industrial oil, and biodiesel. By diversifying your product range, you can cater to different customer needs and tap into different markets. This will help you increase your revenue and profitability.


Setting up a soybean oil refinery plant can be a cost-effective investment in the long run. By producing your own oil, you can save on the cost of purchasing oil from suppliers. Additionally, you can sell the by-products of the soybean seed extraction process, such as soybean meal and soybean hulls, for additional revenue.

Setting up a soybean oil refinery plant has numerous benefits, including a steady supply of raw materials, high-quality oil production, a diverse product range, and cost-effectiveness. If you are looking to enter the soybean oil industry, investing in a refinery plant can be a wise decision.


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