Groundnut oil has attained the status of the cooking medium of choice due to its embedded health benefits.

Apart from its alluring strong aroma and universally liked peanut flavor, the all-purpose cooking oil brings multiple health benefits to the table. By being an active agent in lowering cholesterol, especially bad cholesterol, it is being accepted gleefully across the globe. The benefits include a low content of saturated fat that is naturally free from cholesterol and trans fat. It is further blessed with high unsaturated fat while being a good source of phytosterols and vitamin E. With an assured market and greater possibility of returns, setting up a groundnut oil manufacturing plant for Groundnut oil refining today makes eminent sense for the demand for groundnut oil extraction machine.

Crude Groundnut Oil Composition

Particulars Parameters
Free Fatty Acid (as oleic acid) 1 - 2%
Iodine Value 86 - 107
Saponification Value 187- 196
Unsaponifiable Matters 0.4% apx.
Titer 26 — 32°C
Smoke Point 226°c apx.
Specific Gravity @ 20°c 0.912— 0.92

Fatty Acid Composition

Methodology of Refining

Groundnut oil is usually refined by the alkali neutralization process.

For alkali refining following processing step takes place:

Alkali Refining Process

The crude oil is neutralized as a first process, that primarily involves the treatment of crude oil with an alkali. Soap separation follows in order to remove soap from the oil. Hot water is subsequently employed to wash the soap-separated oil to remove the soap traces from the oil followed by a drying process to evaporate the moisture of the oil.

Gums conditioning & Neutralization

Groundnut oil is first treated with citric acid and followed by caustic soda lye to neutralize the fatty acids and condition of phospholipids. The neutralization reaction produced the sodium salt of fatty acids which was removed through the centrifugal separator and clean oil washed with hot water to remove the traces of soap.


Neutralized oil was treated with hot water and separated through the centrifugal separator to remove the traces of soap from the neutral oil.


Removal of moisture under vacuum.


“Bleaching” is a process of selective removal of pigments and impurities by the physical and chemical interaction of an adsorbent with an oil or fat to improve its quality.

This process refers to the art of removing :

  • Colour pigments
  • Dirt, Trace metals
  • Removal of polycyclic Aromatic compounds
  • Phospholipids

Mectech provides a wet bleaching process in its Groundnut Oil Processing Plant which has shown better results with a lesser amount of bleaching clay.


Deodorization of Groundnut oil is a vacuum stripping process in which a given amount of stripping steam is passed for a given period of time through hot oil at a low pressure which removes various volatile components and fatty acids to increase the self-life and maintained good odor-free test of the product.

Deodorization is a Multi-Step Process Comprising :

  • Deaeration
  • Heating
  • Deodorization cum De-acidification
  • Cooling

Mectech Advantage

Mectech is a leading Groundnut Oil Extraction Machine manufacturer in India and abroad. We provide advanced and efficient Groundnut Oil Refining Machines/ Groundnut Oil Processing Plant in India & abroad.
  • Most most efficiently designed oil-to-oil heat exchanger fitted in the last tray of the Deodorizer ensures minimum heat energy requirement.
  • The elaborate and efficient design of the fatty acid scrubbing recovery system ensures virtually no carry-over of fatty acid into the barometric condenser.
  • The most efficiently designed heating coil prevents to charring of oil during the process.

A groundnut oil refinery plant is an essential unit that helps to purify crude groundnut oil, making it safe and suitable for human consumption. The process involves using advanced groundnut oil extraction machines to extract oil from the seeds and then refining it through various stages.

Here are some of the benefits of setting up a groundnut oil refinery plant:

High-quality oil

The groundnut oil process used in a refinery plant ensures that the oil is of high quality and free from impurities. The extraction machines used ensure maximum yield and minimum waste, resulting in pure and healthy oil.

Longer shelf life

Refining groundnut oil extends its shelf life, making it more stable and resistant to oxidation. A high-quality groundnut oil extraction machine enhances the oil's overall quality, making it ideal for long-term storage.

Increased profitability

Setting up a groundnut oil refinery plant for the groundnut oil process can be a lucrative business venture. The high-quality oil produced attracts a premium price, and the efficient extraction machines used in the process reduce production costs, increasing overall profitability.

Health benefits

Refined groundnut oil is a rich source of healthy fats, vitamins, and antioxidants. These nutrients have various health benefits, including reducing inflammation, improving heart health, and supporting brain function.

A groundnut oil refinery plant is an excellent investment opportunity with numerous benefits. The use of advanced groundnut oil extraction machines and the refining process guarantees high-quality, versatile, and healthy oil that can improve profitability and offer various health benefits.


    We provide best in class engineering services for your plant


    We provide best in class engineering services for your plant


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