Fully Refined Vegetable Oil

While producing raw, semi-refined and fully refined oil for food purposes, Altınyağ also has the equipment and units necessary for packaged oil production for residential use.  With a capacity to meet the future contract manufacturing demands from the Middle East region, particularly Iraq, for fully refined packaged vegetable oil, Altınyağ offers a wide range of products and services.

The semi-processed oil, which is also produced in-house or outsourced depending on specific customer needs, pass through treatment processes by Altınyağ to make it suitable for food consumption, thus producing fully refined vegetable oil. 

Altınyağ’s refinement process removes the oil from acid content, waxy substances and phospholipids, besides giving it a satisfactory flavor.  The fully refined vegetable oil produced by Altınyağ can be presented directly to the market from the factories, the customers of Altınyağ for such production.  With 250 tons of fully refined vegetable oil production capacity, Altınyağ operates in Turkish as well as the Middle Eastern markets in this business.  

It is achieved by refining raw oil.  Refinement process comprises of the following four steps:

1-   Neutralization

During the ripening and storage periods of seeds and the production of raw oil, the free fat acid compounds increase due to various reasons.  The acid level must be reduced to a level complying with the standards for the oil to be consumable.  Neutralization allows neutralizing the oil acids, dumps, residuals and undesired substances in raw oil.  The separators in the facility carry out this process continuously.  This first phase achieves the desired quality in terms of free fatty acid level in the neutral oil.  The undesired substances in the oil including gum, acid and residuals are combined with phosphoric and caustic acid, producing the ‘soap-stock’, the raw material for soap.

The flocks in the oil are separated from the oil by the separator due to variation of density.  To remove the remaining soap in the oil, it is mixed with soft water and washed by the washing separator.  The oil from the washing separator is dried under the drying vacuum.  The dried oil is sent to the whitening phase, during which samples are taken regularly to check the amount of free fatty acid (FFA) and soap.  

2-   Bleaching

The most common natural chromogens are chlorophyll substances in vegetable oils.  The oil produced from seeds that were stored improperly contains compounds formed as a result of oxidative reactions, in addition to natural chromogens, which makes the bleaching of oil more difficult.

The bleaching process ensures soil liquid adsorption.  The phospholipids, oxidation products, trace metals and residual soap in the neutralized oil is captured by the absorbents.  Following the neutralization, the oil is mixed with the bleaching soil.  The remaining chromogens, heavy metals and oxidation products in the neutral oil are filtered from the oil by the bleaching soil.

3-   Winterization

After being cleared of impurities in the neutralization and bleaching processes, the oil contains compounds that tend to precipitate under low temperature.  Depending on its type, the oil contains waxes, stearines and saturated glyceride with high melting point.  Winterization process enables elimination of such substances.

4-   Deodorization

Volatile substances in the oil that cause undesirable odor and taste (aldehyde and ketone, free fatty acids, oxidative products) are broken down with high temperature and removed from the oil by vacuuming with dry vapor.  

Fully refined oil types:

  • Fully refined linseed oil
  • Fully refined camelina oil
  • Fully refined canola oil
  • Fully refined sunflower oil
  • Fully refined soy oil
  • Fully refined corn oil
  • Fully refined safflower oil