Dewaxing of oil is a process of eliminating higher melting point constituents like waxes or triglycerides from oil by gradually cooling vegetable oils and separating saturated glycerides from the oil.

Normally dewaxing process in refinery is carried out at higher temperatures (18-20 °C) to avoid the crystallization of saturated triglycerides & amalgamation of waxes & saturated triglycerides.


Waxes & Saturated triglycerides which are fairly visible at low temperatures are removed in winterization process to keep the appearance of oil clean transform Degummed, Bleached & Dewaxed oil is cooled and filtered to achieve the quality.

Continuous Dewaxing

Benefits of the Dewaxing Process

This process involves removing waxes and other impurities from crude oil or petroleum products to enhance their properties.

Here are some advantages of the dewaxing or winterization process in the refinery:
Improves flow properties

Dewaxing enhances the fluidity of petroleum products, especially in cold weather conditions, by reducing the cloud point and pour point.

Enhances product quality

The removal of waxes and other impurities improves the stability, lubricity, and overall performance of the final product.

Increases profitability

Dewaxing in rice bran oil extraction process enables refineries to produce high-quality products that can command a premium price in the market, thereby increasing profitability.

Reduces equipment wear and tear

The removal of waxes reduces equipment wear and tear, thereby increasing the lifespan of machinery.

Overall, the dewaxing process in refinery is a cost-effective way to improve the quality of petroleum products and increase profitability. Its benefits make it an essential step in the production of high-quality diesel, base oils, and lubricants.

The Dewaxing Process
Here are some essential steps to consider during the dewaxing or winterization process:
Degumming and Neutralization

The first step is to remove impurities such as phospholipids, metals, and free fatty acids.


The oil is cooled to a temperature of around 10-15°C, allowing for the formation of wax crystals.


The oil is passed through a filter to remove the wax crystals.


The oil is heated back to its original temperature to ensure that the process does not affect its overall quality.

Overall, the dewaxing for RBO is a critical step in producing high-quality vegetable oils. The process ensures that the oils remain liquid at low temperatures and can be used in various food applications.


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