Used Cooking Oil

Given the diversity of characteristics of used cooking oils, ranging from greater or lesser acidity, moisture content, sulfur to the amount of metals and other impurities, it is necessary to proceed with a pre-treatment of the same before the production of biofuels or in its sale to HVO units (Hydrotreated Vegetable Oil).


Biodiesel is renewable energy intended for combustion in diesel engines, and was developed with the aim of improving energy independence from fossil fuels, generating employment and contributing to a reduction in greenhouse gas emissions. It is produced by mixing various raw materials, such as Rapeseed Oil, Soybean Oil, Palm Oil, including the recycling of used cooking oils and animal fats. It is currently the most widely used alternative fuel and, to date, there are no other options on an industrial and commercial scale. Regarding the quality of the fuel, Biodiesel meets the highest technical requirements and guarantees from car manufacturers, it can be used in diesel engines without modification and, in Portugal, it is sold in mixtures with mineral diesel (fossil) that can reach 7 %, and in other countries, such as the United States, they can reach 20% incorporation.

Fat acids

From the transesterification reaction (Biodiesel production) between a vegetable oil or used cooking oil and an alcohol (in this case methanol) in the presence of a catalyst, biodiesel and crude glycerin are obtained. In the glycerin purification process, the formation of fatty acids occurs, which are separated by decantation, being subsequently heated for further steam distillation to release residual methanol. They are marketed for specific applications.

Raw Technical Glycerin

From the transesterification reaction (Biodiesel production) between a vegetable oil and/or used oil or vegetable oil and/or animal fat and an alcohol (in this case methanol) in the presence of a catalyst, biodiesel and technical crude glycerin are obtained , the latter being obtained by physical separation of biodiesel, followed by splitting of soaps, recovery of methanol and subsequent drying. Crude Glycerin can be commercialized for the animal food sector (if it originates solely and exclusively from the production of Biodiesel with virgin oils) or for technical applications (industry, in antifreeze, etc.) so it is a by-product with commercial value.


In 2016, Biovegetal and Iberol decided to centralize all laboratory activity at Iberol.
Currently, the Iberol Laboratory’s main purpose is to support the company’s activities.
Its framework within Iberol’s organizational structure guarantees total hierarchical and functional independence from the Production and Marketing Sectors, allowing for impartiality and impartiality in the services provided both in internal requests and for external customers.
The suitability of its technical resources for the most diverse methodologies and the qualification of its human resources, allow the performance of analyzes and tests on various types of products, namely oilseeds and derivatives, oils and fats of vegetable and animal origin, biodiesel and glycerin.
Regular participation in aptitude tests contributes to the evaluation of the quality of your results and the continuous improvement of your performance.