Hydrofinishing – purification step for particularly high-quality base oils
Hydrofinishing is a refining step in which crude oil derivatives or pre-purified base oils are treated with hydrogen under high pressure. The aim is to remove unwanted compounds such as sulphur, nitrogen, oxygen, colorants and unstable aromatic molecules from the oil without changing the basic structure of the molecule.
How does hydrofinishing improve the quality of lubricating oils?
Hydrofinishing is the finishing touch in oil processing, so to speak. It ensures that base oils are clear, color-stable and oxidation-resistant – ideal prerequisites for further processing into high-quality engine oils, gear oils and industrial lubricants.
While hydrocracking penetrates deep into the molecular structure, hydrofinishing gives the oil the final quality boost. BASINOL relies on this technology to guarantee the consistent purity and long-term stability of its lubricants – even under extreme operating conditions.
What exactly happens during the hydrofinishing process?
In hydrofinishing, the base oil is passed through a catalyst in a reactor at temperatures of approx. 200-300 °C and under hydrogen pressure. This removes impurities such as sulphur compounds, nitrogen and unwanted color carriers. Unlike hydrocracking, the molecular structure of the oil is largely retained – but the chemical stability is significantly improved.
Is hydrofinishing only suitable for base oils?
No – hydrofinishing is also used to improve other refined products such as heating oil, diesel or even wax products. However, it is particularly valuable in lubricant production as it gives base oils a consistent quality and longer storage stability. This is crucial for products that are used under fluctuating temperatures or for long storage periods.
How does hydrofinishing differ from hydrocracking?
The difference lies in the degree of intervention:
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