Optimisation d'une formulation d'un lubrifiant bio--sourcee

Abstract

Abstract Frying oil contains an important substance: triglycerides. The latter can be transformed by chemical methods into value-added compounds while respecting the concept of green chemistry and the circular economy. This valorisation is carried out through a double transesterification process. The first transforms frying oil into biodiesel while the second transforms biodiesel into biolubricant. The objective of this work is to valorise waste that is harmful to the environment and to produce a biolubricant intended to replace petroleum-based lubricants. The second transesterification made it possible to transform the biodiesel into a biolubricant using 1-octanol and potassium hydroxide as a catalyst and an intensification of the synthesis by microwave, a yield of 88.10% was reached. The properties of the biolubricant were kinematic viscosities of 5.84 mm2/s and 2.43 mm2/s at 40°C and 100°C respectively, a flash point of -4°C and a flash point of 108°C . Very precise characteristics meeting ISOVG and SAE monograde biolubricant standards have been optimised by a mixing plan.