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.
