A study on the preparation of greases from recycling of used lubricating oil

Abstract

Greases were made by combining a fluid lubricant and a thickener. In this research, the grease was synthesized from thickener materials such as NaOH, and peanut oil (PO), which dispersed in recycled lubricating oil (RLO) in the laboratory. The result shows that the suitable ratio of NaOH/PO/RLO was 3,7/13/18; the achieved time and temperature for synthesizing grease were about 55 minutes and 105 -110^oC, respectively. It was demonstrated that the optimal grease dropping point and the needle penetration were 116^oC and 176 mm, respectively.