Preparation, characterization and evaluation of some metallic lube oil additives

Abstract

All mechanical equipment suffers from wear due to the time of use and exposure to contaminants that can damage its movable parts. One way to extend the life time of this equipment is through the use of suitable lubricating oil with different additives. Detergents, especially basic detergents, contain reserve base that will neutralize the acids to form salts. While this decreases the corrosive tendency of the acids formed at high temperatures. Dispersants also disperse sludge formed in engine operated at low temperature. In the present work, different metallic detergent/dispersant additives will be prepared via reaction of dodecyl phenol with calcium hydroxide in different ratios and different amounts of sulfur. The structures of the prepared compounds were confirmed by Fourier transform infrared spectroscopy (FTIR), Proton Nuclear Magnetic Resonance (H 1 - NMR) and molecular weight is determined. All the prepared compounds were found to be soluble in lubricating oil. The efficiency of the prepared compounds as antioxidant and detergent/dispersant additives for lubricating oil was investigated. It was found that the additives have excellent power of dispersion and detergency and the efficiency as antioxidant increases by increasing the sulfur content up to 1.5% and increases by increasing the percentage of metal in the additives.