Abstract
It’s known that hydropurification process of diesel fuels leads to elimination of sulfur-, nitrogen- and oxygen-containing compounds in their composition and causes in a violation of chemical stability, compensated by the use of additives. Heteroatom-containing phenol and alkylphenol-formaldehyde oligomers are widely studied as effective multifunctional additives for fuels and oils. Imidazolinamine- modified oxyethylated nonylphenol-formaldehyde oligomers were studied as multifunctional diesel fuel additives. It was established that addition of imidazolinamine-modified oxyethylated nonylphenol- formaldehyde oligomers to hydropurified diesel fuel causes a decrease in the amount of sediment formed from 2.5 to 0.2 mg/100 ml of product; freezing point also decreases from -10 to -18C. It was proved that the use of synthesized additives in hydropurified diesel fuel improves some of its performance properties.