1,2-Disubstituted imidazolines with heterocyclic fragments as antimicrobial additives for jet fuels

Abstract

The most promising and convenient method for protecting hydrocarbon fuels against damage by microorganisms is the use of antimicrobial additives that are effective for extended periods in the storage and transportation of fuels. Imidazoline derivatives manifest high biocidal activities in petroleum distillate fuels, with the activity depending considerably on the nature and structure of the radicals linked to the imidazoline ring. One example of a highly effective additive is AID 9-12, the basic components of which are 1,2-disubstituted imidazolines obtained by the condensation of polyethylenepolyamines with an n-C{sub 9} - C{sub 12} fraction of synthetic fatty acids. At low concentrations in jet fuels, this additive exhibits high activities against microbial damage without having any adverse effects on the physicochemical or service properties of the fuels. Also effective as antimicrobial additives for jet fuels are imidazolines with sterically hindered phenol fragments or with naphthyl or benzyl radicals. In our search for effective antimicrobial additives, we have investigated a series of 1,2-disubstituted imidazolines with heterocyclic fragments. In this paper, we report the results of our investigation.