DETERGENT AND ANTICORROSIVE FUEL ADDITIVE AND FUEL WITH THIS ADDITIVE Russian patent published in 2001 - IPC

FIELD: liquid fuels. SUBSTANCE: invention provides bifunctional additive with detergent and anticorrosive functions, which when added to fuel considerably moderate problems associated with corrosion of some parts of engine and formation of deposits. Additive for motor car fuels, in particular gasoil-type fuels, includes amide or imide groups. It is prepared by mixing compound A (60-90 wt %), which consists of at least one polyalkylene carboxylic compound in the form of dibasic acid or its anhydride with average molecule weight between 200 and 3000 and compound B (0.1-10 wt %), which consists of at least one monobasic carboxylic compound or its anhydride containing 1 to 6 carbon atoms in hydrocarbon chain, and compound C (10-30 wt %), which consists of at least one primary polyamine depicted by general formula H₂N-[-(CHR1-(CH₂)_p-CHR₂)_n-NH]_m-H, A/B/C weight ratio being 1:(0.1-1): (1-3) and never 1:1:1. EFFECT: enhanced detergent and anticorrosive efficiency and reduced emission of polluting substances and smoke. 7 cl, 8 tbl, 4 ex