LOW-SULFUR FUEL FOR DIESEL ENGINES Russian patent published in 2001 - IPC

FIELD: liquid fuels. SUBSTANCE: invention, in particular, relates to diesel fuels with sulfur level at least 500 ppm containing, as basic part, at least one middle fraction of primary crude oil straight-run distillation product with boiling range 150- 400 C supplemented by lubrication agent containing monocarboxylic and polycarboxylic acids. More particularly, fuel contains at least 200 ppm of additive consisting of at least one saturated or unsaturated aliphatic monocarboxylic acid wherein linear hydrocarbon chain comprising 12 to 24 carbon atoms and at least one polycyclic hydrocarbon compound comprising at least two 5- or 6-membered cycles including no more than one heteroatom such as nitrogen or oxygen, the two cycles having at least two common, preferably vicinal, carbon atoms and being saturated or unsaturated, unsubstituted or substituted by at least one substituent selected from carbocyclic, aminocarboxylic, ester, or nitrile groups. When indicated combination represents tall oil, fuel contains more than 60 ppm additive. EFFECT: improved lubricating property. 11 cl, 4 tbl