CYCLIC QUATERNARY AMMONIUM SALTS AS ADDITIVES TO FUEL OR LUBRICANTS Russian patent published in 2020 - IPC C07D207/04 C07D295/04 C07D231/10 C10L1/232 C10L10/18 C10M133/38 

FIELD: fuel industry.

SUBSTANCE: invention relates to a method of producing a diesel fuel composition, comprising obtaining a quaternary ammonium compound by reacting (a) a cyclic tertiary amine, containing less than 19 carbon atoms, which is an N-alkyl-heterocycle selected from pyrrolidine, piperidine, morpholine, piperazine, pyrrole, imidazole and dihydropyrrol, with (b) epoxide, selected from ethylene oxide, propylene oxide, butylene oxide, pentylene oxide, hexylene oxide, heptylene oxide and glycidyl ethers, in the presence of (c) carboxylic acid of formula R⁵COOH, where R⁵ is CHR¹¹CHR¹²COOR¹³, where one of R¹¹ and R¹² is hydrogen and the other is a polyisobutenyl group or an optionally substituted alkyl or alkenyl group, having 6 to 50 carbon atoms, and R¹³ is hydrogen or an optionally substituted alkyl group; and mixing quaternary ammonium compound with fuel.

EFFECT: technical result is obtaining a new composition which improves operational characteristics of a diesel engine.

14 cl, 2 tbl, 8 ex