QUATERNARY AMMONIUM COMPOUND AND FUEL COMPOSITION Russian patent published in 2023 - IPC C10L1/222 C10L10/04 C10L10/06 C10M129/72 C10M129/95 C10M133/04 C10M133/08 C10M133/54 

FIELD: diesel fuel.

SUBSTANCE: present invention is related to a method for the preparation, composition and use of quaternary ammonium compounds as additives for diesel fuel compositions that are used to operate diesel engines with high pressure fuel systems. A method for producing a quaternary ammonium compound having formula (I) involves reacting a tertiary amine having formula R¹R²R³N with an epoxide in the presence of a compound having formula (IIB)

where X represents CH₂CHR or CRHCH₂, R represents an alkyl or alkenyl group containing from 6 to 36 carbon atoms; R⁴ represents an unsubstituted alkylene group having from 1 to 12 carbon atoms; n is from 1 to 20; c is at least 1; W represents O^- or OH; b is equal to 1 if W is OH and b is equal to 2 if W is O^-; and wherein each of R¹ and R² independently represents an alkyl group containing from 1 to 12 carbon atoms; and R³ is selected from an alkyl group containing from 1 to 24 carbon atoms, or benzyl, or a hydroxyalkyl or hydroxyalkoxyalkyl group containing from 2 to 20 carbon atoms; and R⁰ represents a group having the formula

where each of R⁹, R¹⁰, R¹¹ represent hydrogen and R¹² represents hydrogen, phenyl, an alkyl group containing from 1 to 50 carbon atoms, CH₂OR¹³ or CH₂OCOR¹⁴, R¹³ represents an alkyl or aryl group containing from 1 to 30 carbon atoms, and R¹⁴ represents an alkyl or aryl group containing from 1 to 30 carbon atoms.

EFFECT: provision of a method, a composition and their application that make it possible to improve the performance characteristics of a diesel engine, in particular, including a high-pressure fuel system, to prevent or reduce the intensity of the formation of internal deposits in diesel engine injectors (IDDI), to reduce or remove existing IDDI, to provide control of external deposits on the injector and/or deposits on the fuel filter.

17 cl, 3 dwg, 10 tbl, 6 ex