HYDROCARBON-BASE FUEL COMPRISING ADDITIVE IMPROVING LOW- TEMPERATURE PROPERTY Russian patent published in 2005 - IPC

FIELD: organic chemistry, fuels.

SUBSTANCE: invention elates to the development of new mixture of polyfunctional additives improving possibility for using middle distillates at low temperatures. Polyfunctional additive consists of copolymers of at least one dicarboxylic compound and at least one olefin on which nitrogen-containing and/or ester functional groups are grafted of the general formula:

wherein R₁ and R₂ are similar or different and they mean hydrogen atom or alkyl radicals comprising from 1 to 20 carbon atoms, and R₃ is taken among alkyl groups comprising from 12 to 30 carbon atoms when R₆ represents hydrogen atom, and vice versa; R₄ and R₅ are similar or different and mean hydrogen atom or alkyl radical comprising from 1 to 22 carbon atoms; n and m mean whole numbers changing in the range from 1 to 50; X is taken among amine salts and N-alkylpolyalkylenepolyamines and their mono- and polyhydroxylated derivatives, alkyl esters and N-alkylpolyalkylenepolyamine esters, and alkylamines and N-alkylpolyalkylenepolyamines. Addition provides reducing and maintaining maximal working temperature below -20°C and to increase cetane rating of distillates without precipitation of paraffins in middle distillates.

EFFECT: valuable properties of fuel.

15 cl, 6 tbl, 4 ex