Fuel composition containing a hydrocarbyl-substituted succinimide

摘要

The present disclosure is directed to a middle distillate fuel composition comprising a friction modifying effective amount of a hydrocarbyl-substituted succinimide derived from maleic anhydride, polyisobutylene and ammonia; and a middle distillate fuel. A method for modifying friction in a compression engine comprising providing to the engine the disclosed fuel composition is also disclosed. Moreover, there is disclosed a method for improving fuel mileage.

主权项

1. A low-sulfur middle distillate fuel composition comprising:
from about 50 to about 150 ppm of a hydrocarbyl-substituted succinimide comprising the product of contacting a hydrocarbyl-substituted succinic anhydride and ammonia; and an ultra low-sulfur fuel composition comprising less than 15 ppm sulfur, wherein the hydrocarbyl-substituted succinic anhydride is the product of contacting an olefinic unsaturated hydrocarbon with maleic anhydride, wherein the olefinic unsaturated hydrocarbon has isomerized alpha olefins and a number average molecular weight ranging from about 100 to about 300 as determined by gel permeation chromatography, the olefinic unsaturated hydrocarbon comprising predominantly C16 olefins, and wherein the low-sulfur middle distillate fuel composition comprises a sufficient amount of the hydrocarbyl-substituted succinimide to achieve a wear scar having a reduced diameter in a ASTM D6079 HFRR rig test compared to a diameter of a wear scar obtained using the low-sulfur fuel without the hydrocarbyl-substituted succinimide.