Fuel additive to control deposit formation

Abstract

The present disclosure is directed to a fuel composition comprising a deposit-modifying effective amount of a hydrocarbyl-substituted succinimide; a detergent; and a fuel. A method for reducing deposit formation is also disclosed.

1 . A fuel composition comprising:
 a deposit-modifying effective amount of a hydrocarbyl-substituted succinimide;   a detergent; and   a fuel.   
   
   
       2 . The fuel composition of  claim 1 , wherein the hydrocarbyl-substituted succinimide is the product of contacting a hydrocarbyl-substituted succinic anhydride and ammonia. 
   
   
       3 . The fuel composition of  claim 2 , wherein the hydrocarbyl-substituted succinic anhydride is the product of contacting an olefinic unsaturated hydrocarbon comprising from about 10 to about 24 carbon atoms and maleic anhydride. 
   
   
       4 . The fuel composition of  claim 3 , wherein the olefinic unsaturated hydrocarbon is linear or branched. 
   
   
       5 . The fuel composition of  claim 3 , wherein the olefinic unsaturated hydrocarbon has a number average molecular weight ranging from about 100 to about 600. 
   
   
       6 . The fuel composition of  claim 3 , wherein the olefinic unsaturated hydrocarbon is polyisobutylene. 
   
   
       7 . The fuel composition of  claim 1 , wherein the hydrocarbyl-substituted succinimide is present in an amount ranging from about 1 ppm to about 1000 ppm. 
   
   
       8 . The fuel composition of  claim 1 , wherein the hydrocarbyl-substituted succinimide is present in an amount ranging from about 3 ppm to about 25 ppm. 
   
   
       9 . The fuel composition of  claim 1 , wherein the detergent is selected from the group consisting of Mannich base detergents, polyetheramines, and hydrocarbyl amines. 
   
   
       10 . The fuel composition of  claim 1 , wherein the detergent is present in an amount ranging from about 10 ppm to about 1500 ppm. 
   
   
       11 . The fuel composition of  claim 1 , wherein the detergent is present in an amount ranging from about 100 ppm to about 300 ppm. 
   
   
       12 . The fuel composition of  claim 1 , further comprising a carrier fluid. 
   
   
       13 . The fuel composition of  claim 1 , further comprising at least one additive chosen from antioxidants, thermal stabilizers, carrier fluids, metal deactivators, dyes, markers, corrosion inhibitors, biocides, antistatic additives, drag reducing agents, demulsifiers, emulsifiers, dehazers, anti-icing additives, antiknock additives, anti-valve-seat recession additives, surfactants, other lubricity additives, combustion improvers, and cetane number improvers. 
   
   
       14 . The fuel composition of  claim 1 , wherein the fuel is selected from the group consisting of diesel fuel, jet fuel, alcohols, ethers, kerosene, low sulfur fuels, synthetic fuels, coal, biomass, liquid petroleum gas, bunker oils, gas to liquid fuels, coal to liquid fuels, biomass to liquid fuels, high asphaltene fuels, fuels derived from coal, genetically engineered biofuels and crops and extracts therefrom, natural gas, propane, butane, unleaded motor and aviation gasolines, and so-called reformulated gasolines which typically contain both hydrocarbons of the gasoline boiling range and fuel-soluble oxygenated blending agents. 
   
   
       15 . A method for reducing deposit formation in an engine comprising:
 providing to the engine a fuel composition comprising a deposit-modifying effective amount of a hydrocarbyl-substituted succinimide; a detergent; and a fuel.   
   
   
       16 . The method of  claim 15 , wherein the hydrocarbyl-substituted succinimide is the product of contacting a hydrocarbyl-substituted succinic anhydride and ammonia. 
   
   
       17 . The method of  claim 16 , wherein the hydrocarbyl-substituted succinic anhydride is the product of contacting an olefinic unsaturated hydrocarbon comprising from about 10 to about 24 carbon atoms and maleic anhydride. 
   
   
       18 . The method of  claim 17 , wherein the olefinic unsaturated hydrocarbon is linear or branched. 
   
   
       19 . The method of  claim 17 , wherein the olefinic unsaturated hydrocarbon has a number average molecular weight ranging from about 100 to about 600. 
   
   
       20 . The method of  claim 17 , wherein the olefinic unsaturated hydrocarbon is polyisobutylene. 
   
   
       21 . The method of  claim 15 , wherein the detergent is selected from the group consisting of Mannich base detergents, polyetheramines, and hydrocarbyl amines. 
   
   
       22 . The method of  claim 15 , further comprising a carrier fluid. 
   
   
       23 . The method of  claim 15 , further comprising at least one additive chosen from antioxidants, thermal stabilizers, carrier fluids, metal deactivators, dyes, markers, corrosion inhibitors, biocides, antistatic additives, drag reducing agents, demulsifiers, emulsifiers, dehazers, anti-icing additives, antiknock additives, anti-valve-seat recession additives, surfactants, other lubricity additives, combustion improvers, and cetane number improvers. 
   
   
       24 . Use in a combustion system of a fuel composition according to  claim 1 , wherein the combustion system is selected from the group consisting of any diesel-electric hybrid vehicle, a gasoline-electric hybrid vehicle, a two-stroke engine, stationary burners, waste incinerators, diesel fuel burners, diesel fuel engines, jet engines, HCCl engines automotive diesel engines, gasoline fuel burners, gasoline fuel engines, and power plant generators.