Method and compositions for reducing deposits in engines combusting ethanol-containing fuels and a corrosion inhibitor

Abstract

The present disclosure provides compositions and methods for reducing deposit formation in engines combusting a fuel containing ethanol and a corrosion inhibitor. In particular, E85 fuels with a corrosion inhibitor are provided containing polyetheramine additives able to reduce, eliminate and/or prevent deposits on engine combustion surfaces and surfaces of engine components exposed to the fuel containing ethanol and a corrosion inhibitor

1 . A method to reduce deposit formation in an internal combustion engine combusting an alcohol-containing fuel composition comprising a corrosion inhibitor, said method comprising (a) combining the fuel with at least one polyetheramine fuel additive, and (b) combusting the fuel and polyetheramine fuel additive in the engine, whereby deposit formation is reduced relative to the deposit formation occurring when combusting the alcohol-containing fuel with a corrosion inhibitor but without a polyetheramine fuel additive. 
     
     
         2 . The method of  claim 1 , wherein the polyetheramine fuel additive is selected from the group consisting of organic compounds having one or more aminic nitrogen atoms, and one or more oxygen-containing ether bonds, wherein said organic compound has a molecular weight of 700 to 3000. 
     
     
         3 . The method of  claim 1 , wherein the fuel further comprises gasoline. 
     
     
         4 . The method of  claim 1 , wherein the alcohol is selected from the group consisting of methanol, ethanol, propanol, butanol, and mixtures of any combinations thereof. 
     
     
         5 . The method of  claim 1 , wherein the corrosion inhibitor is selected from the group consisting of those materials having a structure NH 2 (CH 2 ) n —NH—(CH 2 ) m O—C 8-10  where n and m are independently 1 to about 10. 
     
     
         6 . The method of  claim 1 , wherein the corrosion inhibitor is selected from the group consisting of those materials having a structure NH 2 (CH 2 ) n —NH—C 8-10  where n is 1 to about 10. 
     
     
         7 . The method of  claim 1 , wherein the corrosion inhibitor comprises the result of combining a carboxylic acid or diacid and an amine, diamine or polyamine. 
     
     
         8 . The method of  claim 1 , wherein the corrosion inhibitor has a molecular weight of less an 700 and is selected from the group consisting of monoamines, diamines, triamines, polyamines, etheramines, imines, imidazolines, thiadiazoles, monocarboxylic acids, dicarboxylic acids, p-phenylenediamine, dicyclohexylamine, alkyl substituted succinic anhydrides and acids, mixtures and reaction products thereof and salts thereof. 
     
     
         9 . A composition to reduce deposit formation in an internal combustion engine combusting an alcohol-containing fuel, said composition comprising a corrosion inhibitor, alcohol, and one or more materials selected from the group consisting of polyetheramine dispersants. 
     
     
         10 . The composition of  claim 9 , wherein the alcohol is selected from the group consisting of methanol, ethanol, propanol, butanol, and mixtures of any combination thereof. 
     
     
         11 . The composition of  claim 9 , wherein the alcohol is ethanol. 
     
     
         12 . The composition of  claim 9 , wherein the fuel further comprises gasoline. 
     
     
         13 . The composition of  claim 11 , wherein the ethanol content of the fuel composition is from about 74% to about 85% and wherein the corrosion inhibitor comprises the result of combining a carboxylic acid and an amine. 
     
     
         14 . A fuel additive concentrate for gasoline engines combusting an alcohol-containing fuel containing a corrosion inhibitor, said concentrate comprising one or more corrosion inhibitors, a polyetheramine additive and a diluent selected from the group consisting of an oil, a fuel, gasoline, an alcohol, solvent, carrier fluid, and other liquid materials combustible in a gasoline engine. 
     
     
         15 . A fuel additive concentrate comprising an alcohol and polyetheramine. 
     
     
         16 . The fuel additive of  claim 15 , wherein the alcohol is ethanol. 
     
     
         17 . A fuel additive concentrate comprising alcohol and a corrosion inhibitor. 
     
     
         18 . The fuel additive of  claim 17 , wherein the alcohol is ethanol. 
     
     
         19 . A fuel comprising alcohol, gasoline, a polyetheramine fuel additive and a corrosion inhibitor selected form the group consisting of Octel DCI-11 corrosion inhibitor, Petrolite Tolad 3222 corrosion inhibitor, Petrolite Tolad 3224 corrosion inhibitor, Nalco 5403 corrosion inhibitor, ENDCOR FE-9730 corrosion inhibitor, MidContinental MCC5011E corrosion inhibitor, MidContinental MCC5011EW corrosion inhibitor, CorrPro 654 corrosion inhibitor, NALCO 5403 corrosion inhibitor, ENDCOR FE 9730 corrosion inhibitor, and Betz® ACN 13 corrosion inhibitor. 
     
     
         20 . The fuel composition of  claim 19 , wherein the alcohol is ethanol. 
     
     
         21 . A method to reduce the formation of deposits in an internal combustion engine, said method comprising combusting in said engine a fuel composition comprising gasoline, alcohol, a corrosion inhibitor and at least one polyetheramine fuel additive, whereby deposits in the engine are prevented or reduced relative to the deposits produced in the engine when combusting an alcohol-containing fuel composition containing a corrosion inhibitor but without at least one polyetheramine fuel additive. 
     
     
         22 . The method of  claim 21 , wherein the alcohol is ethanol. 
     
     
         23 . A fuel composition that is, or can comprise, 1.0 to 100 volume percent of one or more alcohols, and 0 to 99% gasoline, and a corrosion-inhibiting amount of a corrosion inhibitor, said inhibitor derived form, by weight, (a) about 35% to 70% of at least one mono- or di-alkenyl succinic acid in which the alkenyl group has 8 to 18 carbons; and (b) about 30% to 65% of an aliphatic or cycloaliphatic amine containing 2 to 12 carbon atoms, wherein the corrosion inhibitor is present in the fuel composition at less than about 1000 ppm. 
     
     
         24 . A fuel comprising:
 (a) one or more alcohols,   (b) gasoline,   (c) the product of combining an organic carboxylic acid or diacid and an amine, diamine, or polyamine, and   (d) a polyetheramine.   
     
     
         25 . The fuel of  claim 24 , wherein the one or more alcohols comprise(s) ethanol.