Fuel additive composition suitable for control and removal of tenacious engine deposits

Abstract

Disclosed is a fuel composition for the control and/or removal of persistent engine deposits. Said fuel composition comprises a major amount of hydrocarbons boiling in the gasoline range fuel, a hydrocarbyl-substituted polyoxyalkylene amine and a glycol ether component; and is useful for the prevention and control engine deposits.

1 . A fuel composition comprising a major amount of hydrocarbons boiling in the gasoline range and 
 a) 2,200 to 30,000 parts per million by weight of a hydrocarbyl-substituted polyoxyalkylene amine of the formula:                        wherein:    R is a hydrocarbyl group having from about 1 to about 30 carbon atoms;    R 1  and R 2  are each independently hydrogen or lower alkyl having from about 1 to about 6 carbon atoms and each R 1  and R 2  is independently selected in each —O—CHR 1 —CHR 2 — unit;    A is amino, N-alkyl amino having about 1 to about 20 carbon atoms in the alkyl group, N,N-dialkyl amino having about 1 to about 20 carbon atoms in each alkyl group, or a polyamine moiety having about 2 to about 12 amine nitrogen atoms and about 2 to about 40 carbon atoms; and    x is an integer from about 5 to about 100; and      b) 1,000 to 60,000 parts per million by weight of at least one glycol ether component of the formula:      R 3 —O R 4 O   y H  wherein:    R 3  is a hydrocarbyl group having from about 1 to about 30 carbon atoms; R 4  is a C 2  to C 5  alkylene group; and y is an integer from 1 to 50.      
   
   
       2 . The fuel composition of  claim 1 , further comprising 100 to 10,000 parts per million by weight of an aromatic ester compound of the formula:  
     
       
         
         
             
             
         
       
       wherein:  
       R 6  is nitro or —(CH 2 ) n —NR 11 R 12 , wherein R 11  and R 12  are independently hydrogen or lower alkyl having 1 to 6 carbon atoms and n is 0 or 1;  
       R 7  is hydrogen, hydroxy, nitro or —NR 13 R 14 , wherein R 13  and R 14  are independently hydrogen or lower alkyl having 1 to 6 carbon atoms;  
       R 8  and R 9  are independently hydrogen or lower alkyl having 1 to 6 carbon atoms; and  
       R 10  is a polyalkyl group having an average molecular weight in the range of about 450 to 5,000.  
     
   
   
       3 . The fuel composition of  claim 1 , further comprising 100 to 15,000 parts per million by weight of an cyclic carbonate of the formula  
     
       
         
         
             
             
         
       
       wherein: 
 R 20 , R 21 , R 22 , R 23 , R 24 , and R 25  are independently selected from hydrogen, hydroxy, hydroxymethyl, hydroxyethyl, hydrocarbyl group from about 1 to 6 carbon atoms; and z is an integer from zero to one.  
 
     
   
   
       4 . The fuel composition according to  claim 1 , wherein R is alkyl or alkylphenyl.  
   
   
       5 . The fuel composition according to  claim 1 , wherein one of R 1  and R 2  is lower alkyl of 1 to 4 carbon atoms, and the other is hydrogen.  
   
   
       6 . The fuel composition according to  claim 5 , wherein one of R 1  and R 2  is methyl or ethyl, and the other is hydrogen.  
   
   
       7 . The fuel composition according to  claim 1 , wherein x is an integer from about 5 to 50.  
   
   
       8 . The fuel composition according to  claim 7 , wherein x is an integer from about 8 to 30.  
   
   
       9 . The fuel composition according to  claim 8  wherein x is an integer from about 10 to 25.  
   
   
       10 . The fuel composition according to  claim 1 , wherein A is amino or N-alkyl amino having from 1 to 4 carbon atoms.  
   
   
       11 . The fuel composition according to  claim 1 , wherein A is a polyamine selected from the group consisting of ethylene diamine and diethylene triamine.  
   
   
       12 . The fuel composition according to  claim 1 , wherein the composition contains from 3,000 to 20,000 parts per million by weight of the hydrocarbyl-substituted polyoxyalkylene amine.  
   
   
       13 . The fuel composition according to  claim 12 , wherein the composition contains from 6,000 to 15,000 parts per million by weight of the hydrocarbyl-substituted polyoxyalkylene amine.  
   
   
       14 . The fuel composition according to  claim 12 , wherein the composition contains from 12,000 to 20,000 parts per million by weight of the hydrocarbyl-substituted polyoxyalkylene amine.  
   
   
       15 . The fuel composition according to  claim 1 , wherein the composition contains greater than 12,000 parts per million by weight of a hydrocarbyl-substituted polyoxyalkylene amine.  
   
   
       16 . The fuel composition according to  claim 1 , wherein R 3  is alkyl, alkylphenyl, or phenyl.  
   
   
       17 . The fuel composition according to  claim 1  wherein R 4  is a C 2  to C 4  alkylene group.  
   
   
       18 . The fuel composition according to  claim 1  wherein y is an integer from about 8 to 30.  
   
   
       19 . The fuel composition according to  claim 18 , wherein y is an integer from about 10 to 25.  
   
   
       20 . The fuel composition according to  claim 1 , wherein y is an integer from 1 to 4.  
   
   
       21 . The fuel composition according to  claim 20 , wherein R 4  is ethylene or propylene.  
   
   
       22 . The fuel composition according to  claim 21 , wherein R 3  is selected so that the molecular weight of each of the at least one glycol ether is from about 100 to 450.  
   
   
       23 . The fuel composition according to  claim 22 , wherein the molecular weight is less than 350.  
   
   
       24 . The fuel composition according to  claim 1 , wherein the composition contains from 1,500 to 40,000 parts per million by weight of the at least glycol ether.  
   
   
       25 . The fuel composition according to  claim 24 , wherein the composition contains from 3,000 to 30,000 parts per million by weight of the glycol ether.  
   
   
       26 . The fuel composition according to  claim 22 , wherein the composition contains from 3,000 to 15,000 parts per million by weight of a mixture of glycol ethers.  
   
   
       27 . The fuel composition according to  claim 2 , wherein R 6  is amino or —CH 2 NH 2 .  
   
   
       28 . The fuel composition according to  claim 2 , wherein R 7  is hydrogen or hydroxyl.  
   
   
       29 . The fuel composition according to  claim 2 , wherein one of R 9  and R 9  is hydrogen, methyl or ethyl and the other is hydrogen.  
   
   
       30 . The fuel composition according to  claim 29 , wherein R 9  is hydrogen.  
   
   
       31 . The fuel composition according to  claim 2 , wherein R 10  is a polyalkyl group having an average molecular in the range of about 900 to 2,500.  
   
   
       32 . The fuel composition according to  claim 2 , wherein R 6  is amino, R 7 , R 8  and R 9  are hydrogen and R 10  is a polyalkyl group derived from polyisobutene.  
   
   
       33 . The fuel composition according to  claim 2 , wherein the composition contains from 150 to 10,000 parts per million by weight of the aromatic ester.  
   
   
       34 . The fuel composition according to  claim 33 , wherein the composition contains from 150 to 5,000 parts per million by weight of the aromatic ester.  
   
   
       35 . The fuel composition according to  claim 34 , wherein the composition contains from 200 to 3,000 parts per million by weight of the aromatic ester.  
   
   
       36 . The fuel composition according to  claim 3 , wherein z is zero and R 20 , R 21 , R 22  are hydrogen.  
   
   
       37 . The fuel composition according to  claim 3 , wherein the cyclic carbonate is selected from the group consisting of 1,3-dioxolan-2-one; 4-methyl-1,3-dioxolan-2-one; 4-hydroxymethyl-1,3-dioxolan-2-one; 4,5-dimethyl-1,3-dioxolan-2-one; 4-ethyl-1,3-dioxolan-2-one; 4,4-dimethyl-1,3-dioxolan-2-one (previous three also referred to as butylenes carbonates); 4-methyl-5-ethyl-1,3-dioxolan-2-one; 4,5-diethyl-1,3-dioxolan-2-one; 4,4-diethyl-1,3-dioxolan-2-one; 1,3-dioxan-2-one; 4,4-dimethyl-1,3-dioxan-2-one; 5,5-dimethyl-1,3-dioxan-2-one; 5,5-dihydroxymethyl-1,3-dioxan-2-one; 5-methyl-1,3-dioxan-2-one; 4-methyl-1,3-dioxan-2-one; 5-hydroxy-1,3-dioxan-2-one; 5-hydroxymethyl-5-methyl-1,3-dioxan-2-one; 5,5-diethyl-1,3-dioxan-2-one; 5-methyl-5-propyl-1,3-dioxan-2-one; 4,6-dimethyl-1,3-dioxan-2-one; and 4,4,6-trimethyl-1,3-dioxan-2-one.  
   
   
       38 . The fuel composition according to  claim 37 , wherein the cyclic carbonate is selected from 1,3-dioxolan-2-one and 4-methyl-1,3-dioxolan-2-one.  
   
   
       39 . The fuel composition according to  claim 3 , wherein the composition contains from 200 to 7,000 parts per million by weight of the cyclic carbonate.  
   
   
       40 . The fuel composition according to  claim 33 , wherein the composition contains from 150 to 5,000 parts per million by weight of the cyclic carbonate.  
   
   
       41 . The fuel composition according to  claim 34 , wherein the composition contains from 200 to 3,000 parts per million by weight of the cyclic carbonate.  
   
   
       42 . The fuel composition according to  claim 1 , wherein: 
 the composition contains greater than 15,000 parts per million by weight of the hydrocarbyl-substituted polyoxyalkylene amine, wherein R is alkylphenyl having from 12 to 24 carbon atoms, R 1  is hydrogen, R 2  is methyl or ethyl, x is an integer from 10 to 25, and A is amino; and    the composition contains 3,000 to 15,000 parts per million by weight of the at least one glycol ether, wherein R 3  is alkyl from 1 to 6 carbon atoms or phenyl, R 4  is ethylene or 1,2-propylene and y is an integer from 1 to 3.    
   
   
       43 . The composition according to  claim 42 , wherein the at least one glycol ether is a mixture of glycol ethers.  
   
   
       44 . The composition according to  claim 43  wherein the hydrocarbyl-substituted polyoxyalkylene amine is a dodecylphenoxy poly(oxybutylene) amine and wherein the at least one glycol ether is a mixture of 2-butoxy-ethanol and of 2-phenoxy-ethanol.