Fuel composition and its use

Abstract

A method for increasing flamespeed of an internal combustion engine by burning a certain gasoline composition is provided. The gasoline composition contains (a) a major amount of a mixture of hydrocarbons in the gasoline boiling range and (b) a minor amount of at least one hydrocarbon having 5 to 12 carbon atoms and containing at least one cyclopropyl group and at least one acetylenic group.

1 . A gasoline composition comprising (a) a major amount of a mixture of hydrocarbons in the gasoline boiling range and (b) a minor amount of at least one hydrocarbon having 5 to 12 carbon atoms and containing at least one cyclopropyl group and at least one acetylenic group. 
     
     
         2 . The fuel composition of  claim 1  wherein component (b) is present in an amount from about 0.005% by weight to 20% by weight base on the total weight of the fuel. 
     
     
         3 . The fuel composition of  claim 1  wherein component (b) has a formula: 
       
         
           
           
               
               
           
         
       
       wherein n is an integer from 0 to 7; R 1  to R 6  are independently hydrogen, alkyl group having 1 to 7 carbon atoms, alkenyl group having 1 to 7 carbon atoms, alkynyl group having 1 to 7 carbon atoms, cyclic group having 1 to 7 carbon atoms, with the proviso that the total number of carbon atoms in the compound are from 5 to 12. 
     
     
         4 . The fuel composition of  claim 2  wherein component (b) is selected from the group consisting of cyclopropyl acetylene; 1-cyclopropyl-1-propyne; 1-cyclopropyl-2-propyne; 1-methyl-1-ethynyl-cyclopropane; 2-methyl-1-ethynyl-cyclopropane; 1,1-(3-methylene-1-propyne-1,3-diyl)bis-; 1,1-bicyclopropyl, 2,2-diethynyl-; 1-cyclopropylpenta-1,3-diyne; cyclopropane, 1,1-(1,3-butadiyne-1,4-diyl)bis-; cyclopropane, 1,1-(3-methyl-1-propyne-1,3-diyl)bis-; and 1,4-dicyclopropylbuta-1,3-diyne. 
     
     
         5 . The fuel composition of  claim 2  wherein component (b) is cyclopropyl acetylene. 
     
     
         6 . The fuel composition of  claim 4  wherein component (b) is present in an amount of 0.05 wt % to 20 wt %. 
     
     
         7 . The fuel composition of  claim 3  further comprising (c) a minor amount of a fuel detergent. 
     
     
         8 . The fuel composition of  claim 4  further comprising (c) a minor amount of a fuel detergent. 
     
     
         9 . The fuel composition of  claim 3  wherein n is an integer from 0 to 5. 
     
     
         10 . The fuel composition of  claim 9  wherein R 1  to R 6  are independently hydrogen, alkyl group having 1 to 5 carbon atoms, with the proviso that the total number of carbon atoms in the compound are from 5 to 12. 
     
     
         11 . A method of improving the flamespeed of a gasoline which comprises adding to a major portion of a gasoline mixture minor amounts of at least one hydrocarbon having 5 to 12 carbon atoms and containing at least one cyclopropyl group and at least one acetylenic group. 
     
     
         12 . A method for increasing flamespeed of an internal combustion engine which comprises burning in said engine a fuel composition of  claim 1 . 
     
     
         13 . A method for increasing flamespeed of an internal combustion engine which comprises burning in said engine a fuel composition of  claim 3 . 
     
     
         14 . A method for increasing sensitivity of a gasoline which comprises adding to a major portion of a gasoline mixture minor amounts of a at least one hydrocarbon having 5 to 12 carbon atoms and containing at least one cyclopropyl group and at least one acetylenic group.