Alkoxylated unsaturated carboxylic acid additives for low-sulfur fuels

Abstract

Compositions comprising: (i) a fuel component selected from the group consisting of diesel, gasoline, kerosene, other hydrocarbons which are liquid at room temperature and mixtures thereof; and (ii) and an additive of the general formula (I) are described: R—COO—(C n H 2n —O) k —H  (I) wherein R represents a mono- or poly-unsaturated alkylene group having from 10 to 17 carbon atoms, n is 2 or 3, and k represents a number of from 0.5 to 3; wherein the fuel component is present in an amount of more than 50% by weight, wherein the additive is present in an amount of from 0.001 to 0.1% by weight; and wherein the composition has a sulfur content of 0.2% by weight or less, all weight percents based on the composition.

1 - 16 . (canceled)  
   
   
       17 . A composition comprising: (i) a fuel component selected from the group consisting of diesel, gasoline, kerosene, other hydrocarbons which are liquid at room temperature and mixtures thereof; and (ii) and an additive of the general formula (I): 
       R—COO—(C n H 2n —O) k —H  (I) 
     wherein R represents a mono- or poly-unsaturated alkylene group having from 10 to 17 carbon atoms, n is 2 or 3, and k represents a number of from 0.5 to 3; wherein the fuel component is present in an amount of more than 50% by weight, wherein the additive is present in an amount of from 0.001 to 0.1% by weight; and wherein the composition has a sulfur content of 0.2% by weight or less, all weight percents based on the composition.  
   
   
       18 . The composition according to  claim 17 , wherein n is 2.  
   
   
       19 . The composition according to  claim 17 , wherein k represents a number of from 0.5 to 1.5.  
   
   
       20 . The composition according to  claim 17 , wherein k is 1.  
   
   
       21 . The composition according to  claim 18 , wherein k represents a number of from 0.5 to 1.5.  
   
   
       22 . The composition according to  claim 18 , wherein k is 1.  
   
   
       23 . The composition according to  claim 17 , wherein R represents a mono- or poly-unsaturated alkylene group having 17 carbon atoms.  
   
   
       24 . The composition according to  claim 17 , wherein R represents a mono-unsaturated alkylene group having 17 carbon atoms.  
   
   
       25 . The composition according to  claim 21 , wherein R represents a mono- or poly-unsaturated alkylene group having 17 carbon atoms.  
   
   
       26 . The composition according to  claim 21 , wherein R represents a mono-unsaturated alkylene group having 17 carbon atoms.  
   
   
       27 . The composition according to  claim 17 , wherein the additive is present in an amount of from 0.001 to 0.01% by weight.  
   
   
       28 . The composition according to  claim 23 , wherein the additive is present in an amount of from 0.001 to 0.01% by weight.  
   
   
       29 . The composition according to  claim 25 , wherein the additive is present in an amount of from 0.001 to 0.01% by weight.  
   
   
       30 . The composition according to  claim 17 , wherein the composition has a sulfur content of from 0.005 to 0.05% by weight.  
   
   
       31 . The composition according to  claim 17 , wherein the composition has a sulfur content of 0.005% by weight or less.  
   
   
       32 . The composition according to  claim 17 , wherein the composition has an aromatic content of less than 25% by volume.  
   
   
       33 . The composition according to  claim 17 , wherein the fuel component comprises a diesel having a cetane number below 50.  
   
   
       34 . The composition according to  claim 17 , wherein the composition has an HFRR friction coefficient at 60° C. of at most 500 μm.  
   
   
       35 . The composition according to  claim 17 , wherein the composition is free of fatty alcohols, alkoxylated fatty alcohols and alkanolamides.