Composition for corrosion inhibition in a fuel mixture and its method of preparation thereof

Abstract

The present disclosure relates to a composition for corrosion inhibition in a fuel mixture. The present disclosure also relates to a method for preparing a composition for corrosion inhibition in a fuel mixture. The corrosion inhibitor of the present invention delivered excellent corrosion resistance, minimum dosage levels & good stability and miscibility which can be used for mitigating corrosion issues in neat Ethanol and Gasohol.

We claim: 
     
         1 . A composition for corrosion inhibition in a fuel mixture, the composition comprising:
 0.1-4 w/w % of an amine;   0.1-4 w/w % of a quaternary ammonium salt;   0.1-3 w/w % of an antioxidant;   30-60 w/w % of a polar solvent; and   30-60 w/w % of a hydrocarbon-based solvent,   wherein the w/w % is based on the total weight of the composition.   
     
     
         2 . The composition as claimed in  claim 1 , wherein the weight ratio between the polar solvent and the hydrocarbon-based solvent is in the range of 1:4 to 4:1. 
     
     
         3 . The composition as claimed in  claim 1 , wherein the amine is derived from an aliphatic base having 4 to 18 carbon atoms. 
     
     
         4 . The composition as claimed in  claim 1 , wherein the quaternary ammonium salt is selected from a group consisting of tetraalkyl ammonium halide, trialkylmethyl ammonium halide, dialkyldimethyl ammonium halide, tetrabutyl ammonium halide and combination thereof. 
     
     
         5 . The composition as claimed in  claim 1 , wherein the antioxidant is selected from a group consisting of amine antioxidants, sterically hindered phenolic antioxidants, polyhydroxy phenolic antioxidants, derivatives and mixtures thereof. 
     
     
         6 . The composition as claimed in  claim 5 , wherein the sterically hindered phenolic antioxidant is selected from a group consisting of 2-methyl-6-tert-butylphenol, 2,4-dimethyl-6-tert-butylphenol, 4-(N,N-di-methylaminomethyl)-2,6-di-tert-butylphenol, 4-ethyl-2,6-di-tertbutylphenol, 2,6-bis(1,1-dimethylethyl)-4-methylphenol, 2-tert-butyl-4,6-dimethylphenol, 2,6-di-tert-butyl-4-ethylphenol, 2,6-di-tert-butyl-4-methylphenol, 2,6-di-tert-butyl-4-n-butylphenol and combination thereof. 
     
     
         7 . The composition as claimed in  claim 1 , wherein the polar solvent is selected from a group consisting of acetone, methanol, ethanol, ethylacetate, butanol, isopropyl alcohol and combination thereof. 
     
     
         8 . The composition as claimed in  claim 1 , wherein the hydrocarbon-based solvent is selected from a group consisting of kerosene, toluene, xylene, hexane, petroleum ether, heptanes and combination thereof. 
     
     
         9 . The composition as claimed in  claim 1 , wherein the corrosion inhibitor is effective for gasohol blends comprising 5 to 100 volume % of ethanol. 
     
     
         10 . The composition as claimed in  claim 1 , wherein the composition is capable of attaining a B++(<0.1%) rating for carbon steel in accordance with NACE standards for E5-E50 blends and neat ethanol. 
     
     
         11 . A method for preparing a composition for corrosion inhibition in a fuel mixture, said method comprising:
 a) mixing 30-60 w/w % of a polar solvent, 0.1-3 w/w % of an antioxidant, 0.1-4 w/w % of a quaternary ammonium salt and 0.1-4 w/w % of an amine to obtain a first mixture; and   b) mixing 30-60 w/w % of hydrocarbon-based solvent to the first mixture to obtain a corrosion inhibitor in a fuel mixture,   wherein the w/w % is based on the total weight of the composition.   
     
     
         12 . A fuel composition comprising:
 a fuel mixture, and   10 to 200 ppm of a composition comprising:
 0.1-4 w/w % of an amine; 
 0.1-4 w/w % of a quaternary ammonium salt; 
 0.1-3 w/w % of an antioxidant; 
 30-60 w/w % of a polar solvent; and 
 30-60 w/w % of a hydrocarbon-based solvent, 
 wherein the w/w % is based on the total weight of the composition. 
   
     
     
         13 . The fuel composition as claimed in  claim 11 , wherein the fuel mixture comprises ethanol and gasoline. 
     
     
         14 . Use of a composition comprising
 0.1-4 w/w % of an amine;   0.1-4 w/w % of a quaternary ammonium salt;   0.1-3 w/w % of an antioxidant;   30-60 w/w % of a polar solvent; and   30-60 w/w % of a hydrocarbon-based solvent,   wherein the w/w % is based on the total weight of the composition,   as a corrosion inhibitor in a fuel mixture of ethanol and gasoline.