Fuel lubricity from blends of lubricity improvers and corrosion inhibitors or stability additives

Abstract

It has been discovered that compositions that are blends or mixtures of certain lubricity additives and corrosion inhibitors and/or stability additives can serve as improved lubricity additive compositions in distillate fuels. The corrosion inhibitors may include, but are not necessarily limited to, saturated or unsaturated monomer, dimer, and trimer fatty acids, succinic acids, imidazolines, and mixtures thereof. Suitable stability additives include, but are not necessarily limited to, amines, amides, amine/aldehyde condensates, polymer dispersants, and mixtures thereof, where the stability additive is different from the lubricity additive. It has been surprisingly discovered that less lubricity additive may be used in the compositions when the stability additive or corrosion inhibitor is present to achieve the same lubricity result, as compared with compositions that do not contain a stability additive or corrosion inhibitor, yet the same total amount of additive composition.

1 . A composition for improving the lubricity of diesel and kerosene distillate fuels having 0.2 wt % or less sulfur comprising: 
 (a) at least one lubricity additive selected from the group consisting of 
 ester-based lubricity additives selected from the group consisting of reaction products of: 
 carboxylic acids selected from the group consisting of saturated, unsaturated, mixed saturated and unsaturated di- and tri-carboxylic acids having from 12 to 72 carbon atoms with  
 hydroxyl compounds selected from the group consisting of alcohols, glycols, polyglycols, and mixtures thereof; and  
 
 amide-based lubricity additives selected from the group consisting of reaction products of: 
 carboxylic acids selected from the group consisting of saturated, unsaturated, mixed saturated and unsaturated, and aryl substituted carboxylic acids having from 12 to 72 carbon atoms with  
 amines selected from the group consisting of alkanolamines, alkylamines, cyclic amines, aromatic amines, polyamines, and mixtures thereof; and  
 
   (b) at least one second additive selected from the group consisting of 
 corrosion inhibitors selected from the group consisting of saturated or unsaturated monomer, dimer, and trimer fatty acids, succinic acids, imidazolines, and mixtures thereof;  
 stability additives selected from the group consisting of hindered primary, secondary and tertiary amines, amides,  
 amine/aldehyde condensates, and mixtures thereof, where the  
 stability additive is different from the lubricity additive; and  
   mixtures thereof.    
     
     
         2 . The composition of  claim 1  where the corrosion inhibitors are further selected from the group consisting of 
 dimer and trimer fatty acids that are the reaction products of C12-C22 saturated and unsaturated monomer acids to produce dimers and trimers,    C12-C22 saturated and unsaturated monomer fatty acids and mixtures thereof, tetrapropenylsuccinic acid, and    reaction products between C12-C22 saturated and unsaturated monomer fatty acids with blends of diethylenetriamine or aminoethylethanolamine.    
     
     
         3 . The composition of  claim 1  where the stability additives are further selected from the group consisting of 
 hindered C8-C22 primary, secondary, or tertiary amines,    alkanolamides made from diethanolamine and fatty acids,    condensates of C4-C12 alkyl phenols with aldehydes and alkyldiamines, and    diaminomethanes and mixtures thereof.    
     
     
         4 . The composition of  claim 1  where 
 the proportion of lubricity additive (a) ranges from about 10 to about 400 ppm;    the proportion of the at least one second additive (b) ranges from about 1 to about 60 ppm;    based on the distillate fuel.    
     
     
         5 . A composition for improving the lubricity of diesel and kerosene distillate fuels having 0.2 wt % or less sulfur comprising: 
 (a) at least one lubricity additive selected from the group consisting of 
 ester-based lubricity additives selected from the group consisting of reaction products of: 
 carboxylic acids selected from the group consisting of saturated, unsaturated, mixed saturated and unsaturated di- and tri-carboxylic acids having from 12 to 72 carbon atoms with  
 hydroxyl compounds selected from the group consisting of alcohols, glycols, polyglycols, and mixtures thereof; and  
 
 amide-based lubricity additives selected from the group consisting of reaction products of: 
 carboxylic acids selected from the group consisting of saturated, unsaturated, mixed saturated and unsaturated, and aryl substituted carboxylic acids having from 12 to 72 carbon atoms with  
 amines selected from the group consisting of alkanolamines, alkylamines, cyclic amines, aromatic amines, polyamines, and mixtures thereof; and  
 
   (b) at least one second additive selected from the group consisting of 
 corrosion inhibitors selected from the group consisting of 
 dimer and trimer fatty acids that are the reaction products of C12-C22 saturated and unsaturated monomer acids to produce dimers and trimers,  
 C12-C22 saturated and unsaturated monomer fatty acids and mixtures thereof, tetrapropenylsuccinic acid, and  
 reaction products between C12-C22 saturated and unsaturated monomer fatty acids with blends of diethylenetriamine or aminoethylethanolamine;  
 
 stability additives selected from the group consisting of; 
 hindered C8-C22 primary, secondary, or tertiary amines,  
 alkanolamides made from diethanolamine and fatty acids,  
 condensates of C4-C12 alkyl phenols with aldehydes and alkyldiamines, and  
 diaminomethanes and mixtures thereof; and  
 
   mixtures thereof.    
     
     
         6 . A distillate fuel having improved lubricity comprising: 
 (A) a hydrocarbon having 0.2 wt. % or less sulfur selected from the group consisting of diesel fuel and kerosene; and    (B) an effective amount of a composition for improving the lubricity of distillate fuels comprising: 
 (a) at least one lubricity additive selected from the group consisting of 
 ester-based lubricity additives selected from the group consisting of reaction products of: 
 carboxylic acids selected from the group consisting of carboxylic acids selected from the group consisting of saturated, unsaturated, mixed saturated and unsaturated mono-, di- and tri-carboxylic acids having from 12 to 72 carbon atoms with  
 hydroxyl compounds selected from the group consisting of alcohols, glycols, polyglycols, and mixtures thereof; and  
 
 amide-based lubricity additives selected from the group consisting of reaction products of: 
 carboxylic acids selected from the group consisting of saturated, unsaturated, mixed saturated and unsaturated, and aryl substituted carboxylic acids having from 12 to 72 carbon atoms with  
 amines selected from the group consisting of alkanolamines, alkylamines, cyclic amines, aromatic amines, polyamines and mixtures thereof; and  
 
 
 (b) at least one second additive selected from the group consisting of 
 corrosion inhibitors selected from the group consisting of saturated or unsaturated monomer, dimer, and trimer fatty acids, succinic acids, imidazolines, and mixtures thereof;  
 stability additives selected from the group consisting of hindered primary, secondary, and tertiary amines, amides, amine/aldehyde condensates, diaminomethanes, polyamines, and mixtures thereof, where the stability additive is different from the lubricity additive; and  
 mixtures thereof.  
 
   
     
     
         7 . The distillate fuel of  claim 6  where the corrosion inhibitors are further selected from the group consisting of 
 dimer and trimer fatty acids that are the reaction products of C12-C22 saturated and unsaturated monomer acids to produce dimers and trimers,    C12-C22 saturated and unsaturated monomer fatty acids and mixtures thereof,    tetrapropenylsuccinic acid, and    reaction products between C12-C22 saturated and unsaturated monomer fatty acids with blends of diethylenetriamine or aminoethylethanolamine.    
     
     
         8 . The distillate fuel of  claim 6  where the stability additives are further selected from the group consisting of 
 hindered C10-C22 primary, secondary, or tertiary amines,    alkanolamides made from diethanolamine and fatty acids,    condensates of C4-C12 alkyl phenols with aldehydes and alkyldiamines, and    diaminomethanes and mixtures thereof.    
     
     
         9 . The distillate fuel of  claim 6  where 
 the proportion of lubricity additive (a) ranges from about 10 to about 400 ppm;    the proportion of the at least one second additive (b) ranges from about 1 to about 60 ppm;    based on the distillate fuel.    
     
     
         10 . A method for improving the lubricity of distillate fuel comprising: 
 (A) providing a hydrocarbon having 0.2 wt. % or less sulfur selected from the group consisting of diesel fuel and kerosene; and    (B) adding to the hydrocarbon an effective amount of a composition for improving the lubricity of the hydrocarbon, where the composition comprises: 
 (a) at least one lubricity additive selected from the group consisting of 
 ester-based lubricity additives selected from the group consisting of reaction products of; 
 carboxylic acids selected from the group consisting of saturated, unsaturated, mixed saturated and unsaturated, and aryl substituted mono-, di- and tri-carboxylic acids having from 12 to 72 carbon atoms with  
 hydroxyl compounds selected from the group consisting of alcohols, glycols, polyglycols, and mixtures thereof; and  
 
 amide-based lubricity additives selected from the group consisting of reaction products of: 
 carboxylic acids selected from the group consisting of saturated, unsaturated, mixed saturated and unsaturated, and aryl substituted carboxylic acids having from 12 to 72 carbon atoms with  
 amines selected from the group consisting of alkanolamines, alkylamines, cyclic amines, aromatic amines, and mixtures thereof; and  
 
 
 (b) at least one second additive selected from the group consisting of 
 corrosion inhibitors selected from the group consisting of saturated or unsaturated monomer, dimer, and trimer fatty acids, succinic acids, imidazolines, and mixtures thereof;  
 stability additives selected from the group consisting of amines, amides, amine/aldehyde condensates, hindered primary, secondary, and tertiary amines, and mixtures thereof, where the stability additive is different from the lubricity additive; and  
 mixtures thereof.  
 
   
     
     
         11 . The method of  claim 10  where in adding the composition, the corrosion inhibitors are further selected from the group consisting of 
 dimer and trimer fatty acids that are the reaction products of C14-C22 saturated and unsaturated monomer acids to produce dimers and trimers,    C12-C22 saturated and unsaturated monomer fatty acids and mixtures thereof,    tetrapropenylsuccinic acid, and    reaction products between C12-C22 saturated and unsaturated monomer fatty acids with blends of diethylenetriamine or aminoethylethanolamine.    
     
     
         12 . The method of  claim 10  where in adding the composition, the stability additives are further selected from the group consisting of 
 hindered C10-C22 primary amines,    alkanolamides made from diethanolamine and fatty acids,    condensates of C4-C12 alkyl phenols with aldehydes and alkyldiamines.    
     
     
         13 . The method of  claim 9  where in adding the composition, 
 the proportion of lubricity additive (a) ranges from about 10 to about 400 ppm;    the proportion of the at least one second additive (b) ranges from about 1 to about 60 ppm;    based on the distillate fuel.