Ethoxylated fatty diamine as a corrosion inhibitor for pipelines and storage tanks

Abstract

A corrosion inhibition composition includes a carrier fluid and corrosion inhibitor consisting essentially of a compound represented by Formula (I):where R1, R2, R3, and R4 are each, independently, a hydrogen or an alkoxy group, and m and n are each, independently integers ranging from 2 to 10, where R5 and R6 are each, independently, a saturated C6-C10 hydrocarbon group or an unsaturated C6-C10 hydrocarbon group. A method of producing a corrosion inhibition composition consisting essentially of an ethoxylated diamine corrosion inhibitor and a carrier fluid and a method for inhibiting corrosion in a refined hydrocarbon-bearing system are also described.

1 . A corrosion inhibition composition, comprising:
 a corrosion inhibitor consisting essentially of a compound represented by Formula (I):   
       
         
           
           
               
               
           
         
         where R 1 , R 2 , R 3 , and R 4  are each, independently, a hydrogen or an alkoxy group, and m and n are each, independently integers ranging from 2 to 10, 
         wherein R 5  and R 6  are each, independently, a saturated C 6 -C 10  hydrocarbon group or an unsaturated C 6 -C 10  hydrocarbon group; and 
         a carrier fluid. 
       
     
     
         2 . The corrosion inhibition composition of  claim 1 , wherein R 1 , R 2 , R 3 , and R 4  are each, independently, an ethoxy group. 
     
     
         3 . The corrosion inhibition composition of  claim 1 , wherein the corrosion inhibitor consisting essentially of a compound represented by Formula (I) is a reaction product derived from a fatty diamine and an epoxide. 
     
     
         4 . The corrosion inhibition composition of  claim 1 , wherein an amount of the corrosion inhibitor consisting essentially of a compound represented by Formula (I) ranges from about 20 wt % (weight percent) to about 30 wt % based on the total weight of the corrosion inhibition composition. 
     
     
         5 . The corrosion inhibition composition of  claim 1 , wherein the carrier fluid is in an amount ranging from about 70 wt % to about 80 wt % based on the total weight of the corrosion inhibition composition. 
     
     
         6 . The corrosion inhibition composition of  claim 1 , wherein the carrier fluid is selected from the group consisting of diesel, heavy aromatic naphtha, benzene, toluene, isopropyl alcohol, and combinations thereof. 
     
     
         7 . The corrosion inhibition composition of  claim 1 , wherein the corrosion inhibitor consists essentially of a compound represented by Formula (II): 
       
         
           
           
               
               
           
         
       
     
     
         8 . A method of producing a corrosion inhibition composition consisting essentially of an ethoxylated diamine corrosion inhibitor and a carrier fluid, the method comprising:
 reacting ethylene oxide with a diamine represented by Formula (III):   
       
         
           
           
               
               
           
         
         wherein R 5  and R 6  are each, independently, a saturated C 6 -C 10  hydrocarbon group or an unsaturated C 6 -C 10  hydrocarbon group, thereby producing an ethoxylated diamine corrosion inhibitor represented by Formula (IV): 
       
       
         
           
           
               
               
           
         
       
       and
 introducing the ethoxylated diamine corrosion inhibitor to the carrier fluid. 
 
     
     
         9 . The method of  claim 8 , wherein the diamine is Priamine™ 1074. 
     
     
         10 .- 19 . (canceled)