Hydrocarbon mixtures that include corrosion inhibitor additives and methods for inhibiting corrosion by use thereof

Abstract

A hydrocarbon-containing mixture includes a hydrocarbon material including one or more hydrocarbon species, and further includes a corrosion inhibitor additive. Additionally, a method for inhibiting corrosion on a metal surface is disclosed herein.

What is claimed is: 
     
         1 . A hydrocarbon-containing mixture comprising:
 a hydrocarbon material comprising one or more hydrocarbon species; and   a corrosion inhibitor additive, wherein the corrosion inhibitor additive has the structure:   
       
         
           
           
               
               
           
         
         wherein:
 x is a molar fraction chosen from 0.1 to 0.9; and 
 y is a molar fraction chosen from 0.1 to 0.9. 
 
       
     
     
         2 . The hydrocarbon-containing mixture of  claim 1 , wherein hydrocarbon-containing mixture has a pH of 7 or less. 
     
     
         3 . The hydrocarbon-containing mixture of  claim 1 , wherein the hydrocarbon material is chosen from naphtha, gasoline, kerosene, diesel, liquefied petroleum gas (LPG), gas oil, residual fuel oil, lubricating oil base stock, petrochemical feedstocks, aromatics, olefins, light ends, reformates, gas oils, or mixtures thereof. 
     
     
         4 . The hydrocarbon-containing mixture of  claim 1 , wherein the hydrocarbon-containing mixture comprises at least 90 wt. %, at least 95 wt. %, at least 99 wt. %, at least 99.5 wt. %, or even at least 99.9 wt. % of the hydrocarbon materials. 
     
     
         5 . The hydrocarbon-containing mixture of  claim 1 , wherein the hydrocarbon-containing mixture comprises from 5 ppm to 100 ppm corrosion inhibitor additive. 
     
     
         6 . The hydrocarbon-containing mixture of  claim 1 , wherein the copolymer is a random copolymer. 
     
     
         7 . The hydrocarbon-containing mixture of  claim 1 , wherein a number average molecular weight of the copolymer is from 500 g/mol to 2000 g/mol. 
     
     
         8 . A method for inhibiting corrosion on a metal surface, the method comprising:
 contacting a hydrocarbon-containing mixture with a metal substrate, wherein the hydrocarbon-containing mixture comprises:
 a hydrocarbon material comprising one or more hydrocarbon species; and 
 a corrosion inhibitor additive, wherein the corrosion inhibitor additive has the structure: 
   
       
         
           
           
               
               
           
         
         
           wherein:
 x is a molar fraction chosen from 0.1 to 0.9; and 
 y is a molar fraction chosen from 0.1 to 0.9. 
 
         
       
     
     
         9 . The method of  claim 8 , wherein the metal substrate is a metal pipe. 
     
     
         10 . The method of  claim 8 , wherein the metal substrate is a metal storage vessel. 
     
     
         11 . The method of  claim 8 , wherein the metal substrate is in a refinery. 
     
     
         12 . The method of  claim 8 , wherein the metal substrate is a refinery crude distillation unit. 
     
     
         13 . The method of  claim 8 , wherein the metal substrate comprises carbon steel, stainless steel, ductile iron, alloy steel, cast iron, copper. 
     
     
         14 . The method of  claim 8 , wherein the hydrocarbon-containing mixture is at a temperature of from 25° C. to 200° C. 
     
     
         15 . The method of  claim 8 , wherein hydrocarbon-containing mixture has a pH of 7 or less. 
     
     
         16 . The method of  claim 8 , wherein the hydrocarbon material is chosen from naphtha, gasoline, kerosene, diesel, liquefied petroleum gas (LPG), gas oil, residual fuel oil, lubricating oil base stock, petrochemical feedstocks, aromatics, olefins, light ends, reformates, gas oils, or mixtures thereof. 
     
     
         17 . The method of  claim 8 , wherein the hydrocarbon-containing mixture comprises at least 90 wt. %, at least 95 wt. %, at least 99 wt. %, at least 99.5 wt. %, or even at least 99.9 wt. % of the hydrocarbon materials. 
     
     
         18 . The method of  claim 8 , wherein the hydrocarbon-containing mixture comprises from 5 ppm to 100 ppm corrosion inhibitor additive. 
     
     
         19 . The method of  claim 8 , wherein the copolymer is a random copolymer. 
     
     
         20 . The method of  claim 8 , wherein a number average molecular weight of the copolymer is from 500 g/mol to 2000 g/mol.