Corrosion inhibitors containing amide surfactants for a fluid
View Patent ↗A method of inhibiting corrosion in a fluid is disclosed. The method comprises: adding to the fluid an effective corrosion inhibiting amount of a synergist, a synergist when H 2 S is present in the fluid, or no synergist when H 2 S is present in the fluid, and a composition comprising specified following formula and optionally salts thereof.
1. A method of inhibiting corrosion of metal surfaces in a fluid comprising: adding to the fluid an effective corrosion inhibiting amount of a synergist, a synergist when H 2 S is present in the fluid, or no synergist when H 2 S is present in the fluid, and a composition comprising the following formula and optionally salts thereof:
wherein R 1 is C n H 2+1 , wherein n=0 to 12; benzyl; acrylate or H;
wherein R 2 is a C 4 to C 22 alkyl;
wherein R 3 is C n H 2n+1 , wherein n=0 to 12; benzyl; or H;
wherein R 4 is C n H 2n+1 , wherein n=0 to 22; or H
wherein X − is an anion, halogen, a carboxylate, or a sulfate and wherein X − is only present when both R 1 and R 3 are present;
wherein Y═(CH 2 ) n , wherein n=1 to 8; and
wherein R 3 and R 1 can not be hydrogen or n=0 at the same time.
2. The method of claim 1 , wherein the fluid comprises water, gas, and optionally liquid hydrocarbon.
3. The method of claim 1 , wherein R 3 is a methyl or an ethyl group.
4. The method of claim 1 , wherein the halogen is chlorine, bromine, or iodine.
5. The method of claim 1 , wherein Y═(CH 2 ) n , wherein n=1 to 4.
6. The method of claim 1 , wherein R 1 is a C 4 -C 8 alkyl.
7. The method of claim 1 , wherein R 2 is a C 6 -C 12 alkyl.
8. The method of claim 1 comprising the following formula:
wherein R 1 is C 4 H 9 , C 6 H 13 , C 8 H 17 , or benzyl
wherein R 2 is a C 8 H 17 , C 12 H 25 , or C 18 H 35 ;
wherein R 3 is CH 3 or C 2 H 5 ;
wherein R 4 is C n H 2n+1 , wherein n=0 to 22; or H
wherein X − is an anion, halogen, a carboxylate, or a sulfate and wherein X − is only present when both R 1 and R 3 are present;
wherein Y═(CH 2 ) n , wherein n=1 to 8; and
wherein R 3 and R 1 can not be hydrogen or n=0 at the same time.
9. The method of claim 8 , where Y═(CH 2 ) n , wherein n is 1 to 2.
10. The method of claim 1 , comprising the following formula and optionally salts thereof:
11. The method of claim 1 comprising the following formula:
12. A method of inhibiting the corrosion of metal surfaces in a fluid comprising adding to the fluid an effective corrosion inhibiting amount of a synergist a synergist when H 2 S is present in the or no synergist when H 2 S is present in the fluid, and a composition produced by reacting an alkyl acrylate with 1-methylpiperazine and then subsequently reacting the resulting product with an amine to form an amide and reacting said amide with an alkyl halide.
13. The method of claim 12 , wherein said amine is oleylamine.
14. The method of claim 12 , wherein the alkyl halide is a 1-bromohexane.
15. The method of claim 1 , wherein the fluid is in an oil field application.
16. The method of claim 1 , wherein the composition further comprises one or more hydrate inhibitors.
17. The method of claim 1 , wherein the composition further comprises one or more thermodynamic hydrate inhibitors, one or more kinetic hydrate inhibitors, one or more anti-agglomerates, or a combination thereof.
18. The method of claim 1 , wherein the composition further comprises one or more asphaltene inhibitors, paraffin inhibitors, corrosion inhibitors, scale inhibitors, emulsifiers, water clarifiers, dispersants, emulsion breakers, or a combination thereof.
19. The method of claim 1 , wherein the composition further comprises one or more polar or nonpolar solvents or a mixture thereof.
20. The method of claim 1 , wherein the composition further comprises one or more solvents selected from isopropanol, methanol, ethanol, heavy aromatic naptha, toluene, ethylene glycol, ethylene glycol monobutyl ether (EGMBE), diethylene glycol monoethyl ether, xylene, kerosene, diesel, isobutanol, heptane, or a combination thereof.