Corrosion inhibitors for an aqueous medium
View Patent ↗One or more methods for inhibiting corrosion in an aqueous medium that contain a composition with a specified generic formula are disclosed. The aqueous medium can be contained in an oil or gas pipeline or refinery.
1. A method of inhibiting corrosion in an aqueous medium comprising: adding to the medium an effective corrosion inhibiting amount of a synergist, a synergist when H 2 S is present in the aqueous medium, or no synergist when H 2 S is present in the aqueous medium, and a composition comprising the following formula and optionally salts thereof:
wherein R 1 is C n H 2n+1 , wherein n=0 to 12; benzyl; or H;
wherein R 2 is a C 1 to C 22 alkyl;
wherein R 3 is C n H 2n+1 , wherein n=0 to 12; benzyl; or H;
wherein X − is a halogen or a carboxylate and wherein X − is only present when both R 1 and R 3 are present;
wherein Y=(CH 2 ) n , wherein n is 1 to 8; and
wherein R 3 and R 1 cannot be hydrogen at the same time.
2. The method of claim 1 , wherein the alkyl groups of R 1 and/or R 2 are linear, branched, and/or cyclic.
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 R 1 is a C 4 -C 6 alkyl.
6. The method of claim 1 , wherein R 2 is a C 6 -C 12 alkyl.
7. The method of claim 1 wherein the composition comprises the following formula and optionally salts thereof:
8. The method of claim 1 wherein the composition comprises the following formula:
9. The method of claim 1 wherein the composition comprises the following formula:
10. The method of claim 1 , wherein the composition further comprises one or more hydrate inhibitors.
11. 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-agglomerants, or a combination thereof.
12. 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.
13. The method of claim 1 , wherein the composition further comprises one or more polar or nonpolar solvents or a mixture thereof.
14. 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, EGMBE, diethylene glycol monoethyl ether, xylene, or a combination thereof.
15. A method of inhibiting corrosion in an aqueous medium comprising adding to the medium an effective corrosion inhibiting amount of a synergist and a composition prepared by reacting an alkyl acrylate with 1-methylpiperazine.
16. The method of claim 15 wherein said acrylate is a lauryl acrylate.
17. A method of inhibiting corrosion in an aqueous medium comprising: adding to the medium an effective corrosion inhibiting amount of a synergist, a synergist when H 2 S is present in the aqueous medium, or no synergist when H 2 S is present in the aqueous medium, and a composition comprising the following formula and optionally salts thereof:
wherein R 1 is C n H 2n+1 , wherein n=0 to 12; benzyl; or H;
wherein R 2 is C n H 2n+1 , wherein n=1 to 22;
wherein X =Cl, Br, or I.