Anti-corrosion formulations that are stable during storage

Patent metadata

Field	Value
Publication number	US-9951428-B2
Application number	US-201414892736-A
Country	US
Kind code	B2
Filing date	May 23, 2014
Priority date	May 27, 2013
Publication date	Apr 24, 2018
Grant date	Apr 24, 2018

Abstract

The present invention relates to formulations for inhibiting the corrosion of the metals used in the oil industry, and more generally in all types of industries for drilling for fossil compounds or ores, such as gas or oil. The corrosion-inhibiting formulations are stable during storage, and have improved properties due to the presence of at least one compound having at least one triazine unit. The invention also relates to the use of at least one compound comprising at least one triazine unit in a corrosion-inhibiting formulation, as well as to the use of said corrosion-inhibiting formulation in the oil, gas and mining industry.

First claim

The invention claimed is:

1. A corrosion-inhibiting formulation comprising:
a) at least one amine or amine derivative,
b) at least one sulfur compound,
c) at least one compound bearing at least one triazine unit, and
d) optionally a solvent or a mixture of two or more solvents,

wherein component b) is selected from the group consisting of compounds bearing at least one —SH group and at least one carboxylic acid (—COOH) and/or alcohol (—OH) group.

2. The formulation as claimed in claim 1 , wherein component a) is selected from the group consisting of amines, ethoxylated amines, amino acids, imidazolines, and also derivatives thereof and salts thereof, fatty amines, fatty amine derivatives, imidazolines substituted with at least one fatty chain, ester amines, ether amines, alkylamines, oxy-alkylated amines, betaines and alkylbetaines, and also N-oxide derivatives of the abovementioned amines.

3. The formulation as claimed in claim 1 , wherein component b) is selected from the group consisting of mercaptoethanol, mercaptopropanol, thioglycolic acid, mercaptoacetic acid, and mercaptopropionic acid.

4. The formulation as claimed in claim 1 , wherein component c) is selected from the group consisting of the compounds of formula (1) below:

in which:
R 1 , R 2 and R 3 , which may be identical or different, are chosen, independently of each other, from a hydrogen atom, a linear or branched alkyl radical comprising from 1 to 6 carbon atoms and optionally substituted with one or more units chosen from hydroxyl (—OH) and alkoxy (—OR), where R represents a linear or branched alkyl radical comprising from 1 to 6 carbon atoms, and
R a , R b and R c , which may be identical or different, are chosen, independently of each other, from a hydrogen atom and a linear or branched alkyl radical comprising from 1 to 6 carbon atoms.

5. The formulation as claimed in claim 4 , wherein component c) is selected from the group consisting of the compounds of formula (1) for which R a , R b and R c each represent a hydrogen atom and R 1 , R 2 and R 3 are not hydrogen atoms.

6. The formulation as claimed in claim 4 , wherein component c) is selected from the group consisting of the compounds of formula (1) for which R 1 , R 2 and R 3 are identical.

7. The formulation as claimed in claim 4 , wherein component (c) is selected from the group consisting of the compounds of formula (1) for which R 1 , R 2 and R 3 are identical and are each selected from the group consisting of a methyl radical, a hydroxyethyl radical and a methoxypropyl radical.

8. The formulation as claimed in claim 1 , wherein the amount of component c) is between 0.5% by weight and 10% by weight, relative to the total weight of the formulation.

9. The formulation as claimed in claim 1 , wherein the compound comprising at least one triazine unit is selected from the group consisting of 1,3,5-trimethylhexahydrotriazine, 1,3,5-tris(hydroxyethyl)hexahydrotriazine and 1,3,5-tri(methoxypropyl)hexahydrotriazine.

10. The formulation as claimed in claim 1 , additionally comprising a component d) which is a solvent or a mixture of two or more solvents.

11. The formulation as claimed in claim 1 , wherein the solvent(s) is (are) selected from the group consisting of water and water-soluble organic solvents.

12. The formulation as claimed in claim 1 , wherein the amount of component c) is between 0.5% and 5% by weight.

13. The formulation as claimed in claim 1 , wherein component c) is a compound bearing only one triazine unit.

14. The formulation as claimed in claim 13 , wherein the triazine unit is a hexahydrotriazine unit.

15. The formulation as claimed in claim 13 , wherein the triazine unit is a 1,3,5-triazine unit.

16. The formulation as claimed in claim 1 , wherein component a) represents from 50% to 90% by weight, limits inclusive, relative to the total weight of components a)+b)+c), component b) represents from 1% to 30% by weight, limits inclusive, relative to the total weight of components a)+b)+c), and component c represents from 0.5% to 15 by weight, limits inclusive, relative to the total weight of components a)+b)+c).

17. A method for treating the corrosion of metal conduits that are corrodable on contact with corrosive media in the oil, gas and mining industry, wherein the method comprises using a corrosion-inhibiting formulation in accordance with claim 1 .

Assignees

• Arkema France

Inventors

• Pou Tong Eak
• Devaux Jean Francois

Classifications

• C23F11/00

  Inhibiting corrosion of metallic material by applying inhibitors to the surface in danger of corrosion or adding them to the corrosive agent (adding inhibitors to mineral oil, fuels, or lubricants C10; adding inhibitors to pickling solutions C23G) · CPC title

• C23F11/10

  using organic inhibitors · CPC title

• C23F11/161

  Mercaptans · CPC title

• C09K8/54

  Compositions for in situ inhibition of corrosion in boreholes or wells · CPC title

• C23F11/149 Primary

  Heterocyclic compounds containing nitrogen as hetero atom · CPC title