Alkylsulfonic acid compositions

Patent metadata

Field	Value
Publication number	US-11293106-B2
Application number	US-201916722170-A
Country	US
Kind code	B2
Filing date	Dec 20, 2019
Priority date	Dec 20, 2018
Publication date	Apr 5, 2022
Grant date	Apr 5, 2022

Abstract

Method of minimizing pitting corrosion at temperatures above 130° C., wherein said method comprises: providing an acidic fluid comprising an alkylsulfonic acid; providing at least one corrosion inhibitor compound comprising an organic compound comprising at least two aldehyde functional groups; combining said acidic fluid with said at least one corrosion inhibitor compound; exposing said mixed fluid to a metallic surface at a temperature of at least 130° C.; and allowing said mixed fluid sufficient time of exposure to a metal to accomplish a pre-determined function.

First claim

The invention claimed is:

1. An alkylsulfonic acid composition comprising an alkylsulfonic acid and a corrosion inhibitor composition, said corrosion inhibitor composition comprising:
an organic compound comprising at least two aldehyde functional groups;
optionally, a propargyl alcohol;
an anionic surfactant which is a dicarboxylic surfactant;
at least one amphoteric surfactant; and
a solvent;

wherein the alkylsulfonic acid is present in an amount ranging from 1 wt % to 50 wt % of the sulfonic acid composition in water.

2. The alkylsulfonic acid composition as claimed in claim 1 , wherein the alkylsulfonic acid is methanesulfonic acid.

3. The alkylsulfonic acid composition as claimed in claim 1 , wherein the at least one amphoteric surfactant is selected from the group consisting of:
a sultaine surfactant; a betaine surfactant; and combinations thereof.

4. The alkylsulfonic acid composition as claimed in claim 1 , wherein at least one amphoteric surfactant is a sultaine surfactant and betaine surfactant and are selected from the group consisting of: an amido betaine surfactant; an amido sultaine surfactant; and combinations thereof.

5. The alkylsulfonic acid composition as claimed in claim 1 , wherein the at least one amphoteric surfactant is an amido betaine surfactant and is selected from the group consisting of: an amido betaine comprising a hydrophobic tail from C8 to C16.

6. The alkylsulfonic acid composition as claimed in claim 1 , wherein the at least one amphoteric surfactant is cocamidobetaine.

7. The alkylsulfonic acid composition as claimed in claim 1 , further comprising an anionic surfactant which is a carboxylic surfactant.

8. The alkylsulfonic acid composition as claimed in claim 1 , wherein said anionic surfactant is a dicarboxylic surfactant comprising a hydrophobic tail ranging from C8 to C16.

9. The alkylsulfonic acid composition as claimed in claim 1 , wherein said anionic surfactant is an iminodicarboxylate including sodium lauriminodipropionate.

10. The alkylsulfonic acid composition as claimed in claim 1 , wherein the surfactant is selected from the group consisting of:
cocamidopropyl betaine;
β-Alanine, N-(2-carboxyethyl)-N-dodecyl-, sodium salt (1:1); and
a combination thereof.

11. The alkylsulfonic acid composition as claimed in claim 1 , wherein the propargyl alcohol is present in an amount ranging from 20% to 55% by volume of the total weight of the corrosion inhibitor composition.

12. The alkylsulfonic acid composition as claimed in claim 1 , wherein the surfactant is present in an amount ranging from 2% to 20% by volume of the total weight of the corrosion inhibitor composition.

13. The alkylsulfonic acid composition as claimed in claim 1 , wherein the solvent is present in an amount ranging from 10% to 45% by volume of the total weight of the corrosion inhibitor composition.

Assignees

• Fluid Energy Group Ltd

Inventors

• Purdy Clay
• Weissenberger Markus

Classifications

• C09K8/68

  containing organic compounds · CPC title

• C09K8/602

  containing surfactants · CPC title

• C23F11/04

  in markedly acid liquids · CPC title

• C09K8/74

  combined with additives added for specific purposes · CPC title

• C09K2208/32

  Anticorrosion additives · CPC title