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US 11,920,081 B2Granted
Modified acid compositions as alternatives to conventional acids in the oil and gas industry
AssigneeDorf Ketal Chemicals Fze
InventorsClay Purdy, Markus Weissenberger
Life of this patent
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Abstract
An aqueous modified acid composition for industrial activities, said composition comprising: an alkanolamine and strong acid in a molar ratio of not less than 1:15, preferably not less than 1:10; it can also further comprise a metal iodide or iodate. Said composition demonstrates advantages over known conventional acids and modified acids.
Claims20
A method of use of a modified acid composition comprising:
- providing an aqueous modified acid composition comprising a mineral acid and an alkanolamine in a molar ratio ranging from 3:1 to not more than 15:1 and having a pH of less than 1;
- contacting a surface of the aqueous modified acid composition;
- allowing the aqueous modified acid composition to act upon said surface;
- removing the acid composition when an exposure time has been determined to be sufficient for the operation to be complete or sufficiently complete;
- and
- wherein said method of use includes at least one of etching concrete or cleaning concrete from equipment and buildings.
3 more elements
A method of use of a modified acid composition comprising:
- providing an aqueous modified acid composition comprising a mineral acid and an alkanolamine in a molar ratio ranging from 3:1 to not more than 15:1 and having a pH of less than 1;
- contacting a surface of the aqueous modified acid composition;
- allowing the aqueous modified acid composition to act upon said surface;
- removing the acid composition when an exposure time has been determined to be sufficient for the operation to be complete or sufficiently complete;
- and
- wherein said method of use includes at least one of descaling pipelines and related equipment or descaling facilities.
3 more elements
Dependencies are inferred from the claim text.