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US 12,384,968 B2Granted
Inhibited hydrofluoric acid composition
AssigneeDorf Ketal Chemicals Fze
InventorsClay Purdy, Markus Weissenberger, Karl W. Dawson, Kyle G. Wynnyk
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Abstract
An inhibited hydrofluoric acid aqueous composition, said composition comprising: hydrofluoric acid in solution; and a weak base selected from the group consisting of: lysine, arginine, histidine, glutamine, asparagine, tryptophan, and tyrosine; wherein said weak base and hydrofluoric acid are present in a molar ratio of at least 1:1. Also disclosed is a mud acid using this inhibited acid composition.
Claims5
A method of preparing an inhibited hydrofluoric acid composition, said method consisting of:
- providing a pre-determined amount of hydrofluoric acid;
- providing a weak base selected from the group consisting of glutamine, asparagine, tryptophan and tyrosine;
- adding the weak base into the hydrofluoric acid until the molar ratio of weak base:hydrofluoric acid is at least 1.1:1.
Dependencies are inferred from the claim text.