Process to manufacture novel inhibited hydrofluoric acid composition
A process for controlling the heat generated during the manufacture an inhibited hydrofluoric acid aqueous composition comprising: hydrofluoric acid in solution; a weak base; and an alkanolamine; said process comprising the steps of: providing a pre-determined amount of weak base; adding a pre-determined amount of said hydrofluoric acid to said weak base and obtaining a solution; adding said alkanolamine to the resulting solution of hydrofluoric acid and weak base; mixing until all components are dissolved; wherein said alkanolamine and hydrofluoric acid are present in a molar ratio of at least 1:1.
1. A process for controlling the heat generated during the manufacture of an inhibited hydrofluoric acid aqueous composition comprising:
hydrofluoric acid in solution;
a weak base selected from the group consisting of lysine, triazole, imidazole, hydantoin, and n-methylimidazole; and
an alkanolamine;
said process comprising:
providing a pre-determined amount of the weak base;
combining a pre-determined amount of the hydrofluoric acid with the weak base and obtaining a solution;
adding the alkanolamine to the solution of the hydrofluoric acid and the weak base; and
mixing until all components are dissolved;
wherein the alkanolamine and hydrofluoric acid are present in a molar ratio of at least 1:1.
2. The process of claim 1 , wherein the alkanolamine and hydrofluoric acid are present in a molar ratio of at least 1.1:1.
3. The process of claim 1 , wherein the alkanolamine is selected from the group consisting of: monoethanolamine; diethanolamine; triethanolamine and combinations thereof.
4. The process of claim 1 , wherein the alkanolamine is monoethanolamine.
5. The process of claim 1 , wherein the alkanolamine is diethanolamine.
6. The process of claim 1 , wherein the alkanolamine is triethanolamine.
7. The process of claim 1 , wherein the weak base is present in an amount ranging from 0.02 to 0.5 moles for each mole of HF present.
8. The process of claim 1 , wherein the weak base is present in an amount ranging from 0.05 to 0.2 moles for each mole of HF present.
9. The process of claim 1 , wherein the weak base is imidazole.
10. The process of claim 9 , wherein the alkanolamine is monoethanolamine.
11. A process for controlling the heat generated during the manufacture of an inhibited hydrofluoric acid aqueous composition comprising:
hydrofluoric acid in solution;
a weak base selected from the group consisting of lysine, triazole, imidazole, hydantoin, and n-methylimidazole; and
an alkanolamine;
said process comprising:
providing a pre-determined amount of the weak base in solution;
adding a pre-determined amount of the hydrofluoric acid to the solution of weak base;
adding the alkanolamine to the resulting solution of the hydrofluoric acid and the weak base; and
mixing until all components are dissolved;
wherein the alkanolamine and hydrofluoric acid are present in a molar ratio of at least 1:1.