Stable nitric acid blends and uses thereof
A modified aqueous acid composition comprising: nitric acid; sulfuric acid; a compound comprising an amine moiety and a sulfonic acid moiety; and a peroxide. Also disclosed are methods of using such composition.
1. A modified aqueous acid composition consisting of:
nitric acid;
sulfuric acid;
a compound having an amine moiety and a sulfonic acid moiety;
a peroxide; and water.
2. The modified aqueous acid composition according to claim 1 , wherein the peroxide and said compound having an amine moiety and a sulfonic acid moiety are present in a molar ratio of no more than 5:1 and no less than 1:3.
3. The composition according to claim 1 , wherein said compound having an amine moiety and a sulfonic acid moiety is selected from the group consisting of: taurine and taurine derivatives.
4. The composition according to claim 1 , wherein said compound having an amine moiety and a sulfonic acid moiety is a taurine derivative and is selected from the group consisting of: taurolidine; taurocholic acid; tauroselcholic acid; tauromustine; 5-taurinomethyluridine and 5-taurinomethyl-2-thiouridine; homotaurine; acamprosate; and taurates.
5. The composition according to claim 1 , wherein said compound having an amine moiety and a sulfonic acid moiety is taurine.
6. The composition according to claim 1 , wherein the peroxide is selected from the group consisting of: hydrogen peroxide; benzoyl peroxide; percarbonates; perborates; persulfates; and combinations thereof.
7. An aqueous composition for use in the removal of calcium oxalate scale, wherein said composition consists of:
nitric acid in an amount ranging from 2 to 10 wt % of the total weight of the composition;
sulfuric acid in an amount ranging from 0.5 to 10 wt % of the total weight of the composition;
a compound having an amine moiety and a sulfonic acid moiety selected from the group consisting of: taurine and taurine derivatives in an amount ranging from 0.2 to 10 wt % of the total weight of the composition;
a peroxide in an amount ranging from 0.5 to 20 wt % of the total weight of the composition; and water.
8. The composition according to claim 7 for use in the removal of calcium oxalate scale,
wherein the total molar ratio of peroxide to nitric acid, sulfuric acid and sulfonic acid moiety ranges from
1:5 to 5:1.
9. The composition according to claim 7 , wherein the total molar ratio of peroxide to nitric acid, sulfuric acid and sulfonic acid moiety ranges from 1:3 to 3:1.
10. The composition according to claim 7 , wherein the total molar ratio of peroxide to nitric acid, sulfuric acid and sulfonic acid moiety ranges from 1:1 to 2:1.
11. The composition according to claim 7 , wherein said compound having an amine moiety and a sulfonic acid moiety is a taurine derivative and is selected from the group consisting of: taurolidine; taurocholic acid; tauroselcholic acid; tauromustine; 5-taurinomethyluridine and 5-taurinomethyl-2-thiouridine; homotaurine; acamprosate; and taurates.
12. The composition according to claim 7 , wherein said compound having an amine moiety and a sulfonic acid moiety is taurine.
13. The composition according to claim 7 , wherein the peroxide is hydrogen peroxide.
14. A peroxide-containing composition consisting of:
nitric acid;
sulfuric acid;
a compound having an amine moiety and a sulfonic acid moiety selected from the group consisting of: taurine and derivatives thereof;
a source of peroxide;
water; and
wherein said peroxide-containing composition has a pH of at least 1 and a peroxide content of at least 75% of the initial peroxide concentration after 45 days.
15. The peroxide-containing composition according to claim 14 , wherein said composition has a pH of at least 1 and a peroxide content of at least 95% after 14 days.
16. The peroxide-containing composition according to claim 14 , wherein said composition has a pH of at least 1 and a peroxide content of at least 90% after 20 days.