Granted Patent B2

US 8,758,631 · App. 13/107,480 · Granted Jun 24, 2014

Abstract

Claims (26)

1. A method for decontaminating a liquid, wherein the liquid comprises reactive sulfides, the method comprising:

(A) preparing a stabilized sodium percarbonate solution, wherein the preparing comprises adding sodium percarbonate to a liquid solution, and wherein the liquid solution comprises a peroxide stabilizer and an acid; and

(B) dosing the liquid into the stabilized sodium percarbonate solution to decontaminate the liquid by oxidizing at least a portion of the reactive sulfides, wherein the reactive sulfides comprise a pyrophoric iron sulfide.

2. The method of claim 1 , wherein the reactive sulfides comprise hydrogen sulfide.

3. The method of claim 1 , further comprising allowing the sodium percarbonate and the liquid solution to mix for a time period from about one hour to about two hours.

4. The method of claim 1 , wherein the sodium percarbonate comprises a coating.

5. The method of claim 1 , wherein the peroxide stabilizer comprises tartrazine, nitrilotrimethylenephosphonate, or any combinations thereof.

6. The method of claim 1 , wherein the peroxide stabilizer comprises tartrazine.

7. The method of claim 1 , wherein the acid comprises citric acid, phosphoric acid, or any combinations thereof.

8. The method of claim 1 , wherein the liquid solution comprises from about 0.01 wt. % to about 0.5 wt. % of peroxide stabilizer.

9. The method of claim 1 , wherein the liquid solution comprises a sufficient amount of the acid to maintain the pH of the liquid solution from about 5.5 pH to about 6.5 pH.

10. The method of claim 1 , further comprising dosing the liquid into the stabilized sodium percarbonate solution for a time period less than about three hours.

11. A method for decontaminating a liquid through exposure to a prepared stabilized sodium percarbonate solution, the method comprising:

(A) adding sodium percarbonate to a liquid solution, wherein the liquid solution comprises a peroxide stabilizer and an acid;

(B) allowing the sodium percarbonate and the liquid solution to mix for a time period to prepare the stabilized sodium percarbonate solution;

(C) adding the stabilized sodium sercarbonate solution to a mix tank; and

(D) adding the liquid to the mix tank over a time period of less than 3 hours, wherein the liquid comprises a pyrophoric iron sulfide.

12. The method of claim 11 , wherein the sodium percarbonate comprises a coating.

13. The method of claim 12 , wherein the coating comprises a sodium silicate.

14. The method of claim 11 , wherein the peroxide stabilizer comprises tartrazine, nitrilotrimethylenephosphonate, or any combinations thereof.

15. The method of claim 11 , wherein the peroxide stabilizer comprises tartrazine.

16. The method of claim 11 , wherein the acid comprises citric acid, phosphoric acid, or any combinations thereof.

17. The method of claim 11 , wherein the liquid solution comprises from about 0.01 wt. % to about 0.5 wt. % of peroxide stabilizer.

18. The method of claim 11 , wherein the liquid solution comprises a sufficient amount of the acid to maintain the pH of the liquid solution from about 5.5 pH to about 6.5 pH.

19. The method of claim 11 , further comprising allowing the sodium percarbonate and the liquid solution to mix for a time period from about one hour to about two hours.

20. The method of claim 11 , wherein the liquid solution comprises from about 4.0 vol. % phosphoric acid to about 8.0 vol. % phosphoric acid.

Assignments (8)