Methods of synthesizing an oxidant and applications thereof

• US 6,790,429 B2
• Filed: 01/14/2002
• Issued: 09/14/2004
• Est. Priority Date: 07/14/2000
• Status: Expired due to Term

• Current Assignee: Ferrate Treatment Technologies Incorporated
• Original Assignee: Ab Initio Lc
• Inventors: Ciampi, Lee Edward
• Primary Examiner(s): BOS, STEVEN J
• Application Number:
  US10/047,460
• Publication Number:
  US 20020155044A1
• Time in Patent Office: 974 Days
• Field of Search: 423/594.1, 423/594.2, 210/716, 210/717, 210/758, 134/2, 134/3, 422/28, 422/29, 205/80, 205/543, 205/548
• US Class Current: 423/594.1
• CPC Class Codes: C01G 49/00 Compounds of iron
• CPC Class Codes: C01G 49/0081 containing iron in unusual valence state [IV, V, VI]
• CPC Class Codes: C01P 2002/84 by UV- or VIS- data
• CPC Class Codes: C01P 2006/60 Optical properties, e.g. expressed in CIELAB-values
• CPC Class Codes: C02F 1/4672 by electrooxydation
• CPC Class Codes: C02F 1/50 by addition or application of a germicide or by oligodynamic treatment C02F1/4606, C02F1/467, C02F1/76 take precedence
• CPC Class Codes: C02F 1/5236 using inorganic agents
• CPC Class Codes: C02F 1/72 by oxidation C02F1/4672 takes precedence
• CPC Class Codes: C02F 2303/04 Disinfection
• CPC Class Codes: C02F 2303/20 Prevention of biofouling

Abstract

Novel methods and devices for synthesizing ferrate and uses thereof are described. One aspect of the invention relates to synthesizing ferrate at a site proximal to the site of use, another aspect of the invention relates to devices and methods for synthesizing ferrate.

Claims

1. A method of continuously synthesizing ferrate, comprising:

a) mixing an iron salt and an oxidizing agent in a mixing chamber to provide a mixture;

b) delivering at least a portion of the mixture to a reaction chamber;

c) continuously generating ferrate in the reaction chamber;

d) delivering at least a portion of the ferrate to a site of use that is proximal to the reaction chamber; and

e) adding additional iron salt and oxidizing agent to the mixing chamber;

wherein said site of use is a site where said ferrate is contacted with an object it is to oxidize, disinfect, clean, plate, encapsulate, or coagulate or is utilized in organic synthesis.

2. The method of claim 1, further comprising adding a base to the mixture.

3. The method of claim 1, additionally comprising repeating steps (b) through (d).

4. The method of claim 1, wherein said additional iron salt and oxidizing agent in step (e) is added in an amount to substantially replace the portion of the mixture delivered to the reaction chamber.

5. The method of claim 2, wherein said base comprises an ion selected from the group consisting of a nitrogen base, the hydroxide ion, the oxide ion, the carbonate ion, and a combination thereof.

6. The method of claim 2, wherein said base is sodium hydroxide.

7. The method of claim 1, wherein said iron salt is selected from the group consisting of ferric nitrate, ferrous nitrate, ferric chloride, ferrous chloride, ferric bromide, ferrous bromide, ferric sulfate, ferrous sulfate, ferric phosphate, ferrous phosphate, ferric hydroxide, ferrous hydroxide, ferric oxide, ferrous oxide, ferric hydrogen carbonate, ferrous hydrogen carbonate, ferric carbonate, ferrous carbonate, and a combination thereof.

8. The method of claim 1, wherein said iron salt is ferric chloride.

9. The method of claim 1, wherein said oxidizing agent comprises at least one of the following:

a hypohalite ion, a halite ion, a halate ion, a perhalate ion, ozone, potassium peroxymonopersulfate, potassium monopersulfate, halogen a peroxide, a peracid, a salt of a peracid, Caro'"'"'s acid, and a combination thereof.

10. The method of claim 1, wherein said oxidizing agent comprises sodium hypochlorite.

11. A method of synthesizing ferrate, comprising:

a) mixing an aqueous solution comprising an iron salt and an oxidizing agent in a mixing chamber to form a solution of ferrate;

b) delivering at least a portion of the solution of ferrate to a site of use that is proximal to the mixing chamber;

wherein said site of use is a site where said ferrate is contacted with an object it is to oxidize, disinfect, clean, plate, encapsulate, or coagulate or is utilized in organic synthesis.

12. The method of claim 11, further comprising adding a base to the aqueous solution.

13. The method of claim 12, wherein said base comprises an ion selected from the group consisting of a nitrogen base, the hydroxide ion, the oxide ion, the carbonate ion, and a combination thereof.

14. The method of claim 11, wherein said iron salt is selected from the group consisting of ferric nitrate, ferrous nitrate, ferric chloride, ferrous chloride, ferric bromide, ferrous bromide, ferric sulfate, ferrous sulfate, ferric phosphate, ferrous phosphate, ferric hydroxide, ferrous hydroxide, ferric oxide, ferrous oxide, ferric hydrogen carbonate, ferrous hydrogen carbonate, ferric carbonate, ferrous carbonate, and a combination thereof.

15. The method of claim 11, wherein said oxidizing agent comprises at least one of the following:

a hypohalite ion, a halite ion, a halate ion, a perhalate ion, ozone, potassium peroxymonopersulfate, potassium monopersulfate, halogen, a peroxide, a peracid, a salt of a peracid, Caro'"'"'s acid, and a combination thereof.

16. The method of claim 11, further comprising adding additional iron salt and oxidizing agent to the mixing chamber in an amount to substantially replace the portion of the aqueous solution delivered to the site of use.