Metal-organic frameworks for removal of iodine oxy-anion

Patent metadata

Field	Value
Publication number	US-12447461-B2
Application number	US-202017639786-A
Country	US
Kind code	B2
Filing date	Sep 3, 2020
Priority date	Sep 4, 2019
Publication date	Oct 21, 2025
Grant date	Oct 21, 2025

Abstract

The present invention provides for the use of a metal-organic framework (MOF) in removing particular chemical species or compounds, in particular oxy-anions of iodate, from a liquid or liquid stream. In some embodiments, the MOF is a Zr-based MOF, such as NU-1000 or MOF-808. The Zr-based MOF, including NU-1000 or MOF-808 can be used to remove these oxy-anions from various liquid streams or liquids in industrial processes such as a nuclear and fossil fuel power plants.

First claim

What is claimed is:

1. A method for reducing the concentration of an oxy-anion of iodine from a liquid stream, comprising:
contacting a liquid stream comprising an oxy-anion of iodine with a zirconium-based metal-organic framework, wherein the zirconium-based metal-organic framework comprises MOF-808; and
complexing the oxy-anion of iodine with the zirconium-based metal-organic framework, thereby reducing the concentration of the oxy-anion of iodine in the liquid stream in a nuclear power plant.

2. The method of claim 1 , wherein said contacting is performed using a demineralizer.

3. The method of claim 1 , wherein the zirconium-based metal-organic framework is disposed on a substrate.

4. The method of claim 3 , wherein the substrate comprises a plurality of polypropylene beads.

5. The method of claim 3 , wherein the substrate comprises a macroscopic fabric.

6. The method of claim 3 , wherein the substrate comprises a molecular fabric comprising organic strands.

7. The method of claim 1 , wherein the MOF-808 is not activated.

8. The method of claim 1 , further comprising activating the MOF-808 prior to said contacting.

9. The method of claim 1 , wherein the oxy-anion comprises iodate.

10. The method of claim 1 , wherein said complexing comprises η 2 μ 2 binding.

11. A method for reducing the concentration of an oxy-anion of iodine from a liquid stream, comprising:
contacting a liquid stream comprising an oxy-anion of iodine with a zirconium-based metal-organic framework, wherein the zirconium-based metal-organic framework comprises MOF-808; and
complexing the oxy-anion of iodine with the zirconium-based metal-organic framework, thereby reducing the concentration of the oxy-anion of iodine in the liquid stream.

12. The method of claim 11 , wherein the liquid stream comprises a liquid stream from a nuclear power plant.

13. The method of claim 12 , wherein said contacting is performed using a demineralizer.

14. The method of claim 12 , wherein the zirconium-based metal-organic framework is disposed on a substrate.

15. The method of claim 14 , wherein the substrate comprises a plurality of polypropylene beads.

16. The method of claim 14 , wherein the substrate comprises a macroscopic fabric.

17. The method of claim 14 , wherein the substrate comprises a molecular fabric comprising organic strands.

18. The method of claim 11 , further comprising activating the MOF-808 prior to said contacting.

19. The method of claim 11 , wherein the oxy-anion comprises iodate.

20. The method of claim 11 , wherein the complexing comprises η 2 μ2 binding.

Assignees

• Electric Power Res Institute Inc

Inventors

• Frattini Paul L
• Fruzzetti Keith Paul
• Howarth Ashlee J

Classifications

• C02F2101/12

  Halogens or halogen-containing compounds · CPC title

• C02F2101/006

  Radioactive compounds · CPC title

• C02F1/288

  using composite sorbents, e.g. coated, impregnated, multi-layered · CPC title

• C02F1/285

  using synthetic organic sorbents · CPC title

• B01J20/3293

  Coatings on a core, the core being particle or fiber shaped, e.g. encapsulated particles, coated fibers · CPC title