Membrane-based critical minerals purification system

Patent metadata

Field	Value
Publication number	US-12241171-B2
Application number	US-202318122590-A
Country	US
Kind code	B2
Filing date	Mar 16, 2023
Priority date	Mar 16, 2023
Publication date	Mar 4, 2025
Grant date	Mar 4, 2025

Abstract

The presently disclosed concepts relate to improved techniques for critical mineral extraction, purification, precipitation, ion exchange, and metal production using a solid electrolyte membrane. By using a solid electrolyte embedded in a matrix, alkali metal (such as lithium) can be more effectively separated from feed solutions. Additionally, energy used to initially extract critical minerals from a feed solution may be stored as electrochemical energy, which in turn, may be discharged when critical minerals are depleted from the electrode. This discharged energy may therefore be reclaimed and reused to extract additional critical minerals.

First claim

What is claimed is:

1. A critical minerals purification system, comprising:
an anode;
a cathode, wherein the anode is configured for oxidation and the cathode is configured for reduction, and wherein migration of a predetermined alkali metal ion through an ion-selective solid electrolyte membrane is driven by a current across the anode and the cathode, wherein the ion-selective solid electrolyte membrane is selectively permeable to the predetermined alkali metal ion, and wherein:
the ion-selective solid electrolyte membrane is configured to allow passage of the predetermined alkali metal ion through at least one pore of only a single particle of the ion-selective solid electrolyte membrane wherein the passage is based on capacitive adsorption, and
a structure of a crystal lattice of the ion-selective solid electrolyte membrane is based on an activation energy;

at least one active material;
a precursor solution comprising the predetermined alkali metal ion, wherein the precursor solution is characterized by a first purity with respect to an alkali metal salt; and
a second solution comprising the migrated predetermined alkali metal ion, wherein the second solution is characterized by a second purity with respect to the alkali metal salt.

2. The critical minerals purification system of claim 1 , wherein the second purity is greater than the first purity.

3. The critical minerals purification system of claim 1 , wherein the at least one active material at the anode includes at least one:
H2, Na+, Li metal, LFP, LMO, NCA, NMC, graphite,
Na-based active materials including Prussian Blue,
ferricyanide, ferrocyanide, or a redox state ferricyanide or ferrocyanide ([Fe(CN)6]3-/[Fe(CN)6]4-),
ferrocene (Fe(C5H5)2, ferrocenium Fe(C5H5)2+, cobaltocene (Co(C5H5)2, cobaltocenium Co(C5H5)2+, or any organic derivatives thereof,
vanadium-containing ions or vanadium coordination complexes, including one or more of pervanadyl (VO2+), vanadyl (VO2+), V2+, V3+,
phosphotungstic acid, or a redox state of phosphotungstic acid ([PW12O40]3-/[P2W21O71]6-/[PW11O39]7-, etc.),
phosphomolybdic acid, or a redox state of phosphomolybdic acid,
silicotungstic acid, or a redox state of slicotungstic acid, or
an ion of any common redox state of Fe, Co, Ni, or Cu, including one or more of Fe2+, Fe3+, Co2+, Co3+, Ni2+, Ni3+, Cu2+, Cu+, or any coordination complex thereof.

4. The critical minerals purification system of claim 1 , wherein the at least one active material at the cathode includes at least one:
H2, Na+, Li metal, LFP, LMO, NCA, NMC, graphite,
Na-based active materials including Prussian Blue,
ferricyanide, ferrocyanide, or a redox state ferricyanide or ferrocyanide ([Fe(CN)6]3-/[Fe(CN)6]4-),
ferrocene (Fe(C5H5)2, ferrocenium Fe(C5H5)2+, cobaltocene (Co(C5H5)2, cobaltocenium Co(C5H5)2+, or any organic derivatives thereof,
vanadium-containing ions or vanadium coordination complexes, including one or more of pervanadyl (VO2+), vanadyl (VO2+), V2+, V3+,
phosphotungstic acid, or a redox state of phosphotungstic acid ([PW12O40]3-/[P2W21O71]6-/[PW11O39]7-, etc.),
phosphomolybdic acid, or a redox state of phosphomolybdic acid,
silicotungstic acid, or a redox state of slicotungstic acid, or
an ion of any common redox state of Fe, Co, Ni, or Cu, including one or more of Fe2+, Fe3+, Co2+, Co3+, Ni2+, Ni3+, Cu2+, Cu+, or any coordination complex thereof.

5. The critical minerals purification system of claim 1 , wherein the ion-selective solid electrolyte membrane is the at least one active material.

6. The critical minerals purification system of claim 1 , wherein the second solution includes H2, wherein the H2 is an output of the reduction of the cathode.

7. The critical minerals purification system of claim 6 , wherein the precursor solution includes H 2 , wherein the H 2 is an input of the oxidation of the anode.

8. The critical minerals purification system of claim 1 , wherein the anode uses a first active material, the cathode uses a second active material, wherein the first active material differs from the second active material, and wherein energy lost to the output of the reduction is regained by the input of the oxidation.

9. The critical minerals purification system of claim 1 , wherein the precursor solution is in contact with the anode.

10. The critical minerals purification system of claim 9 , wherein the precursor solution includes LiOH.

11. The critical minerals purification system of claim 1 , wherein the second solution is in contact with the cathode.

12. The critical minerals purification system of claim 11 , wherein the second solution includes H2O.

13. The critical minerals purification system of claim 12 , wherein the H2O function as a reagent and a solvent.

14. The critical minerals purification system of claim 1 , wherein the alkali metal salt is extracted from the second solution.

15. The critical minerals purification system of claim 14 , wherein the extracted alkali metal salt at the second purity is used for battery components.

16. The critical minerals purification system of claim 1 , further comprising a reagent added to the second solution, wherein the reagent is configured to cause the migrated predetermined alkali metal ion to combine with a hydroxyl group to form the alkali metal salt at the second purity.

17. The critical minerals purification system of claim 16 , wherein the precursor solution includes at least one of lithium minerals, lithium-containing brines, recycled lithium batteries, or seawater.

18. The critical minerals purification system of claim 1 , wherein input energy used to migrate the predetermined alkali metal ion is saved and recovered, at least in part, as electrochemical energy of the migrated predetermined alkali metal ion at the cathode.

19. The critical minerals purification system of claim 18 , wherein the input energy corresponds with an electric charge process and the electrochemical energy corresponds with an electric discharge process.

20. The critical minerals purification system of claim 18 , wherein the recovery of the input energy reduces a carbon footprint of a manufacturing facility.

21. The critical minerals purification system of claim 1 , wherein the passage is not configured based on a crystal structure of the ion-selective solid electrolyte membrane.

22. The critical minerals purification system of claim 1 , wherein the ion-selective solid electrolyte membrane is based on a barrier for diffusion for the predetermined alkali metal ion through a crystal lattice of the ion-selective solid electrolyte membrane.

23. The critical minerals purification system of claim 1 , wherein the activation energy is for the predetermined alkali metal ion.

24. The critical minerals purification system of claim 1 , wherein the activation energy is for at least one of: Li+, Na+, or K+.

25. A critical minerals purification system, comprising:
an anode;
a cathode, wherein the anode is configured for oxidation and the cathode is configured for reduction, and wherein migration of a predetermined alkali metal ion through an ion-selective solid electrolyte membrane is driven by a current across the anode and the cathode, wherein the ion-selective solid electrolyte membrane is selectively permeable to the predetermined alkali metal ion, and wherein:
the ion-selective solid electrolyte membrane is configured to allow passage of the predetermined alkali metal ion through at least o

Assignees

• Lyten Inc

Inventors

• Baucom Jesse
• Kolli Sanjeev

Classifications

• C25C7/02 Primary

  Electrodes (consumable anodes for the refining the metals C25C1/00 - C25C5/00); Connections thereof · CPC title

• C25C1/02 Primary

  of light metals · CPC title