Patent ID: 11964885
Assignee: WISCONSIN ALUMNI RESEARCH FOUNDATION
Field: Chemical engineering (Chemistry)
Classification: CPC C  B | IPC B  C

Claim 0:
1. A method for extracting and recovering dissolved ions from solution, the method comprising:
circulating a first solution comprising a reduced species and an oxidized species of a first redox couple between one or more anode compartments of one or more ion-extraction electrodialysis cells and one or more cathode compartments of one or more ion-recovery electrodialysis cells;
circulating a second solution comprising a reduced species and an oxidized species of a second redox couple between one or more cathode compartments of the one or more ion-extraction electrodialysis cells and one or more anode compaitinents of the one or more ion-recovery electrodialysis cells, wherein the first and second redox couples are different redox couples;
oxidizing the reduced species of the first redox couple in the one or more anode compartments of the one or more ion-extraction electrodialysis cells and reducing the oxidized species of the second redox couple in the one or more cathode compartments of the one or more ion-extraction electrodialysis cells, thereby causing anions from an ion-containing solution in an ion-extraction compartment of each of the one or more ion-extraction electrodialysis cells to move into the anode compartment of the ion-extraction electrodialysis cell and cations from the ion-containing solution to move into the cathode compaitinent of the ion-extraction electrodialysis cell; and
reducing the oxidized species of the second redox couple in the one or more cathode compartments of the one or more ion-recovery electrodialysis cells and oxidizing the reduced species of the first redox couple in the one or more anode compai inents of the one or more ion-recovery electrodialysis cells, thereby causing anions from the anode compartment of each of the one or more ion-recovery electrodialysis cells to move into an ion-recovery compartment of the ion-recovery electrodialysis cell and cations from the cathode compartment of each of the one or more ion-recovery electrodialysis cells to move into the ion-recovery compaitment of the ion-recovery electrodialysis cell.