Patent ID: 11872528
Assignee: XEROX CORPORATION
Field: Chemical engineering (Chemistry)
Classification: CPC B  C | IPC B  C

Claim 0:
1. An electrochemical system, comprising:
a first reservoir receiving a feed stream, wherein the feed stream comprises a solvent, a salt having a first salt concentration in the feed stream, and a solute different than the salt at a first solute concentration;
a second reservoir receiving a brine stream, the brine stream having a second salt concentration higher than the first salt concentration;
a first electrode contacting a first solution of a first redox-active electrolyte material and configured to have a first reversible redox reaction with the first redox-active electrolyte material, and accept a first ion from the salt in the first reservoir;
a second electrode contacting a second solution of a second redox-active electrolyte material and configured to have a second reversible redox reaction with the second redox-active electrolyte material, and drive a second ion into the brine stream in the second reservoir;
an energy source configured to supply electrical potential to the first and second electrodes;
a first membrane having a first ion exchange type disposed between the first and second reservoirs;
a second membrane having a second ion exchange type, different from the first ion exchange type, disposed between the first electrode and the first reservoir;
a third membrane having the second ion exchange type disposed between the second electrode and the second reservoir;
an effluent stream comprising the solvent and a third salt concentration output from the second reservoir, wherein the solvent is removed from the first reservoir via electroosmosis and forward osmosis; and
a concentrate stream output from the first reservoir, the concentrate stream comprising a fourth salt concentration that is less than the first, second, and third salt concentrations, and a second solute concentration greater than the first solute concentration.