| abstract |
In one embodiment, the present invention relates to a process for recovering an onium compound from waste solutions or synthetic solutions containing the onium compound and impurities including the steps: contacting the waste solution or synthetic solution with a metal ion scavenger to remove metal ion impurities, wherein the metal ion scavenger comprises at least one of a chelating compound, a nanoporous material, and a MACS material; charging the waste solution or synthetic solution to an electrochemical cell (10) containing at least two compartments (14, 15), a cathode (12), an anode (11) and a divider (D) and passing a current through the cell whereby the onium compound is regenerated or produced; and recovering the onium compound from the cell. |