| 摘要 |
To prevent biological fouling in an electrodialysis device, a membrane electrolysis stack and an electrodialysis device including this membrane electrolysis stack are created. The electrodialysis device preferably serves for the regeneration of an electroless plating bath, for example a nickel plating bath. It comprises at least one anode An and at least one cathode Ca as well as respectively a membrane electrolysis stack arranged between an anode An and a cathode Ca, every membrane electrolysis stack comprising membranes stacked on top of each other and respectively electrolyte compartments arranged therebetween, at least one first and at least one second membrane alternating in succession in the membrane electrolysis stack. At least one first membrane is selected from a group comprising an anion exchange membrane A and a bipolar membrane BP, and at least one second membrane is selected from a group comprising a monoselective anion exchange membrane MSA, a monoselective cation exchange membrane CSA and a proton-selective exchange membrane, with the proviso that the at least one first membrane and at least one second membrane in the membrane electrolysis stacks are respectively selected independently of each other and that at least one first membrane in the membrane electrolysis stack is a bipolar membrane BP. Furthermore, it is provided that the electrolyte compartments located on the cathode side to the at least one first membrane are diluate compartments Di1, Di2 in which the electrolyte to be regenerated is contained, and that the electrolyte compartments located on the cathode side to the at least one second membrane are concentrate compartments Co1, Co2, Co3 in which interfering ions taken up from the electrolytes to be regenerated are contained. |
