Polarity reversal electrodes

Details Polarity reversal electrodes Polarity reversal electrodes

1982-07-06

1984-07-24

Niebling, John F.

Chemistry: electrical and wave energy

Apparatus

Coating, forming or etching by sputtering

B01D 1302

Patent

active

044616937

ABSTRACT:
A polarity reversing electrodialysis membrane stack containing a composite electrode at each end of the stack with each electrode having anode and cathode portions electrically insulated from each other. Current is supplied to the anode portion of one electrode and to the cathode portion of the other electrode with means for maintaining a trickle of current from the active anode of one electrode to the inactive anode of the other electrode. Upon reversal of stack polarity the electrodes change their polarities and the trickle currents runs to the other electrode. The invention also is directed to the use of noble metal coated electrodes wherein the coating covers substantially less than the total electrode surface which is in contact with electrolytic solution during use.

REFERENCES:
patent: 3117023 (1964-01-01), Tirrell
patent: 3291716 (1966-12-01), Cioffi
patent: 3453201 (1969-07-01), Mihara
patent: 4169775 (1979-10-01), Kuo
patent: 4197169 (1980-04-01), Zahn

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