Phillip J O'Donnell

US Patent:

40367266, Jul 19, 1977

Filed:

Feb 2, 1976

Appl. No.:

5/654563

Inventors:

Stephen B. Gale - Williamsville NY
Phillip P. O'Donnell - Buffalo NY
Stanley Bruckenstein - Williamsville NY

Assignee:

Andco Incorporated - Buffalo NY

International Classification:

C02B 182
C02C 512
C25C 700
C25C 702

US Classification:

204231

Abstract:

Contaminating ions are removed from an aqueous medium, e. g. hexavalent chromium ions from cooling tower waters, by an electrochemical method which includes formation of an insoluble iron compound or complex of the contaminant ion, utilizing an anode of iron, iron alloy or insoluble iron compound. The electrodes are treated with an acid solution at regular intervals to remove any substances formed on or lodged between the electrodes. The electrolytic cell includes a plurality of closely spaced generally parallel plate electrodes with electric potential applied to the two end electrodes, and an electrode near each end electrode is of a size protecting the end electrode from flux field effects.

US Patent:

41233395, Oct 31, 1978

Filed:

Feb 7, 1975

Appl. No.:

5/547940

Inventors:

Stephen B. Gale - Williamsville NY
Phillip P. O'Donnell - Buffalo NY
Stanley Bruckenstein - Williamsville NY

Assignee:

Andco Industries, Inc. - Buffalo NY

International Classification:

C02C 512

US Classification:

204149

Abstract:

Contaminating ions are removed from an aqeuous medium, e. g. hexavalent chromium ions from cooling tower waters, by an electrochemical method which includes formation of an insoluble iron compound or complex of the contaminant ion, utilizing an anode of iron, iron alloy or insoluble iron compound. The electrodes are treated with an acid solution at regular intervals to remove any substances formed on or lodged between the electrodes. The electrolytic cell includes a plurality of closely spaced generally parallel plate electrodes with electric potential applied to the two end electrodes, and an electrode near each end electrode is of a size protecting the end electrode from flux field effects.