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Low temperature aluminum reduction cell using hollow cathode

United States Patent

August 20, 2002
View the Complete Patent at the US Patent & Trademark Office
A method of producing aluminum in an electrolytic cell containing alumina dissolved in an electrolyte. A plurality of non-consumable anodes are disposed substantially vertically in the electrolyte along with a plurality of monolithic hollow cathodes. Each cathode has a top and bottom and the cathodes are disposed vertically in the electrolyte and the anodes and the cathodes are arranged in alternating relationship. Each of the cathodes is comprised of a first side facing a first opposing anode and a second side facing a second opposing anode. The first and second sides are joined by ends to form a reservoir in the hollow cathode for collecting aluminum therein deposited at the cathode.
Brown; Craig W. (Seattle, WA), Frizzle; Patrick B. (Seattle, WA)
Northwest Aluminum Technologies (Seattle, WA)
09/ 678,238
October 4, 2000
The invention embodied in the subject matter described herein was made during work financed by the following government contracts: Battelle Pacific Northwest National Laboratory Contract #320879-AF2; and Department of Energy Office of Industrial Technologies Contract #DE-FC07-98ID13662