The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 28, 2004
Filed:
Apr. 27, 2002
Vittorio De Nora, Nassau, BS;
Moltech Invent S.A., , LU;
Abstract
A drained-cathode cell for the electrowinning of aluminium comprises one or more anodes ( ) suspended over one or more cathodes ( ). The or each anode ( ) and cathode ( ) respectively have a sloped V-shaped active anode surface ( ) and parallel sloped inverted V-shaped drained cathode surfaces ( ) facing one another and spaced apart by two sloped inter-electrode gaps ( ), arranged so the electrolyte circulates upwardly in the sloped inter-electrode gaps ( ) assisted by anodically produced gas and then returns from a top part ( ′) to a bottom part ( ″) of each inter-electrode gap ( ) along an electrolyte path ( ). Each electrolyte path ( ) extends through vertical and horizontal passages as follow: a vertical passage ( ) from a top to a lower part of a cathode ( ) and then a horizontal passage ( ) in or under the lower part of the cathode ( ), and/or a horizontal passage ( ) in or on an upper part of an anode ( ) and then a vertical passage ( ) extending from the upper to a bottom part of the anode ( ). Each horizontal passage ( ) extends substantially over the entire horizontal length of a corresponding inter-electrode gap ( ).