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:
Aug. 20, 2002
Filed:
Aug. 11, 2000
Vittorio de Nora, Nassau, BS;
Jean-Jacques Duruz, Geneva, CH;
Moltech Invent S.A., Luxembourg, LU;
Abstract
An electrolytic cell for the electrowinning of aluminium comprises a cathode cell bottom provided with a series of sloped active cathode surfaces ( ) down which produced aluminium ( ) is drained, and a series of recessed grooves or channels ( ), below the bottom of the cathode active surfaces ( ) and extending therealong which collect and evacuate the drained produced aluminum ( ). Preferably the active surfaces ( ) are V-shaped and the recessed grooves or channels ( ) are provided with a sloping bottom and a constant cross-sectional area. Alumina is so fed into the cell as to supply alumina-rich electrolyte ( ) into the recessed grooves or channels ( ) which contain the alumina-rich electrolyte along substantially their entire length above the drained layer of aluminium ( ). The recessed grooves or channels ( ) supply the alumina-rich electrolyte ( ) to the bottom part of the active cathode surfaces ( ) under the effect of the electrolyte circulation produced by propelling gas ( ) released under the anodes.