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:
Feb. 01, 2011
Filed:
Jun. 03, 2005
Applicants:
Odd-arne Lorentsen, Porsgrunn, NO;
Stein Julsrud, Skien, NO;
Christian Rosenkilde, Porsgrunn, NO;
Inventors:
Assignee:
Norsk Hydro ASA, Oslo, NO;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C25C 3/08 (2006.01); C25C 3/14 (2006.01);
U.S. Cl.
CPC ...
Abstract
The present invention relates to a method of improving the current efficiency (CE) in an electrolytic aluminum production cell with an electrolytic bath, at least one anode and at least one cathode, and passing current between said anode and said cathode through said bath and feeding an aluminum containing feedstock to the cell. The CE is improved in that the aluminum containing feedstock is prepared in a manner where it contains substantially no humidity or water before it is fed to the cell, where the electrolytic process is carried out at conditions with reduced amount of hydrogen present.