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:
Jun. 12, 2001
Filed:
Aug. 03, 1999
Applicant:
Inventor:
John S. Rendall, Albuquerque, NM (US);
Assignee:
Other;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C25C 3/00 ;
U.S. Cl.
CPC ...
C25C 3/00 ;
Abstract
The aluminum smelting from alumina in the Hall-Heroult cells can be dramatically improved by using one or a combination of the following features together or in alternative to the Bayer alumina as feedstock: Al,alumina, sawtooth shaped electrodes, and lower temperatures. Laboratory experiments have shown that higher rates of dissolution of the Al,alumina in molten fluoride baths combined with lower voltage drops and improved design of electrodes can allow the operation of the cells at even higher current density, thus increasing overall productivity and efficiency of the cells.