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:
May. 03, 1977
Filed:
Dec. 10, 1975
Kimio Yano, Niihama, JA;
Tadaaki Nagai, Niihama, JA;
Koji Matsumoto, Niihama, JA;
Motokiyo Nagayasu, Niihama, JA;
Junichi Tanaka, Niihama, JA;
Sumitomo Chemical Company, Limited, Osaka, JA;
Abstract
A process for producing aluminum by electrolyzing aluminum oxide dissolved in a molten salt bath using a Soderberg anode with vertical contact studs, wherein a molded anode paste having a composition that does not form a soup-like or liquid layer is used, and the electrolysis is carried out while maintaining the anode such that it forms three layers, an upper layer of the anode comprising the molded anode paste which exerts a specific load on lower layers of the anode and has a specific surface temperature, an unbaked interlayer which, for a period of time after pulling out the contact studs does not clog the holes left upon the removal of the studs, and a lower baked layer. The anode has a high apparent density and superior mechanical strength and electrical characteristics, and the process can provide aluminum at low unit production costs for the electrode and electric power without suffering from anode troubles.