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. 20, 1980
Filed:
Aug. 24, 1978
Applicant:
Inventor:
Alfred Lippman, Metairie, LA (US);
Assignee:
Toth Aluminum Corporation, New Orleans, LA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C01F / ;
U.S. Cl.
CPC ...
423625 ; 2331 / ; 264 66 ; 264109 ;
Abstract
A method for the consolidation of fine alumina particles, like those made by the dry oxidation of aluminum chloride, to produce a metallurgical grade alumina that resembles Bayer alumina in the following properties; dissolving as well in a Hall cell; absorption of water; absorption of hydrogen fluoride gas to eliminate that contaminant from the Hall cell offgases in a fluid bed; bulk density; particle size distribution; purity and handling. The method comprises the uniform admixture of caustic soda solution, compressing, autoclaving, then drying and calcining the mass; finally crushing and screening the solid product with recycling of the fines.