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:
Apr. 28, 1987
Filed:
Sep. 10, 1986
Applicant:
Inventor:
Donald K Grubbs, Rector, PA (US);
Assignee:
Aluminum Company of America, Pittsburgh, PA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C01F / ;
U.S. Cl.
CPC ...
423121 ; 423127 ;
Abstract
A process is disclosed for purifying gibbsitic alumina-rich ore of high silica content including admixing the ore with an aqueous digestion solution high in silica concentration. In one aspect the digestion is performed with high alumina and soda concentration at low temperature, e.g., such as by atmospheric digestion.