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:
Nov. 17, 2020
Filed:
Aug. 28, 2018
Applicant:
Polar Sapphire Ltd., Toronto, CA;
Inventors:
Scott Nichol, Toronto, CA;
Daniel Smith, Brampton, CA;
Assignee:
Polar Sapphire Ltd., Toronto, CA;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C01F 17/00 (2020.01); C01F 7/44 (2006.01); C01F 7/30 (2006.01); C01F 7/56 (2006.01); C04B 35/111 (2006.01); C01F 7/02 (2006.01); C01F 7/20 (2006.01); C04B 35/043 (2006.01);
U.S. Cl.
CPC ...
C01F 7/441 (2013.01); C01F 7/023 (2013.01); C01F 7/20 (2013.01); C01F 7/30 (2013.01); C01F 7/56 (2013.01); C04B 35/043 (2013.01); C04B 35/111 (2013.01); C01P 2004/60 (2013.01); C01P 2004/62 (2013.01); C01P 2006/10 (2013.01); C01P 2006/80 (2013.01); C04B 2235/322 (2013.01); C04B 2235/5445 (2013.01); C04B 2235/604 (2013.01); C04B 2235/608 (2013.01); C04B 2235/72 (2013.01); C04B 2235/725 (2013.01); C04B 2235/77 (2013.01);
Abstract
A method comprises reacting an aluminum feedstock with an acid in the presence of water to provide an aluminum salt solution comprising an aluminum salt in water, wherein the aluminum salt comprises a reaction product of the acid and aluminum, and spray roasting the aluminum salt solution at a temperature of at least about 450° C. to provide an aluminum oxide powder, wherein the spray roasting is performed in a furnace lined with a refractory comprising alumina that is at least about 99.2% purity alumina, and wherein the aluminum oxide powder is 99.2% pure aluminum oxide or greater.