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. 08, 1983
Filed:
Dec. 21, 1981
Applicant:
Inventor:
Paul J The, Murrysville, PA (US);
Assignee:
Aluminum Company of America, Pittsburgh, PA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C02F / ;
U.S. Cl.
CPC ...
210665 ; 210673 ; 210688 ; 210777 ; 210807 ; 210506 ; 210912 ; 423 37 ; 423101 ;
Abstract
A Bayer process solution is filtered through a bed of particles of a granular substance containing Fe.sub.2 O.sub.3 to remove copper and zinc species from the solution. The particles preferably have an Fe.sub.2 O.sub.3 content of about 40 to 100% by weight. For more effective removal of zinc, the particles are coated with a metal sulfide, preferably zinc sulfide.