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:
Jan. 28, 1986
Filed:
Oct. 24, 1984
Applicant:
Inventor:
Bohdan Lisowyj, Omaha, NE (US);
Assignee:
InterNorth, Inc., Omaha, NE (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C01G / ; C01G / ; C01F / ;
U.S. Cl.
CPC ...
423 81 ; 423 82 ; 423 85 ; 423127 ; 423132 ; 423140 ; 423150 ;
Abstract
A method is disclosed for the recovery of iron, aluminum and titanium from coal ash. The method comprises magnetically extracting magnetite from the ash, leaching the ash with a solution of a mineral acid, precipitating and removing titanium and iron hydroxides from the leach solution by adding thereto a solution of a strong base, and precipitating and removing aluminum hydroxide by contacting the remaining solution with carbon dioxide or aluminum hydroxide seeding.