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:
Sep. 09, 1980
Filed:
Dec. 26, 1978
Applicant:
Inventors:
Robert K Dawless, Monroeville, PA (US);
Robert E Graziano, Arnold, PA (US);
Arthur A Bonarett, Creighton, PA (US);
Assignee:
Aluminum Company of America, Pittsburgh, PA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C22B / ;
U.S. Cl.
CPC ...
75 6 / ; 75 63 ; 75 9 / ; 75 1 / ;
Abstract
An improved fractional crystallization process for the purification of aluminum is provided which comprises supplying at least a portion of the heat to the fractional crystallization apparatus adjacent the bottom of the apparatus. Impure, molten aluminum is removed from the apparatus by an upper exit port. After initial crystallization of the purified aluminum and removal of at least a portion of the impure molten aluminum, the crystals may be remelted for purposes of recovering purified aluminum.