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:
Aug. 26, 1980
Filed:
Oct. 27, 1978
Applicant:
Inventors:
Jussi K Rastas, Pori, FI;
Sigmund P Fugleberg, Pori, FI;
Seppo O Heimala, Pori, FI;
Sitg-Erik Hultholm, Pori, FI;
Jaakko T Poijarvi, Vanha-Ulvila, FI;
Assignee:
Outokumpu Oy, Helsinki, FI;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C22B / ; C22B / ; C22B / ; C22B / ;
U.S. Cl.
CPC ...
7510 / ; 75115 ; 75117 ; 75120 ; 75121 ; 75119 ; 204119 ; 423143 ; 423146 ;
Abstract
A hydrometallurgical process for the treatment of a raw material which contains iron and other metals, with a sulfuric acid solution, in order to dissolve the metals and to precipitate and separate the iron, the separated metal sulfate solution being exposed to evaporation in order to crystallize and separate the metal sulfates from the mother liquor, which is recycled to the treatment stage performed with sulfuric acid solution, and the separated metal sulfate being recovered.