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. 15, 1995
Filed:
Aug. 12, 1993
Applicant:
Inventor:
Marco Olper, Monza, IT;
Assignee:
B.U.S. Engitec Servizi Ambientali S.r.l., Milan, IT;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C25B / ; C25C / ;
U.S. Cl.
CPC ...
204 94 ; 204115 ;
Abstract
Raw lead to be refined, whether of mineral origin or from reclaiming operations, the particle size of which has been reduced to a range not larger than 50 mm, is leached in a suitable apparatus with a solution of ferric fluoroborate in fluoroboric acid. During the leaching step, lead is dissolved, with ferric fluoroborate being reduced to ferrous fluoroborate according to the following reaction: