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. 23, 1979
Filed:
Mar. 09, 1978
Applicant:
Inventor:
John C Stauter, Streamwood, IL (US);
Assignee:
UOP Inc., Des Plaines, IL (US);
Primary Examiner:
Int. Cl.
CPC ...
C25C / ;
U.S. Cl.
CPC ...
204117 ;
Abstract
The production of metallic lead from lead bearing sources may be facilitated by a process in which a lead bearing source such as lead sulfide ores or concentrates are halogenated and the halogenated source is then brine leached in the presence of a sodium chloride solution to separate the soluble lead halide from solid material such as gangue and elemental sulfur. The soluble lead halide is recrystallized at a reduced temperature and thereafter converted to lead carbonate by treatment with sodium carbonate. Metallic lead in the form of sheets is recovered by solubilizing the lead carbonate in hydrofluosilicic acid and electrowinning lead from the solution.