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:
May. 02, 1978
Filed:
Feb. 16, 1977
Applicant:
Inventors:
John C Stauter, Streamwood, IL (US);
William K Tolley, Arlington Heights, IL (US);
Assignee:
UOP Inc., Des Plaines, IL (US);
Primary Examiner:
Int. Cl.
CPC ...
C25C / ;
U.S. Cl.
CPC ...
204117 ; 204114 ;
Abstract
The production of metallic lead from lead bearing sources such as lead sulfide concentrates may be improved by subjecting the lead sulfide concentrates to a prehalogenation activation treatment at a temperature in the range of from about 300.degree. to about 600.degree. C. before subjecting said concentrate to the halogenation step which is effected at a temperature in the range of from about 80.degree. to about 120.degree. C. followed by leaching, filtering, crystallization and electrolysis.