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:
Jun. 15, 1977
Applicant:
Inventor:
Richard T Um, Mt. Prospect, IL (US);
Assignee:
UOP Inc., Des Plaines, IL (US);
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C01G / ; C25C / ;
U.S. Cl.
CPC ...
204 66 ; 204117 ; 423 98 ; 423494 ;
Abstract
Lead values may be recovered from lead bearing sources such as lead sulfide in improved purity. The improved purity is obtained by subjecting soluble lead halides formed by the halogenation of lead sulfide and brine leaching the chlorinated product prior to treatment with a reducing agent followed by filtration and further treatment with an oxidizing agent whereby impurities as represented by other metal values are removed.