US Patent 7731777 Method for processing anode sludge
Patent 7731777 was granted and assigned to Outotec on June, 2010 by the United States Patent and Trademark Office.
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Patent abstract
The invention relates to a hydrometallurgical method for separating the precious metals and impurities of anode sludge obtained from copper electrolysis. According to the method, anode sludge copper is separated in atmospheric leaching; calcinated in two steps for separating selenium and for sulfatizing silver; the sulfatized silver is separated by leaching into a neutral aqueous solution, from which it can be separated by reduction or by extraction.
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US Patent 07731777 Method for processing anode sludge US Patent 7731777 Method for processing anode sludge
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Patent Number
0773177700
Patent Number
773177700
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Infobox
Is a
Current Assignee
Patent Jurisdiction
Patent Number
077317770
Date of Patent
June 8, 2010
0Patent Application Number
105721040
Date Filed
August 31, 2004
0Official Website
Patent Primary Examiner
Edits on 25 Sep, 2022
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Infobox
Is a
Current Assignee
Patent Jurisdiction
Patent Number
077317770
Date of Patent
June 8, 2010
0Patent Application Number
105721040
Date Filed
August 31, 2004
0Official Website
Patent Primary Examiner
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US Patent 07731777 Method for processing anode sludge
Infobox
Is a
Current assignee
Patent jurisdiction
Patent number
07731777
Date of patent
June 8, 2010
Patent application number
10572104
Date Filed
August 31, 2004
Patent primary examiner
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