US Patent 7118719 Method for the hydrolytic precipitation of iron
Patent 7118719 was granted and assigned to Outokumpu on October, 2006 by the United States Patent and Trademark Office.
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Patent abstract
The invention relates to a method for the hydrolytic precipitation of iron as jarosite from a sulphate-containing solution in connection with zinc recovery from zinc calcine. The recovey contains neutral leach, ferrite leach, zinc electrolysis and iron precipitation stages. The ferrite included in the calcine is leached with return acid of the electrolysis after which the iron present in ferrous form is neutralized and routed to an iron precipitation stage, where the iron is oxidised to the trivalent form using an oxygen-containing gas. Also present in the precipitation stage arc Na, K or NH4 ions and jarosite nuclei.
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US Patent 07118719 Method for the hydrolytic precipitation of iron US Patent 7118719 Method for the hydrolytic precipitation of iron
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Patent Number
0711871900
Patent Number
711871900
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Infobox
Is a
Current Assignee
Patent Jurisdiction
Patent Number
071187190
Date of Patent
October 10, 2006
0Patent Application Number
104509210
Date Filed
December 7, 2001
0Official Website
Patent Primary Examiner
Edits on 23 Sep, 2022
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Infobox
Is a
Current Assignee
Patent Jurisdiction
Patent Number
071187190
Date of Patent
October 10, 2006
0Patent Application Number
104509210
Date Filed
December 7, 2001
0Official Website
Patent Primary Examiner
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US Patent 07118719 Method for the hydrolytic precipitation of iron
Infobox
Is a
Current assignee
Patent jurisdiction
Patent number
07118719
Date of patent
October 10, 2006
Patent application number
10450921
Date Filed
December 7, 2001
Patent primary examiner
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