Invention Grant
- Patent Title: Method for recovering gold by solvent extraction
- Patent Title (中): 溶剂萃取法回收金的方法
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Application No.: US13702232Application Date: 2011-06-07
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Publication No.: US08926730B2Publication Date: 2015-01-06
- Inventor: Erkki Paatero , Mika Haapalainen
- Applicant: Erkki Paatero , Mika Haapalainen
- Applicant Address: FI Espoo
- Assignee: Outotec Oyj
- Current Assignee: Outotec Oyj
- Current Assignee Address: FI Espoo
- Agency: Buchanan, Ingersoll & Rooney, PC
- Priority: FI20100243 20100609
- International Application: PCT/FI2011/050532 WO 20110607
- International Announcement: WO2011/154603 WO 20111215
- Main IPC: C22B3/00
- IPC: C22B3/00 ; C25C1/20 ; C01G7/00 ; C22B3/26

Abstract:
The invention relates to a method for recovering gold by solvent extraction from an acidic chloride-containing aqueous solution or from slurry containing gold-bearing solids using a diester-based reagent that is poorly soluble in water as organic extraction solution. In accordance with the method, gold is extracted extremely effectively, but other precious metals and many other metals quite sparingly. Gold is stripped from the extraction phase with pure water, from which the gold can be reduced either chemically or electrochemically.
Public/Granted literature
- US20130104701A1 METHOD FOR RECOVERING GOLD BY SOLVENT EXTRACTION Public/Granted day:2013-05-02
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