Invention Grant
- Patent Title: Method for recovering gold
- Patent Title (中): 黄金回收方法
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Application No.: US12162845Application Date: 2007-02-09
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Publication No.: US07799114B2Publication Date: 2010-09-21
- Inventor: Liisa Haavanlammi , Olli Hyvärinen , Marika Tiihonen , Reijo Tontti
- Applicant: Liisa Haavanlammi , Olli Hyvärinen , Marika Tiihonen , Reijo Tontti
- Applicant Address: FI Espoo
- Assignee: Outotec Oyj
- Current Assignee: Outotec Oyj
- Current Assignee Address: FI Espoo
- Agency: Buchanan Ingersoll & Rooney PC
- Priority: FI20060149 20060217
- International Application: PCT/FI2007/000030 WO 20070209
- International Announcement: WO2007/093666 WO 20070823
- Main IPC: C22B11/06
- IPC: C22B11/06 ; C22B3/04 ; C22B3/22 ; C01G7/00 ; C01B7/09

Abstract:
The invention relates to a method for recovering gold in connection with the hydrometallurgical production of copper from a waste or intermediate product containing sulphur and iron that is generated in the leaching of the copper raw material. The recovery of both copper and gold occurs in a chloride environment. The gold contained in the waste or intermediate is leached by means of divalent copper, oxygen and alkali bromide in a solution of copper (II) chloride and alkali chloride, in conditions where the oxygen-reduction potential is a maximum of 650 mV and the pH a minimum of 0.5. The bromide accelerates the dissolution of the gold.
Public/Granted literature
- US20090158894A1 METHOD FOR RECOVERING GOLD Public/Granted day:2009-06-25
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