Invention Grant
- Patent Title: Method for recovering gold
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Application No.: US15770534Application Date: 2016-10-27
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Publication No.: US10907237B2Publication Date: 2021-02-02
- Inventor: Mari Lundström , Riina Ahtiainen , John O'Callaghan
- Applicant: OUTOTEC (FINLAND) OY
- Applicant Address: FI Espoo
- Assignee: OUTOTEC (FINLAND) OY
- Current Assignee: OUTOTEC (FINLAND) OY
- Current Assignee Address: FI Espoo
- Agency: Buchanan Ingersoll & Rooney PC
- Priority: FI20155768 20151029
- International Application: PCT/FI2016/050752 WO 20161027
- International Announcement: WO2017/072411 WO 20170504
- Main IPC: C22B11/02
- IPC: C22B11/02 ; C22B3/00 ; C22B3/24 ; C22B3/04

Abstract:
Provided is a method of recovering gold, and optionally silver, from gold-bearing, and optionally silver-bearing, double refractory raw material, comprising the steps of (a) leaching the gold-bearing, and optionally silver-bearing, double refractory raw material in a chloride containing leaching solution to dissolve gold and to obtain a leach solution comprising gold, and optionally silver, in solution, whereby the redox of leaching solution in the chloride leaching step is above 550 mV vs. Ag/AgCl; and simultaneously contacting the leach solution comprising gold, and optionally silver, in solution with a re-sorptive material to obtain a gold-containing, and optionally silver-containing, re-sorptive material; and (b) recovering gold and optionally silver from the gold-containing, and optionally silver-containing, re-sorptive material.
Public/Granted literature
- US20190055623A1 METHOD FOR RECOVERING GOLD Public/Granted day:2019-02-21
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