Invention Grant
- Patent Title: Method for recovering gold from an ore or a refining intermediate containing gold
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Application No.: US15766954Application Date: 2017-03-30
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Publication No.: US10883155B2Publication Date: 2021-01-05
- Inventor: Akira Yoshimura , Yoshifumi Abe
- Applicant: JX NIPPON MINING & METALS CORPORATION
- Applicant Address: JP Tokyo
- Assignee: JX NIPPON MINING & METALS CORPORATION
- Current Assignee: JX NIPPON MINING & METALS CORPORATION
- Current Assignee Address: JP Tokyo
- Agency: Birch, Stewart, Kolasch & Birch, LLP
- Priority: JP2016-073334 20160331
- International Application: PCT/JP2017/013456 WO 20170330
- International Announcement: WO2017/170960 WO 20171005
- Main IPC: C22B3/00
- IPC: C22B3/00 ; C22B3/10 ; C22B3/06

Abstract:
A method for recovering gold from an ore or a refining intermediate containing gold, comprising a step of contacting a gold-containing raw material obtained from the ore or the refining intermediate with an acidic solution containing a copper ion, an iron ion and a halide ion while supplying an oxidizing agent to leach the gold component in the raw material. The halide ion in the acidic solution is only a bromide ion, wherein the concentration of the bromide ion in the acidic solution is 100 g/L or more or the concentration of the bromide ion in the acidic solution is less than 100 g/L. When the concentration of the bromide ion is less than 100 g/L, a concentration ratio of the halide ion in the acidic solution is such that a ratio of the concentration of the chloride ion to the concentration of the bromide ion is ⅓ or less.
Public/Granted literature
- US20180298465A1 METHOD FOR RECOVERING GOLD FROM AN ORE OR A REFINING INTERMEDIATE CONTAINING GOLD Public/Granted day:2018-10-18
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