Invention Grant
- Patent Title: Method for recovery of copper and zinc
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Application No.: US15111987Application Date: 2015-01-21
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Publication No.: US10221493B2Publication Date: 2019-03-05
- Inventor: Erkki Paatero , Kari Hietala , Mika Haapalainen
- 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: FI20145060 20140122
- International Application: PCT/FI2015/050031 WO 20150121
- International Announcement: WO2015/110702 WO 20150730
- Main IPC: C25C1/12
- IPC: C25C1/12 ; C22B3/00 ; C22B15/00 ; C22B19/20 ; C22B3/42 ; C22B3/46 ; C22B3/26

Abstract:
The present invention provides a method of recovering copper and zinc from an aqueous sulfate and chloride containing solution. In the first process step zinc and copper are simultaneous extracting with an extraction solution comprising a liquid chelating cation exchanger and a liquid anion exchanger. The extraction is followed by consecutive stripping stages. First the anionic species are washed from the organic phase with one or more aqueous solutions and finally the copper is stripped with an aqueous acidic solution.
Public/Granted literature
- US20160369417A1 METHOD FOR RECOVERY OF COPPER AND ZINC Public/Granted day:2016-12-22
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