Title:
多金属団塊からの金属回収のためのプロセス
Document Type and Number:
Japanese Patent JP7368474
Kind Code:
B2
Abstract:
The present disclosure concerns a process for the recovery of valuable metals from polymetallic nodules. A two-stage process using SO2 in an acidic aqueous media is disclosed. In a first step, performed in mildly acidic conditions, Mn, Ni, and Co are dissolved; in a second, more acidic step, Cu is dissolved. Under these conditions, the leachate of the first step contains most of the Mn, Ni, and Co, while being nearly Cu-free. The Ni and Co are precipitated as sulfides; the Mn can be recovered as sulfate by crystallization. Cu, which is leached in the second step, is secretively precipitated, also as sulfide.
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Inventors:
Michel Daniels
Jean Scoyer
Michael Baltes
Margo Nemain
Jean Reisen
Jean Scoyer
Michael Baltes
Margo Nemain
Jean Reisen
Application Number:
JP2021535799A
Publication Date:
October 24, 2023
Filing Date:
December 10, 2019
Export Citation:
Assignee:
Umicore
International Classes:
C22B3/08; C22B1/02; C22B3/44; C22B15/00; C22B23/00; C22B47/00
Domestic Patent References:
| JP56119743A | ||||
| JP50140319A | ||||
| JP55058340A | ||||
| JP54115625A | ||||
| JP48061311A |
Foreign References:
| US4208379 | ||||
| CN102358919A |
Attorney, Agent or Firm:
Yasuhiko Murayama
Shinya Mihiro
Tatsuhiko Abe
Shinya Mihiro
Tatsuhiko Abe