Title:
A recovery method of platinoid elements
Document Type and Number:
Japanese Patent JP6229847
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a recovery method having an enhanced recovery ratio of selenium, rhodium, and ruthenium while suppressing reduction of tellurium.SOLUTION: In a recovery method of platinum group elements and selenium where selenium scum is precipitated by adding a reducer to an original liquid containing the platinum group elements, selenium, and tellurium, the selenium and the platinum group elements are reduced while suppressing reduction of the tellurium by setting a terminal concentration of selenium of 3 g/L-20 g/L in the original liquid. For example, an oxidation reduction potential of 520 mV-420 mV is set as a terminal point, or an oxidation reduction potential of 490 mV-470 mV is set as a terminal point in the presence of activated carbon in the recovery method of platinum group elements and selenium.
Inventors:
Ryosuke Sato
Satoru Okada
Satoru Okada
Application Number:
JP2014072580A
Publication Date:
November 15, 2017
Filing Date:
March 31, 2014
Export Citation:
Assignee:
Mitsubishi Materials Corporation
International Classes:
C22B11/00; C22B3/44; C22B7/00; C22B61/00
Domestic Patent References:
| JP2012126611A | ||||
| JP2005273009A | ||||
| JP2004035969A |
Attorney, Agent or Firm:
Hiroshi Chiba
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