Title:
CLASSIFICATION METHOD OF RUTHENIUM AND IRIDIUM
Document Type and Number:
Japanese Patent JP2022155328
Kind Code:
A
Abstract:
To provide a method for effectively classifying ruthenium and iridium from a hydrochloric acid acidic solution containing ruthenium and iridium.SOLUTION: A classification method of ruthenium and iridium includes: a step of adjusting an oxidation-reduction potential of a hydrochloric acid acidic solution containing ruthenium and iridium to less than 480 mV with silver/silver chloride electrode as a reference electrode; and steps of the following (1) and (2). Step (1): adjusting the hydrochloric acid acidic solution with the oxidation-reduction potential adjusted to 30 to 70°C and reacting with iron to sediment ruthenium. Step (2): heating the hydrochloric acid acidic solution to 75°C or higher, and adding a sodium thiosulfate salt or a thiosulfate ion-containing solution by 10 g/L or more in terms of sodium thiosulfate 5 hydrate to sediment iridium.SELECTED DRAWING: Figure 1
Inventors:
MANABE MANABU
Application Number:
JP2021058769A
Publication Date:
October 13, 2022
Filing Date:
March 30, 2021
Export Citation:
Assignee:
JX NIPPON MINING & METALS CORP
International Classes:
C22B11/00; C22B3/44; C22B3/46
Attorney, Agent or Firm:
Axis International Patent Business Corporation