Title:
固体粒子の金属イリジウムおよび／または酸化イリジウムを含む混合物を分解する方法
Document Type and Number:
Japanese Patent JP6486499
Kind Code:
B2
Abstract:
A process for digestion of fine iridium includes (a) alkaline oxidative digestion of 1 part by weight fine iridium and 3 to 20 parts by weight of a combination comprising 40 to 70 parts by weight sodium hydroxide, 15 to 30 parts by weight sodium nitrate, and 10 to 40 parts by weight sodium peroxide in the melt, whereby the sum of the weight fractions equals 100 parts by weight; (b) cooling the digestion material formed in step (a) to 20 to 70° C.; (c) dissolving the acid-soluble fractions of the cooled digestion material in water/halogen hydracid until an acidic aqueous solution with a pH value of −1 to +1 is obtained; and (d) boiling the acidic aqueous solution obtained in step (c) until the formation of nitrous gases is completed. Insoluble ingredients can be separated from the acidic aqueous solution before or after step (d), if needed.
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Inventors:
Stätner Martin
Gunter Magdalena
Fuchs Alameda Stephanie
Thiel Fasco
Foss steffen
Gunter Magdalena
Fuchs Alameda Stephanie
Thiel Fasco
Foss steffen
Application Number:
JP2017553373A
Publication Date:
March 20, 2019
Filing Date:
February 24, 2016
Export Citation:
Assignee:
Heraeus Deutscher Gaem Behr und Company Cargae
International Classes:
C22B11/00; C22B3/06
Domestic Patent References:
| JP59123730A | ||||
| JP59145739A | ||||
| JP2001064734A | ||||
| JP2008202063A |
Attorney, Agent or Firm:
Hayashi Ichiyoshi