Title:
白金及びパラジウムの回収方法
Document Type and Number:
Japanese Patent JP5777150
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To selectively, rapidly, readily and efficiently recover platinum and palladium from a nitric acid solution containing platinum, palladium, silver, copper, etc.SOLUTION: A method for recovering platinum and palladium comprises: a step of contacting the nitric acid solution containing platinum, palladium, silver and copper with an organic phase containing trioctylphosphine oxide or trioctylmethylammonium nitrate as an extractant, thereby selectively extracting platinum and palladium from the nitric acid solution into the organic phase; and a step of reducing and precipitating platinum and palladium by adding a reducing agent to the organic phase after the extraction treatment of platinum and palladium in the previous step, thereby recovering platinum and palladium.
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Inventors:
Taketomi Akito
Akihiko Okuda
Akihiko Okuda
Application Number:
JP2011101921A
Publication Date:
September 09, 2015
Filing Date:
April 28, 2011
Export Citation:
Assignee:
Tanaka Kikinzoku Kogyo Co., Ltd.
International Classes:
C22B11/00; C22B3/38; C22B3/44
Domestic Patent References:
| JP7331349A | ||||
| JP2000178664A | ||||
| JP2001207223A | ||||
| JP3215605A |
Attorney, Agent or Firm:
Eiichiro Shimazaki
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