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Title:
METHOD FOR RECOVERING PLATINUM AND PALLADIUM
Document Type and Number:
Japanese Patent JP2012233225
Kind Code:
A
Abstract:

To selectively, rapidly, readily and efficiently recover platinum and palladium from a nitric acid solution containing platinum, palladium, silver, copper, etc.

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.


Inventors:
TAKETOMI AKIHITO
OKUDA AKIHIKO
Application Number:
JP2011101921A
Publication Date:
November 29, 2012
Filing Date:
April 28, 2011
Export Citation:
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Assignee:
TANAKA PRECIOUS METAL IND
International Classes:
C22B11/00; C22B3/26; C22B3/44; C22B7/00; C22B15/00
Domestic Patent References:
JPH03215605A1991-09-20
JPH07331349A1995-12-19
JP2000178664A2000-06-27
JP2001207223A2001-07-31
Attorney, Agent or Firm:
Eiichiro Shimazaki