Title:
METHOD FOR SEPARATING, ENRICHING AND RECOVERING PALLADIUM
Document Type and Number:
WIPO Patent Application WO/2002/061156
Kind Code:
A1
Abstract:
A method for recovering palladium by reducing and capturing a palladium ion present in water together with a divalent copper ion and the like, using a metal ion treating agent having a porous carrier and an anthrahydroquinone compound carried thereon, wherein (1) the divalent copper ion is first reduced selectively with a divalent tin ion or the like and then the palladium ion is reduced and captured with the metal ion treating agent, or (2) a solution containing a palladium ion stabilized by a divalent tin ion and being acidified with hydrochloric acid is increased in pH, to thereby precipitate palladium together with tin, the resultant precipitate is again dissolved and subjected to an oxidation treatment, and then the palladium ion is reduced and captured with the metal ion treating agent. The method can be utilized for recovering palladium with good efficiency, without being adversely affected by a coexisting divalent copper ion and the like.
Inventors:
HIRATA SUEHIDE (JP)
SAKURAI TATSUYA (JP)
SAKURAI TATSUYA (JP)
Application Number:
PCT/JP2001/000723
Publication Date:
August 08, 2002
Filing Date:
February 01, 2001
Export Citation:
Assignee:
KAWASAKI KASEI CHEMICALS (JP)
HIRATA SUEHIDE (JP)
SAKURAI TATSUYA (JP)
HIRATA SUEHIDE (JP)
SAKURAI TATSUYA (JP)
International Classes:
C22B3/00; C22B3/10; C22B7/00; C22B11/00; (IPC1-7): C22B11/00; C22B3/00; C22B7/00
Foreign References:
| JPS60208433A | 1985-10-21 | |||
| JPH07278620A | 1995-10-24 | |||
| US6106589A | 2000-08-22 | |||
| JPH11229050A | 1999-08-24 | |||
| JPH11323448A | 1999-11-26 | |||
| JP2000157983A | 2000-06-13 | |||
| JP2000157984A | 2000-06-13 | |||
| JP2000192162A | 2000-07-11 | |||
| JPH01270511A | 1989-10-27 | |||
| JPH01270513A | 1989-10-27 |
Attorney, Agent or Firm:
Senmyo, Kenji (Kanda-Higashimatsushitacho Chiyoda-ku, Tokyo, JP)
Download PDF: