Title:
METHOD FOR RECOVERING RUTHENIUM FROM SPENT CATALYSTS CONTAINING RUTHENIUM OXIDE
Document Type and Number:
WIPO Patent Application WO/2010/076297
Kind Code:
A3
Abstract:
The invention relates to a method for recovering ruthenium from a spent ruthenium-containing catalyst which contains ruthenium in the form of ruthenium oxide on a support material that is poorly soluble in mineral acid. Said method comprises the following steps: a) the catalyst containing ruthenium oxide is reduced in a gas stream containing hydrogen chloride and an optional inert gas at a temperature ranging from 300 to 500°C; b) the catalyst that has been reduced in step a) and contains metallic ruthenium on the poorly soluble support material is treated with hydrochloric acid in the presence of a gas containing oxygen such that the metallic ruthenium on the support is dissolved in the form of ruthenium(III) chloride and is recovered in the form of aqueous ruthenium(III) chloride solution; c) if necessary, the ruthenium(III) chloride solution obtained in step b) is further processed.
Inventors:
HENZE GUIDO (DE)
URTEL HEIKO (DE)
SESING MARTIN (DE)
KARCHES MARTIN (DE)
URTEL HEIKO (DE)
SESING MARTIN (DE)
KARCHES MARTIN (DE)
Application Number:
PCT/EP2009/067939
Publication Date:
October 13, 2011
Filing Date:
December 28, 2009
Export Citation:
Assignee:
BASF SE (DE)
HENZE GUIDO (DE)
URTEL HEIKO (DE)
SESING MARTIN (DE)
KARCHES MARTIN (DE)
HENZE GUIDO (DE)
URTEL HEIKO (DE)
SESING MARTIN (DE)
KARCHES MARTIN (DE)
International Classes:
C22B11/00
Domestic Patent References:
WO2008062785A1 | 2008-05-29 |
Foreign References:
DE102005061954A1 | 2007-07-05 | |||
JP2002206122A | 2002-07-26 | |||
EP0767243A1 | 1997-04-09 |
Attorney, Agent or Firm:
SCHUCK, Alexander (Eastsite OneSeckenheimer Landstraße 4, Mannheim, DE)
Download PDF: