Recover and recycle rhodium from spent partial oxidation catalysts

2323 A method for the recovery of rhodium from spent supported catalysts. In one embodiment, a method for recovering rhodium from a host material includes roasting the host material in air at a temperature sufficient to convert at least a portion of rhodium to RhO, leaching the host material in a so...

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Bibliographic Details
Main Authors Chen, Zhen, Ricketson, Kevin L, Hu, Baili, Wright, Harold A, Allison, Joe D
Format Patent
LanguageEnglish
Published 02.08.2005
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Summary:2323 A method for the recovery of rhodium from spent supported catalysts. In one embodiment, a method for recovering rhodium from a host material includes roasting the host material in air at a temperature sufficient to convert at least a portion of rhodium to RhO, leaching the host material in a solution with a leaching constituent which is reactive with RhOto form a first intermediate species, reacting the first intermediate species in a solution with an acidifying constituent or complexing agent to form a second intermediate species, and purifying the second intermediate species. Preferably, the roasting temperature is approximately from 600° C. to 800° C. for 0.5 to 10 hours. In some embodiments, the host material is ground to particles in the range of 0.1 to 10 mm.