Is a
Patent attributes
Patent Jurisdiction
Patent Number
Patent Inventor Names
Nabil Rizkalla0
Andrzej Rokicki0
Date of Patent
July 27, 2010
0Patent Application Number
121157790
Date Filed
May 6, 2008
0Patent Primary Examiner
Patent abstract
The present invention relates to a method for recovering rhenium from an ethylene oxide catalyst containing rhenium and at least silver on a solid support, wherein at least a substantial portion of the rhenium present in the catalyst is extracted by intimate contact of the catalyst with one or more polar non-acidic organic solvents substantially free of water such that a rhenium-containing solution is formed containing the polar non-acidic organic solvent and extracted rhenium, the polar non-acidic organic solvent containing one or more oxygen, nitrogen, and/or halogen atoms in its molecular structure.
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