Recovery of rhenium
AssigneeSD Lizenzverwertungsgesellschaft mbH & Co. KG
InventorsNabil Rizkalla, Andrzej Rokicki
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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.
Claims22
A method for recovering rhenium from a catalyst containing rhenium on a solid support, the method comprising extracting from the catalyst at least a substantial portion of the rhenium 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 said polar non-acidic organic solvent and extracted rhenium, wherein said polar non-acidic organic solvent contains one or more oxygen, nitrogen, and/or halogen atoms in its molecular structure.
Dependencies are inferred from the claim text.