Catalyst – solid sorbent – or support therefor: product or process – Regenerating or rehabilitating catalyst or sorbent – Treating with a liquid or treating in a liquid phase,...
Patent
1997-04-17
1998-03-17
Caldarola, Glenn
Catalyst, solid sorbent, or support therefor: product or process
Regenerating or rehabilitating catalyst or sorbent
Treating with a liquid or treating in a liquid phase,...
502 22, 502 27, B01J 3852, B01J 3860
Patent
active
057286396
ABSTRACT:
A process is disclosed for converting a spent catalyst from conventional fluorination processes into a commercially useful tantalum or niobium oxide such as Ta(OH)5, Ta2O5, Nb(OH)5, or Nb2O5. The process broadly relates to dissolving the spent catalyst into water or an aqueous hydrofluoric acid solution, separating and disposing the undissolved residue, extracting the aqueous solution with a suitable solvent such as methyl isobutyl ketone (MIBK), and obtaining useful tantalum or niobium oxide products.
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Caldarola Glenn
E. I. Du Pont de Nemours and Company
Ghyka Alexander G.
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