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
1993-12-14
1997-04-15
Caldarola, Glenn A.
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 33, 423 64, 423 65, B01J 2034, B01J 3560
Patent
active
056209363
ABSTRACT:
A process is disclosed for converting a spent catalyst from conventional fluorination processes into a commercially useful tantalum or niobium salt such as K.sub.2 TaF.sub.7 or K.sub.2 NbF.sub.7. The process broadly relates to dissolving the spent catalyst in 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 products from the MIBK solution such as a tantalum salt.
REFERENCES:
patent: 2962372 (1960-11-01), Foos et al.
patent: 3065046 (1962-11-01), Foos et al.
patent: 3107976 (1963-10-01), Koerner et al.
patent: 3112991 (1963-12-01), Fisher
patent: 3117833 (1964-01-01), Pierret
patent: 3712939 (1973-01-01), Capps et al.
patent: 3830871 (1974-08-01), Mayer et al.
patent: 3972710 (1976-08-01), Meyer
patent: 3976475 (1976-08-01), Markland
patent: 4065405 (1977-12-01), Hulme
patent: 4258225 (1981-03-01), Feiring
patent: 4445438 (1984-05-01), Theurer et al.
patent: 4451438 (1984-05-01), Floeter et al.
patent: 4663130 (1987-05-01), Bergman et al.
patent: 4673554 (1987-06-01), Niwa et al.
patent: 4967024 (1990-10-01), Gumprecht et al.
patent: 5209910 (1993-05-01), Bludssus et al.
patent: 5437848 (1995-08-01), Hard
Edward G. Scheibel, Bench Scale Liquid Extraction Techniques, 49, 1679-1684, Oct. 1957.
A. E. Feiring, Chemistry In Hydrogen Fluoride v. Catalysts For Reaction Of HF With Halogenated Olefins, Journal of Fluorine Chemistry, 13 (1979) 7-18 .
Carlson Norman A.
Felix Vinci M.
Mosheim Charles E.
Boyer Michael K.
Cabot Performance Material
Caldarola Glenn A.
E. I. DuPont de Nemours and Company
Ghyka Alexander G.
LandOfFree
Recovery of spent catalyst does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Recovery of spent catalyst, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Recovery of spent catalyst will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-360600