Process for metals recovery from spent catalyst

Details Process for metals recovery from spent catalyst Process for metals recovery from spent catalyst

2005-07-29

2009-02-03

Bos, Steven (Department: 1793)

Chemistry of inorganic compounds

Treating mixture to obtain metal containing compound

Group vib metal

C423S055000, C423S056000, C423S067000, C423S068000, C423S087000, C423S306000, C423S139000, C423S146000

Reexamination Certificate

active

07485267

ABSTRACT:
The process of this invention is directed to the removal of metals from an unsupported spent catalyst. The catalyst is subjected to leaching reactions. Vanadium is removed as a precipitate, while a solution comprising molybdenum and nickel is subjected to further extraction steps for the removal of these metals. Molybdenum may alternately be removed through precipitation.

REFERENCES:
patent: 3357821 (1967-12-01), Henrickson
patent: 3455677 (1969-07-01), Litz
patent: 4298581 (1981-11-01), Douglas et al.
patent: 4432949 (1984-02-01), Hubred et al.
patent: 4514369 (1985-04-01), Hubred et al.
patent: 4544533 (1985-10-01), Marcantonio
patent: 4762812 (1988-08-01), Lopez et al.

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