Stripping metals from spent catalysts

Details Stripping metals from spent catalysts Stripping metals from spent catalysts

1984-12-10

1986-04-29

Konopka, P. E.

Chemistry of inorganic compounds

Treating mixture to obtain metal containing compound

Platinum group metal

75101R, 75119, 75121, 423 49, 423 53, 423 68, 423150, 502 24, 502 25, 502 26, 502116, C01G 5500, C01G 3900, C01G 5100, C01G 5300

Patent

active

045856281

ABSTRACT:
Spent catalysts are extracted for removal of catalytic metals from inert supports by oxidizing subvalent metals in a solution of a ligand which forms a soluble stable complex with the oxidized metal. The ligands are salts of 1,1-dithiolate, dithiocarbimate and dithiocarbamate dianions for extraction in water and of dithiocarbamate monoions for extraction in organic solvents.

REFERENCES:
patent: 2406960 (1946-09-01), Neal et al.
patent: 2640834 (1953-06-01), Tewksbury, Jr. et al.
patent: 3121693 (1964-02-01), Michalko
patent: 3567433 (1971-03-01), Gutnikov
patent: 3985854 (1976-10-01), Bradford et al.
patent: 4280897 (1981-07-01), Shah et al.
patent: 4343774 (1982-08-01), Tilley

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