Process for removing metals from spent catalyst

Details Process for removing metals from spent catalyst Process for removing metals from spent catalyst

1985-09-30

1987-06-30

Konopka, P. E.

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,...

75121, 208 52CT, 405128, 405129, 423 54, 423 68, 423150, 502 25, 502 28, 502516, B01J 3866, B01J 2392, C01G 3100, C22B 3422

Patent

active

046770852

ABSTRACT:
This invention pertains to a new process for removing metals, especially contaminant metals, from spent catalysts. Also, this invention pertains to a catalyst composite with metals removed by the new process, and to several uses for the catalyst, including as a rejuvenated hydrotreating catalyst. The new process comprises (i) contacting the spent catalyst with a complexing agent with four or more coordinating groups, including at least two carboxylic acid type groups and at least one amino type group, and (ii) separating from the spent catalyst a mixture containing the complexing agent and the removed metals. By this process contaminant metals, like vanadium, are more selectively removed from the spent catalyst than are catalytic metals, like cobalt and molybdenum.

REFERENCES:
patent: 3020239 (1962-02-01), Flinn et al.
patent: 3213033 (1965-10-01), Hindin et al.
patent: 3255102 (1966-06-01), Sanford et al.
patent: 3684738 (1972-08-01), Chen
patent: 3791989 (1974-02-01), Mitchell et al.
patent: 4280897 (1981-07-01), Shah et al.
patent: 4394355 (1983-07-01), Fruge

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