Catalyst demetallization by oxidation in a defined...

Details Catalyst demetallization by oxidation in a defined... Catalyst demetallization by oxidation in a defined...

C - Chemistry, Metallurgy

10

G

196/106, 260/713

C10G 11/18 (2006.01) B01J 8/24 (2006.01) B01J 21/20 (2006.01) B01J 29/90 (2006.01)

Patent

CA 1088495

ABSTRACT OF THE DISCLOSURE A process for the removal of metal poisons such as nickel, iron and/or vanadium from a hydrocarbon conversion catalyst which includes the steps of contacting a regenerated sulfided catalyst with an oxygen-containing gas in a defined temperature range of from about 525°F. to about 725°F. and washing at least a portion of the metal poisons from the catalyst. A preferred wash solution is a reductive wash medium comprising a saturated, aqueous solution of SO2. The vanadium and nickel metals may be recovered from the resultant used wash solution for possible metallurgical use. The washed catalyst may also be subjected to subsequent oxidative washes such as a hydrogen peroxide wash prior to its return to the hydrocarbon conversion process.

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