C - Chemistry – Metallurgy – 10 – G
Patent
C - Chemistry, Metallurgy
10
G
196/116
C10G 35/085 (2006.01) B01J 23/96 (2006.01) C10G 35/09 (2006.01)
Patent
CA 1321365
ABSTRACT OF THE DISCLOSURE Supported iridium-containing hydrocarbon conversion catalysts that are at least partially deactivated due to the deposition of carbonaceous residues thereon during contact with hydrocarbons are reactivated by (1) contacting the catalyst with a gas containing oxygen and a chlorinated compound at a temperature not exceeding about 425°C to burn a major portion of the carbonaceous residues from the catalyst, (2) contacting the partially carbonaceous residue depleted catalyst with a gas containing a chlorinated compound a temperature of at least about 460°C to increase the chloride content thereof, (3) contacting the chlorinated catalyst with a gas containing oxygen and a chlorinated compound at a temperature of at least about 460°C to burn a major portion of the remaining carbonaceous residue from the catalyst, (4) contacting the substantially carbonaceous residue depleted cata- lyst with a gas containing a chlorinated compound and oxygen at concentrations greater than those used in (3) and at a temperature of at least about 460°C under essentially stagnant conditions for at least 1 hour, and (5) repeating step (4) at least two additional times to redisperse the agglomerated iridium to a highly active, high surface area state.
607457
Borden Ladner Gervais Llp
Boyle Joseph P.
Exxon Research And Engineering Company
Imperial Oil Limited
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