Mineral oils: processes and products – Chemical conversion of hydrocarbons – Reforming
Patent
1973-08-16
1976-03-09
Douglas, Winston A.
Mineral oils: processes and products
Chemical conversion of hydrocarbons
Reforming
252415, C10G 3508, B01J 2396
Patent
active
039430529
ABSTRACT:
Supported iridium-containing hydrocarbon conversion catalysts which are at least partially deactivated due to the deposition of carbonaceous residues thereon during contact with hydrocarbons are regenerated by (1) contacting the catalyst with oxygen to burn at least a portion of the carbonaceous residues from the catalyst, (2) contacting the carbonaceous residue-depleted catalyst with an elemental halogen-containing gas at a temperature of less than about 850.degree.F., (3) contacting the treated catalyst with hydrogen at elevated temperatures to reduce a substantial portion of the iridium present in the catalyst to its metallic form, and (4) contacting the catalyst from step (3) with an elemental halogen-containing gas at a temperature of at least about 850.degree.F. Steps (3) and (4) may be repeated, in sequence, at least one additional time to redisperse the iridium catalyst component to a highly active, high surface area state.
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Kmak Walter S.
Yates David J. C.
Ditsler J. W.
Douglas Winston A.
Exxon Research & Engineering Co.
Konopka P. E.
Luecke J. E.
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