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US 4,359,400 AGranted
Catalyst regeneration procedure
AssigneeMobil Oil Corporation
InventorsGeorge R. Landolt, William D. McHale, Hans J. Schoennagel
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AssigneeMobil Oil Corporation
InventorsGeorge R. Landolt, William D. McHale, Hans J. Schoennagel
Estimating the term…
Supported multi-metallic platinum-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 hydrogen at an elevated temperature to convert a substantial portion of the non-platinum component present in the catalyst to its metallic form, (3) contacting the reduced catalyst with dry hydrogen chloride in the absence of oxygen, (4) treatment of the hydrogen chloride treated catalyst with chlorine, and (5) reduction of the chlorine treated catalyst with a reducing agent, such as hydrogen.
In the process for treatment of a supported multi-metallic platinum-containing catalyst wherein said catalyst is contacted with an oxygen-containing gas at elevated temperatures, followed by a first reduction step, followed by treatment with chlorine at elevated temperatures, followed by a second reduction step, the improvement which comprises treating said catalyst with a dry hydrogen halide in the absence of oxygen or a source thereof after or concurrent with the first reduction treatment and carrying out the remaining steps in the absence of oxygen or a source thereof.
In a process for reactivating a reforming catalyst, which includes a platinum- and iridium-containing component composited with a refractory porous inorganic oxide, previously inactivated by coke deposition thereon during contact with a hydrocarbon feed at hydrocarbon conversion conditions and subsequently regenerated by burning at elevated temperatures in the presence of oxygen containing gases to remove accumulated coke deposits therefrom, the improved combination which comprises:
Dependencies are inferred from the claim text.