Catalyst regeneration process and use of the catalyst in hydrocarbon conversion processes
AssigneeInstitut Francais du Petrole
InventorBlaise Didillon
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Abstract
The present invention concerns a regeneration process for a catalyst containing at least one metallic element selected from the group formed by platinum, palladium, ruthenium, rhodium, osmium, iridium and nickel, preferably platinum, on a refractory oxide based support, which has been deactivated by coke deposition. The regeneration process is characterised in that said regeneration consists of treatment with a gas containing at least chlorine and molecular oxygen, at a temperature between 20.degree. C. and 800.degree. C. and a total gas flow rate, expressed in litres of gas per hour and per gram of catalyst, of between 0.05 and 20. The process at least restores the initial catalytic properties of the catalyst.
Claims15
A process for the dehydrogenation or dehydrocyclization of a hydrocarbon feedstock comprising paraffins of 3 to 8 carbon atoms per molecule, comprising contacting said feedstock with a catalyst containing at least one metallic element selected from the group formed by platinum, palladium, ruthenium, rhodium, osmium, iridium and nickel on a refractory oxide based support, said catalyst having been deactivated by coke deposition and regenerated by a process comprising burning off of deposited coke, and conducting oxychlorination, by simultaneously effecting oxychlorination whenever burning off deposited coke, by treating the catalyst with a gas containing at least chlorine and molecular oxygen, at a temperature generally between 20.degree. C. and 800.degree. C. and a total gas flow rate, expressed in liters of gas per hour per gram of catalyst, of between 0.05 and 20.
A process for the dehydrogenation or dehydrocyclization of a hydrocarbon feedstock comprising paraffins of 3 to 8 carbon atoms per molecule, comprising contacting said feedstock with a dehydrogenation or dehydrocyclization catalyst deactivated by coke deposition, and regenerated by burning off deposited coke and conducting oxychlorination, by simultaneously conducting oxychlorination whenever burning off deposited coke.
A process for the dehydrogenation or dehydrocyclization of a hydrocarbon feedstock comprising paraffins of 3 to 8 carbon atoms per molecule, comprising contacting said feedstock with a dehydrogenation or dehydrocyclization catalyst deactivated by coke deposition, and regenerated by calcining said catalyst in the presence of a gas containing oxygen and chlorine in amounts effective to redistribute any agglomerated catalyst metals, with the proviso that calcining of the catalyst is not conducted in the absence of the gas containing oxygen and chlorine.
Dependencies are inferred from the claim text.