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US 10,647,634 B2Granted
Process for catalytic dehydrogenation
AssigneeDow Global Technologies LLC
InventorsMatthew T. Pretz, Lin Luo
Life of this patent
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Abstract
A process for catalytic dehydrogenation comprising mixing fluidization gas a fluidization gas which comprises methane, natural gas, ethane, hydrogen, nitrogen or any combination thereof with a fluidized catalyst stream that has passed through a catalytic dehydrogenation reactor and has exited a catalyst separation zone to form a catalyst recycle stream; and recycling the catalyst recycle stream either directly or indirectly into a catalytic dehydrogenation reactor is provided.
Claims18
A process for catalytic dehydrogenation comprising:
- catalytically dehydrogenating a hydrocarbon feed in the presence of a dehydrogenation catalyst in a fluidized bed catalytic dehydrogenation reactor to produce a product stream comprising used catalyst and at least one dehydrogenated hydrocarbon;
- separating the used catalyst from gaseous components of the product stream;
- mixing a fluidization gas which comprises at least 60 vol. % methane with at least a portion of the used catalyst in a catalyst fluidization section to fluidize the at least a portion of the used catalyst to produce at least a catalyst recycle stream;
- and
- recycling the catalyst recycle stream either directly or indirectly into the fluidized bed catalytic dehydrogenation reactor.
2 more elements
A process for catalytic dehydrogenation comprising:
- catalytically dehydrogenating a hydrocarbon feed in the presence of a dehydrogenation catalyst in a fluidized bed catalytic dehydrogenation reactor to produce a product stream comprising used catalyst and at least one dehydrogenated hydrocarbon;
- separating the used catalyst from gaseous components of the product stream;
- passing used catalyst to a reactor recycle catalyst fluidization section and to a stripping section separate from the catalyst fluidization section;
- in the catalyst fluidization section, mixing a fluidization gas comprising methane, natural gas, ethane, hydrogen, nitrogen, or any combination thereof with the used catalyst stream passed to the catalyst fluidization section to form a catalyst recycle stream;
- in the stripping section, contacting a stripping gas with the used catalyst passed to the stripping section to produce a stripped used catalyst;
- recycling the catalyst recycle stream either directly or indirectly into the fluidized bed catalytic dehydrogenation reactor;
- and
- passing at least a portion of the stripped used catalyst to a catalyst regeneration process.
5 more elements
Dependencies are inferred from the claim text.