Processes for catalytic paraffin dehydrogenation and catalyst recovery
AssigneeKellogg Brown & Root LLC
InventorsMichael J. Tallman, Manoj Nagvekar
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Abstract
A paraffin having 2-8 carbon atoms may be dehydrogenated by contacting the paraffin with metal oxide catalyst(s) to produce light olefins, such as propylene, under certain reaction conditions in a riser, fluidized bed, or fixed-bed swing reactor. The resulting metal oxide catalyst fines contained in the reactor effluent stream formed by the dehydrogenation reaction may be recovered by contacting the reactor effluent stream with a wash fluid to form a catalyst effluent stream that is subsequently slurried and filtered to capture the catalyst fines for potential reuse.
Claims20
A process for dehydrogenating paraffins, the process comprising:
- contacting at least one metal oxide catalyst with a paraffin having 2-8 carbon atoms for a reaction period ranging from about 0.05 seconds to about 10 minutes in a reactor.
The process for recovering catalyst fines from a reactor effluent stream of a catalytic paraffin dehydrogenation reaction, the process comprising:
- a. contacting a metal oxide catalyst with a paraffin having 2-8 carbon atoms in a reactor;
- b. generating a reactor effluent stream comprising metal oxide catalyst fines after contacting with the metal oxide catalyst with the paraffin;
- and
- c. contacting the reactor effluent stream with a wash fluid to transfer the metal oxide catalyst fines from the reactor effluent stream into the wash fluid and form a cooled catalyst effluent stream and a substantially catalyst-free product stream.
Dependencies are inferred from the claim text.