Dehydrogenation process
OwnerManuela Serban, Michael J. Vetter +2inventors
InventorsManuela Serban, Michael J. Vetter, Gregory J. Nedohin, Clayton C. Sadler
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Abstract
Large pill dehydrogenation catalysts and large screens slot width are combined in dehydrogenation units to reduce the pressure drop across the catalyst bed and reactor screens compared to conventional screen and catalyst size combinations. The catalyst has an average pill diameter in the range of 1.6 mm to 3.0 mm, and the slot width of the screen is in the range of about 30% to about 60% of the pill diameter.
Claims20
A process for dehydrogenation of a hydrocarbon feed comprising:
- providing a hydrocarbon feed stream comprising at least one paraffin to a dehydrogenation reactor, the reactor comprising a shell containing at least one screen;
- contacting the feed stream with a catalyst in the reactor under dehydrogenation conditions, the catalyst having an average pill diameter in a range of 1.6 mm to 3.0 mm, and wherein a catalyst-side screen slot width of the at least one screen is in a range of about 30% to about 60% of the pill diameter;
- and
- removing an effluent stream comprising at least one olefin from the reactor.
A process for dehydrogenation of a hydrocarbon feed comprising:
- providing a hydrocarbon feed stream comprising at least one paraffin to a dehydrogenation reactor, the reactor comprising a shell containing at least one screen;
- contacting the feed stream with a catalyst in the reactor under dehydrogenation conditions, the catalyst having an average pill diameter in a range of 1.6 mm to 3.0 mm, and wherein a catalyst-side screen slot width of the at least one screen is in a range of about 30% to about 60% of the pill diameter;
- removing an effluent stream comprising at least one olefin from the reactor;
- wherein the relative delta pressure in the catalyst bed is decreased by at least 15% compared to a process using a catalyst having an average pill diameter of less than 1.6 mm.
A dehydrogenation reactor comprising:
- a shell having a feed inlet and an effluent outlet, the shell containing a pair of screens;
- and
- a catalyst having an average pill diameter in a range of 1.6 mm to 3.0 mm, and wherein a catalyst-side screen slot width of the pair of screens is in a range of about 30% to about 60% of the pill diameter, wherein the catalyst has a higher piece crush strength than a catalyst having an average pill diameter of less than 1.6 mm, or wherein the catalyst has a lower apparent bulk density than a catalyst having an average pill diameter of less than 1.6 mm, or both, the catalyst positioned between the pair of screens.
Dependencies are inferred from the claim text.