Back to results
US 11,186,784 B2Granted
Dehydrogenation process having improved run time
AssigneeUop LLC
InventorsAlan E. Cepla, Gary A. Dziabis, Manuela Serban, Rui de Menezes, Massimiliano Cantarelli
Life of this patent
Estimating the term…
Abstract
New/fresh catalyst is added to a dehydrogenation unit and aged catalyst is removed from the dehydrogenation unit on a continuous or semi-continuous basis while the dehydrogenation unit is in operation. The conversion achieved by the higher activity catalyst results in the production rate of olefin product being maintained at near start-of-run production for longer, with a slower rate of decline. The higher activity catalyst extends run time, reduces feed consumption for each unit of olefin product, and minimizes fresh catalyst expenses.
Claims17
A process for dehydrogenation of a hydrocarbon feed comprising:
- providing a hydrocarbon feed stream comprising at least one paraffin to a dehydrogenation unit comprising a moving bed with radial flow in a reactor, wherein the reactor comprises screens that contain catalyst bed in the reactor;
- contacting the hydrocarbon feed stream with a catalyst in the reactor under dehydrogenation conditions, the catalyst having a particle size in a normal operating range;
- removing an effluent stream comprising at least one olefin from the reactor;
- and
- periodically removing a portion of between 5 wt % and 50 wt % of a total amount of the catalyst in the dehydrogenation unit every 45 to 180 days of operating time and replacing the portion of the catalyst removed with fresh catalyst while continuing to operate the reactor, wherein the portion of the catalyst removed has a particle size in the normal operating range and is at least 1.2 mm.
2 more elements
A process for dehydrogenation of a hydrocarbon feed comprising:
- providing a hydrocarbon feed stream comprising at least one paraffin to a dehydrogenation unit comprising a moving bed in a reactor, wherein the reactor comprises screens that contain catalyst bed in the reactor;
- contacting the hydrocarbon feed stream with a catalyst in the reactor under dehydrogenation conditions;
- removing an effluent stream comprising at least one olefin from the reactor;
- and
- periodically removing a portion of between 5 wt % and 50 wt % of a total amount of the catalyst in the dehydrogenation unit every 60 and 120 days of operating time and replacing the removed catalyst with fresh catalyst while continuing to operate the reactor at a 20-100% longer time between shutdowns for screen cleaning compared to operating the reactor without periodically removing the portion of between 5 wt % and 50 wt % of the a total amount of the catalyst in the dehydrogenation unit every 60 to 120 days of operating time and replacing the portion of the removed catalyst with fresh catalyst.
2 more elements
A process for dehydrogenation of a hydrocarbon feed comprising:
- providing a hydrocarbon feed stream comprising at least one paraffin to a dehydrogenation unit comprising a moving bed in a reactor, wherein the reactor comprises screens that contain catalyst bed in the reactor;
- contacting the hydrocarbon feed stream with a catalyst in the reactor under dehydrogenation conditions;
- removing an effluent stream comprising at least one olefin from the reactor;
- and
- periodically removing a portion of between 10 wt % and 20 wt % of a total amount of the catalyst in the dehydrogenation unit every 60 and 120 days of operating time and replacing the removed catalyst with fresh catalyst while continuing to operate the reactor at a 20-100% longer time between shutdowns for screen cleaning compared to operating the reactor without periodically removing the portion of between 10 wt % and 20 wt % of the total amount of the catalyst in the dehydrogenation unit every 60 to 120 days of operating time and replacing the portion of the removed catalyst with fresh catalyst.
2 more elements
A process for dehydrogenation of a hydrocarbon feed comprising:
- providing a hydrocarbon feed stream comprising at least one paraffin to a dehydrogenation unit comprising a moving bed in a reactor, wherein the reactor comprises screens that contain catalyst bed in the reactor;
- contacting the hydrocarbon feed stream with a catalyst in the reactor under dehydrogenation conditions;
- removing an effluent stream comprising at least one olefin from the reactor;
- and
- periodically removing a portion of between 5wt % and 50 wt % of a total amount of the catalyst in the dehydrogenation unit every 60 to 120 days of operating time and replacing the portion of the catalyst removed with fresh catalyst while continuing to operate the reactor at a 20-100% longer time between shutdowns for screen cleaning compared to operating the reactor without periodically removing the portion of between 5 wt % and 50 wt % of the total amount of the catalyst in the dehydrogenation unit every 60 to 120 days of operating time and replacing the portion of the removed catalyst with fresh catalyst;
- sensing one or more of a flow rate of the hydrocarbon feed stream, and a flow rate of the effluent stream;
- transmitting one or more of the flow rate of the hydrocarbon feed stream, and a flow rate of the effluent stream to a processor;
- analyzing one or more of the flow rate of the hydrocarbon feed stream, and the flow rate of the effluent stream to determine an activity rate of the catalyst;
- analyzing the activity rate of the catalyst and a cost of the catalyst to determine at least one of an amount of catalyst to remove and replace, and a time to initiate removing and replacing the catalyst;
- and
- adjusting the portion of the catalyst removed and replaced to a determined amount of catalyst, or removing and replacing the catalyst at a determined time.
8 more elements
Dependencies are inferred from the claim text.