Process and apparatus for reacting feed with a fluidized catalyst with a reduction in catalyst loss during startup
AssigneeUop LLC
InventorsRichard A. Johnson, II, John J. Senetar, Sathit Kulprathipanja, Adam J. Kanyuh
Life of this patent
Estimating the term…
Abstract
A fluidized catalytic reactor connected to a start-up heater is provided. The start-up heater provides sufficient heat to a catalyst containing stream to gradually increase the feed temperature. This allows for a critical volumetric flow rate to be achieved so that catalyst can be recovered from product instead of being entrained in product.
Claims11
A reactor system comprising:
- a. a reactor for contacting a reactant stream with a catalyst;
- b. a start-up heater having lines for the reactant stream to be sent to said reactor;
- and
- c. a valve configured to receive a stream obtained from a feed-effluent heat exchanger,
- wherein said start-up heater provides sufficient heat to fluidize said catalyst sufficiently to allow for at least a 3 ft/sec superficial gas velocity in said reactor.
A process of start-up of a reactor comprising circulating a portion of a feed through a start-up heater to heat said feed to a temperature of at least 240° C. before a heated catalyst feed is sent from a regeneration unit to said reactor,
- wherein said start-up heater provides sufficient heat to fluidize said heated catalyst feed sufficiently to allow for at least a 3 ft/sec superficial gas velocity in said reactor.
Dependencies are inferred from the claim text.