PROCESS AND APPARATUS FOR HEATING CATALYST IN A REGENERATOR

摘要

A process and apparatus for heating catalyst is presented. Cooler catalyst is removed from a reactor and heated with a hot gas in a riser, heated in a heating tube or heated in a heating chamber. Heated catalyst is disengaged from the hot gas if necessary and returned to the reactor. The process and apparatus can be used for producing light olefins. The hot gas may be a flue gas from an FCC regenerator or a combustion gas from a heater.

主权项

1. A process for heating a catalyst bed to promote a reaction comprising:
regenerating a first catalyst stream in a regenerator to produce regenerated first catalyst stream and a first flue gas stream; withdrawing said regenerated first catalyst stream from said regenerator; passing a hydrocarbon feed stream to a reactor vessel to react over a catalyst bed in the reactor vessel and produce a product gas; withdrawing said product gas stream from the reactor vessel; withdrawing a second catalyst stream from the reactor vessel; passing the second catalyst stream to said regenerator; isolating said second catalyst stream from said first catalyst stream in said regenerator; heating the second catalyst stream in the regenerator to produce a heated second catalyst stream; withdrawing the heated second catalyst stream from said regenerator separately from said regenerated first catalyst stream; and passing the heated second catalyst stream to the reactor vessel.