METHODS AND APPARATUS FOR CATALYTIC CRACKING

摘要

The present disclosure provides methods and apparatus for catalytic cracking of hydrocarbon feed. The apparatus includes a plurality of stages, wherein hydrocarbon feed is introduced into a bottom stage reactor and flows in an overall upward direction. A reaction catalyst stream is introduced into a top stage reactor and flows in an overall downward direction. In each of the stages, the hydrocarbon feed is allowed to come in contact with the reaction catalyst stream received at the particular stage for cracking of the hydrocarbon feed. The final cracked product stream is obtained at an outlet of the top stage reactor and a final spent catalyst stream is obtained at an outlet of the bottom stage reactor.

主权项

1. A method for catalytic cracking, the method comprising:
introducing a hydrocarbon feed into a bottom stage reactor of a plurality of reactor stages, wherein the hydrocarbon feed flows successively from the bottom stage reactor to a top stage reactor in an upward direction; introducing a reaction catalyst stream into the top stage reactor of the plurality of reactor stages, wherein the reaction catalyst stream flows successively from the top stage reactor to the bottom stage reactor in a downward direction; and in each of the plurality of reactor stages,
allowing the hydrocarbon feed received at a particular reactor to come in contact with the reaction catalyst stream received at the particular reactor for cracking of the hydrocarbon feed;allowing the hydrocarbon feed including cracked products to exit the particular reactor in the upward direction to the next stage reactor; andallowing the reaction catalyst stream including spent catalyst to exit the particular reactor in the downward direction to the next stage reactor,wherein a final cracked product stream is obtained at an outlet of the top stage reactor and a final spent catalyst stream is obtained at an outlet of the bottom stage reactor.