| 摘要 |
<p>A catalytic cracking process is provided for cost effectively separating and stripping hydrocarbon from catalyst while limiting the occurrence of undesired catalytic overcracking and thermal cracking reactions. The process includes the steps of contacting feed with catalyst, grossly separating the larger coked catalyst particles from the hydrocarbon, disengaging the smaller coked catalyst fines from the hydrocarbon, removing volatile hydrocarbon from the grossly separated and disengaged catalyst, and recycling the volatile hydrocarbon back to the gross separating step. The disengager step includes the steps of dampening the flow of grossly separated hydrocarbon and internally cyclone separating the smaller catalyst fines from the hydrocarbon product.</p> |
