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Process for catalytic cracking two integrated cracking zones of different degrees of severity followed by a cooling zone
Process for catalytic cracking two integrated cracking zones of different degrees of severity followed by a cooling zone
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机译:催化裂化两个不同严重程度的集成裂化区,然后进行冷却区的工艺
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摘要
The invention consists in implanting an inner tube fed at its lower portion by a fraction of regenerated catalyst inside a riser (1) of an FCC unit that is fed by catalyst via a line (14) and a feedstock via a line (3), whereby the fluid that allows this feed can be inert, in which case a staging effect of the catalyst inside the riser or else a feedstock (14) that has a tendency toward a more severe cracking inside the inner tube, then leading to an additional production of olefins, in particular propylene, is advantageous. The mixtures of fluids and catalyst are cooled above the tube via a line (13) of an inert fluid.
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