Fluid catalytic cracking system and process

摘要

One exemplary embodiment can be a fluid catalytic cracking system. Generally, the fluid catalytic cracking system includes a first reaction vessel and a second reaction vessel. The first reaction vessel may contain a first catalyst having pores with openings greater than about 0.7 nm and a second catalyst having pores with smaller openings than the first catalyst. What is more, the second reaction vessel may contain the second catalyst. Generally, at least a portion of the second catalyst is directly communicated with the first reaction vessel.

主权项

1. A fluid catalytic cracking system, comprising:
A) a first reaction vessel containing a first catalyst having pores with openings greater than about 0.7 nm and a second catalyst having pores with smaller openings than the first catalyst and a first riser terminating in said first reaction vessel; and B) a second reaction vessel containing only the second catalyst for catalyzing at least one reaction wherein at least a portion of the second catalyst is directly communicated with the first reaction vessel through a line and a recycle line that recycles a second portion of the second catalyst to the second reaction vessel and a second riser terminating in said second reaction vessel.