Fluid catalytic cracking system and process
AssigneeUop LLC
InventorsRobert L. Mehlberg, Lawrence L. Upson, James P. Glavin
Life of this patent
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Abstract
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.
Claims20
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
- B) a second reaction vessel containing the second catalyst wherein at least a portion of the second catalyst is directly communicated with the first reaction vessel.
A fluid catalytic cracking system, comprising:
- A) a first reaction zone operating at a conversion rate of no more than about 80%, by weight, based on a fresh feed for producing C3-C10 olefins;
- B) a second reaction zone wherein the second reaction zone receives another feed at least partially comprised of one or more C4-C10 olefins produced by the first reaction zone;
- and
- C) a regeneration zone communicating with the first reaction zone to regenerate a catalyst mixture from the first reaction zone.
A process for generating propylene in a system, comprising:
- A) communicating a first reaction vessel with a regeneration zone and a second reaction vessel wherein the first reaction vessel contains 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 the second reaction vessel contains only the second catalyst for catalyzing at least one reaction.
Dependencies are inferred from the claim text.