US 11,478,769 B2 · Reactor systems comprising fluid recycling

Abstract

A method for processing a chemical stream includes contacting a feed stream with a catalyst in an upstream reactor section of a reactor having the upstream reactor section and a downstream reactor section, passing an intermediate product stream to the downstream reactor section, and introducing a riser quench fluid into the downstream reactor section, upstream reactor section, or transition section and into contact with the intermediate product stream and the catalyst to slow or stop the reaction. The method includes separating at least a portion of the catalyst from the product stream, passing the product stream to a product processing section, cooling the product stream, and separating a portion of the riser quench fluid from the product stream. The riser quench fluid separated from the product stream may be recycled back to the downstream reactor section, upstream reactor section, or transition section as the riser quench fluid.

Claims19

Dependent claims

A method for processing a chemical stream, the method comprising:

contacting a feed stream with a catalyst in a reactor system, wherein the contacting of the feed stream with the catalyst causes a reaction which forms a product stream;
separating at least a portion of the catalyst from the product stream in a catalyst separation section downstream of the reactor;
after separating at least a portion of the catalyst from the product stream, passing at least a portion of the product stream to a product processing section;
introducing a product quench fluid to the product processing section, where the product quench fluid cools the at least a portion of the product stream in the product processing section and removes catalyst fines from the at least a portion of the product stream to produce a processed product stream and a quench fluid stream, wherein the quench fluid stream comprises the product quench fluid and the catalyst fines;
concentrating the catalyst fines from the product quench fluid;
and
passing the catalyst fines back to the reactor system.

4 more elements

A system for processing a chemical stream, the system comprising:

a reactor portion of a reactor system, the reactor portion comprising:
a reactor;
and
a separation device operable to separate a catalyst from a product stream;
a catalyst processing portion comprising:
a combustor configured to receive catalyst from the separation device;
and
a separation section downstream of the combustor and configured to separate the catalyst from a combustion gas;
a product processing section comprising a product stream inlet in fluid communication with the separation device, a quench fluid inlet operable to introduce a product quench fluid to the product processing section, a processed product stream outlet operable to pass a processed product stream out of the product processing section, and a quench fluid outlet;
wherein the product processing section is operable to:
reduce a temperature of the product stream;
or
remove catalyst fines and other particulate solids from the product stream that were not separated from the product stream in the catalyst separation section.

10 more elements

Dependencies are inferred from the claim text.

Reactor systems comprising fluid recycling

Life of this patent

Reactor systems comprising fluid recycling

Life of this patent

Abstract

Claims19