Patent ID: 6814941
Filing Date: 2004-11-09
Classification: B01J,B04C,C10G

Abstract:
A process for the fluidized catalytic cracking of a hydrocarbon feedstock comprising:passing a hydrocarbon feedstock and solid catalyst particles into a reaction conduit to produce a mixture of solid catalyst particles and gaseous fluids; inducing said mixture of said catalyst particles and gaseous fluids to swirl to decrease a catalyst particle concentration and increase a gaseous fluids concentration in said mixture; transporting said mixture through a gas recovery conduit; passing said mixture from said gas recovery conduit to at least one cyclone through a cyclone inlet having a short side and a long side, said short side being substantially tangential to a cross-sectional profile of said gas recovery conduit and said mixture passing from said gas recovery conduit into said at least one cyclone while swirling toward said long side of said cyclone inlet; inducing said mixture in said cyclone to swirl to further decrease the catalyst particle concentration and further increase the gaseous fluids concentration in said mixture.