Patent ID: 6610255
Filing Date: 2003-08-26
Classification: B01J,C10G

Abstract:
A fluidized catalytic cracking (FCC) system comprising a fluidized catalytic cracking reactor including a catalyst, a regenerator connected to said reactor for removing coke from said catalyst, an outboard vessel containing a vanadium trapping material having a particle size from about 0.1 mm to about 5 mm in diameter, and a means for continuously transferring said catalyst to said vessel and back to the regenerator said means including an angled-transfer line from the regenerator to said vesel wherein said trapping material remains in said outboard vessel as said catalyst continuously moves between said vessel and said regenerator at a flow rate through said outboard vessel of between about 300 and 50,000 tons/day, wherein said angled-transfer line includes a bubble-up purge with steam and/or air to ensure that SOx partial pressure is at a minimum in said vessel.