Catalytic cracking apparatus

Claim 1

APPARATUS FOR THE CATALYTIC CRACKING OF HYDROCARBON OILS COMPRISING IN COMBINATION A FLUIDIZED CATALYST REGENERATOR VESSEL, A SEPARATE CATATYST SEPARATOR-HOPPER VESSEL, A SEPARATE CATALYST STRIPPER VESSEL, AND A SEPARATE FLUIDIZED CATALYST REACTOR VESSEL, EACH ESSNTIALLY VERTICALLY DISPOSED AND ARRANGED IN PLAN IN A FQUADRANGLE, SAID CATALYST SEPARATOR-HOPPER VESSEL BEING PROVIDED WITH A STRANDPIPE LINE DEBOUCHING WITHIN SAID FLUIDIZED CATALYST REACTOR NEAR THE BOTTOM THEREOF, SAID FLUIDIZED CATALYST REACTOR BEING PROVIDED WITH AN INCLINED STANDPIPE LINE COMMUNICATING AT AN ACUTE ANGLE WITH A SUBSTANTIALLY VERTICAL RISER LINE WHICH LATTER DEBOUCHES WITHIN SAID STRIPPER VESSEL ABOVE THE NORMAL CATALYST BED HEIGHT THEREIN, SAID STRIPPER VESSEL BEING PROVIDED WITH AN INCLINED STANDPIPE LINE PROVIDED WITH A FLOW CONTROL VALVE AND COMMUNICATTING AT AN ACUTE ANGLE WITH A SUBSTANTIALLY VERTICAL RISER LINE DEBOUCHING WITHIN SAID FLUIDIZED CATALYST REGENERATOR VESSEL ABOVE THE NORMAL CATALYST BED HEIGHT THEREIN, AND SAID FLUIDIZED CATALYTIC REGENERATOR VESSEL BEING PROVIDED WITH AN INCLINED STANDPIPE HAVING A FLOW CONTROL VALVE AND COMMUNICATING AT AN ACUTE ANGLE WITH A SUBSTANTIALLY VERTICAL RISER LINE DEBOUCHING WITHIN SAID CATALYST SEPARATOR-HOPPER VESSEL THEREBY TO COMPLETE A CYCLE PATH FOR CATALYST FLOW.