Art of coking

Claim 1

A METHOD FOR COOKING HYDROCARBON OILS WHICH COMPRISES MAINTAINING IN A REACTION ZONE AND AT A TEMPERATURE OF THE ORDER OF ABOUT 800* F. TO 1200*F. A DENSEPHASE FLUIDIZED BED OF COKE PARTICLES COMPRISING COKE PARTICLES OF VARIOUS SIZES, INTRODUCING A HYDROCARBON OIL TO THE BED OF COKE PARTICLES, INTRODUCING A FLUIDIZING MEDIUM TO THE BED OF COKE PARTICLES AT A RATE SUCH THAT THE VELOCITY OF THE VAPORS RISING THROUGH THE BED OF THE COKE PARTICLES IS SUCH AS TO MAINTAIN THE BED OF COKE PARTICLES IN A DENSE-PHASE FLUIDIZED STATE, REMOVING VAPORIZED MATERIALS FROM THE REACTION ZONE, WITHDRAWING FROM THE COKE BED SUBSTANTIALLY ONLY THE LARGE PARTICLES IN AN AMOUNT SUFFICIENT TO MAINTAIN AN EQUILIBRIUM OF THE VARYING PARTICLE SIZES IN THE BED TO MAINTAIN EFFECTIVE FLUIDIZATION AND PERMITTING THE WITHDRAWAL PARTICLES TO SETTLE THROUGH THE ELUTRIATING MEDIUM FLOWING AT A VELOCITY GREATER STREAM OF ELUTRIATING MEDIUM FLOWING AT A VELOCITY GREATER THAN THE VELOCITY OF THE VAPORS RISING THROUGH THE BED OF COKE PARTICLES BUT NOT EXCEEDING THAT AT WHICH THE LARGE COKE PARTICLES WILL SETTLE THROUGH THE ELUTRIATING ZONE, AND REMOVING FROM THE ELUTRIATING ZONE THE LARGE PARTICLES WHICH HAVE SETTLE THERETHROUGH.

Claim 2

A METHOD FOR COOKING HYDROCARBON OILS WHICH COMPRISES MAINTAINING IN A REACTION ZONE AND AT A TEMPERATURE OF THE ORDER OF ABOUT 800* F. TO 1200*F. A DENSEPHASE FLUIDIZED BED OF COKE PARTICLES COMPRISING COKE PARTICLES OF VARIOUS SIZES, INTRODUCING A HYDROCARBON OIL TO THE BED OF COKE PARTICLES, INTRODUCING A FLUIDIZING MEDIUM TO THE BED OF COKE PARTICLES AT A RATE SUCH THAT THE VELOCITY OF THE VAPORS RISING THROUGH THE BED OF THE COKE PARTICLES IS SUCH AS TO MAINTAIN THE BED OF COKE PARTICLES IN A DENSE-PHASE FLUIDIZED STATE, REMOVING VAPORIZED MATERIALS FROM THE REACTION ZONE, WITHDRAWING FROM THE COKE BED SUBSTANTIALLY ONLY THE LARGE PARTICLES IN AN AMOUNT SUFFICIENT TO MAINTAIN AN EQUILIBRIUM OF THE VARYING PARTICLE SIZES IN THE BED TO MAINTAIN EFFECTIVE FLUIDIZATION AND PERMITTING THE WITHDRAWAL PARTICLES TO SETTLE THROUGH THE ELUTRIATING MEDIUM FLOWING AT A VELOCITY GREATER STREAM OF ELUTRIATING MEDIUM FLOWING AT A VELOCITY GREATER THAN THE VELOCITY OF THE VAPORS RISING THROUGH THE BED OF COKE PARTICLES BUT NOT EXCEEDING THAT AT WHICH THE LARGE COKE PARTICLES WILL SETTLE THROUGH THE ELUTRIATING ZONE, AND REMOVING FROM THE ELUTRIATING ZONE THE LARGE PARTICLES WHICH HAVE SETTLE THERETHROUGH.