Fluidized bed coking process

Claim 1

A PROCESS FOR CONVERTING HYDROCARBONS TO PRODUCE LOWER BOILING HYDROCARBONS AND SOLID COKE PARTICLES OF A SIZE LARGER THAN FLUIDIZABLE SIZE WHICH COMPRISES PASSING COKE AGGLOMERATES DOWN THROUGH A HOT FLUIDIZED BED OF COKE PARTICLES, INTRODUCING HYDROCARBON OIL, FEED INTO SAID FLUIDIZED BED TO CRACK THE HYDROCARBON OIL, PASSING CRACKED VAPOROUS PRODUCTS OVERHEAD, REMOVING COKE AGGLOMERATES FROM SAID FLUID BED AND PASSING THEM DOWN THROUGH A HEAT EXCHANGER ZONE IN COUNTERCURRENT CONTACT WITH SAID WITHDRAWN CRACKED VAPOROUS PRODUCTS TO COOL SAID CRACKED VAPOROUS PRODUCTS AND TO HEAT SAID COKE AGGLOMERATES WHILE CONDENSING AND DEPOSITING HIGHER BOILING HYDROCARBONS FROM SAID CRACKED VAPOROUS PRODUCTS ON SAID COKE AGGLOMERATES, WITHDRAWING RESULTING CRACKED VAPOROUS PRODUCTS AS PRODUCT, RECIRCULATING THE SO TREATED COKE AGGLOMERATES A NUMBER OF TIMES THROUGH SAID HEAT EXCHANGE ZONE TO DEPOSIT HYDROCARBONS AND THROUGH SAID HOT FLUIZIDED COKE BED TO COKE THE DEPOSITED HIGH BOILING HYDROCARBONS AND TO INCREASE THE SIZE OF THE COKE AGGLOMERATES, WITHDRAWING COKE AGGLOMERATES OF INCREASED SIZE AS PRODUCT FROM THE SYSTEM.