Two-stage residuum coking conversion process

Claim 1

A TWO-STAGE COMBINATION FUELS AND CHEMICALS COKING PROCESS FOR CONVERTING HEAVY HYDROCARBON OILS BOILING MOSTLY ABOVE 900*F., AND WHICH PRODUCE GAS OILS OF UNSATIFACTORY CATALYTIC CRACKING QUALITY UPON COKING WHICH COMPRISES COKING A HEAVY OIL BOILING MOSTLY ABOVE 900*F. IN A DENSE FLUIDIZED SOLIDS FUELS COKING ZONE CONTAINING FINELY DIVIDED COKE PARTICLES AT A TEMPERATURE IN THE RANGE OF ABOUT 900*F. TO 1100*F., TO PRODUCE VAPOROUS CONVERSION PRODUCTS AND COKE AT A 430* F. CONVERSION IN THE RANGE OF 30 TO 60 VOL. PERCENT AND RECOVERING FROM SAID VAPOROUS CONVERSION PRODUCTS LIGHT DISTILLATE HYDROCARBON PRODUCTS HOILING BELOW ABOUT 700* F., HEAVY ENDS BOILING ABOVE ABOUT 1000*F. AND A GAS OIL FRACTION BOILING IN A RANGE OF ABOUT 700* F. TO 1000*F., THEN CRACKING SAID GAS OIL FRACTION BY CONTACT WITH FINELY DIVIDED COKE AT A HIGHER TEMPERATURE THAN SAID FIRST STAGE AND IN THE RANGE OF ABOUT 1200* F. TO 1600*F. FOR A RELATIVELY SHORT TIME IN A SEPARATE UPFLOW VERTICALLY ARRANGED CHEMICALS TRANSFER LINE COOKING ZONE TO PRODUCE NORMALLY GASEOUD UNSATURATED HYDROCARBONS SUISTABLE AS CHEMICALS AND CHEMICAL INTERMEDIATES AT A C3- CONVERSSION IN THE RANGE OF 50 TO 80 WT PERCENT AND CIRCULATING SAID FINELY DIVIDED COKE FROM EACH OF SAID COOKING ZONES TO A HEATING ZONE WHEREIN THE PARTICLES ARE REHEATED BY PRTIAL COMBUSTION AND BACK TO MAINTAIN THE RESPECTIVE REACTION TEMPERATURE IN SAID ZONES.