Production of fuel gas and liquid hydrocarbon fuels

Claim 1

A PROCESS FOR INCREASING THE HEATING VALUE OF A SPENT REGENERATION GAS OF RELATIVELY LOW B.T.U. VALUE OBTAINED FROM THE REGENERATIONOF A CONTACT MASS, WHICH HAS BECOME COATED WITH COKE DURING THE CRACKING OF A GAS OIL THEREWITH AT A CRACKING TEMPERATURE DURING A CONTACT OF TIME LENGTH SUFFICIENT TO CAUSE A DESIRED CONVERSION PER PASS, SAID REGENERATION BEING EFFECTED BY CONTACTING SAID MASS AT ELEVATED TEMPERATURE WITH AN OXYGEN-CONTAINING MEDIUM, RESULTING IN SAID GAS, CONTINING CO2 AND CO, THE CO2 BEING PRESENT IN PREPONDERANCE OVER THE CO, WHICH COMPRISES THE STEPS OF USING SAID GAS IN A REGENERATION ZONE OPERATED AT A TEMPERATURRE IN THE RANGE 1030-1150*F. TO REGENERATE A SECOND CONTACT MASS, WHICH HAS BECOME COATED WITH COKE DURING THE COKING OF A RESIDUAL HYDROCARBON OIL TO CONVERT SAID OIL TO DESIRABLE DISTILLATE FRACTIONS, AND TO COKE WITH DEPOSITS ON SAID SECOND CONTACT MASS, CONDUCTING SAID REGENERATION OF SAID SECOND CONTACT MASS UNDSER CONDITIONS SO AS TO CAUSE CONVERSION OF CO2 IN SAID GAS TO CO INCREASING THE TOTAL CO IN SAID GAS TO AN EXTENT SUCH THAT IT IS IN PREPONDERANCE OVER THE CO2 THEREIN, AND RECOVERING SAID GAS AS A GAS OF SUBSTATIALLY INCREASED HEATING VALUE.