Visbreaking of reduced crude in the presence of light catalytic cycle stock

Claim 1

A PROCESS FOR THE THERMAL CONVERSION OF PETROLEUM HYDROCARBONS COMPRISING VACUUM DISTILLING A PETROLEUM OIL TO FORM A HEAVY RESIDUE AS A BOTTOMS PRODUCT HAVING A GRAVITY IN *API OF LESS THAN 10, CONRADSON CARBON RESIDUE NUMBER OF AT LEAST 18, AND AN SUS VISCOSITY AT 210*F. OF AT LEAST 6000, MIXING THE RESIDUE WITH A LIGHT CATALYTIC CYCLE OIL HAVING A BOILING RANGE OF APPROXIMATELY 400-650*F. TO FORM A MIXTURE HAVING A RATIO OF RESIDUE TO LIGHT CATALYTIC CYCLE OIL RANGING FROM 1:2 TO 6:1, HEATING THE MIXTURE TO A TEMPERATURE OF 900 TO 1000*F. IN A SHORT PERIOD TO CARACK RESIDUE AND LIGHT CATALYTIC CYCLE OIL IN THE MIXTURE, SEPARATING THE CARACKED PRODUCTS INTO FUEL OIL AND VAPOR PHASE, FRACTIONATING THE VAPOR PHASE TO PRODUCE GASOLINE AND A RECYCLE OIL HAVING A HIGHER BOILING RANGE THAN GASOLINE S SEPARATE FRACTIONS, AND RETURNING RECYCLE OIL TO THE MIXTURE FOR HEATING TO CARACKING TEMPERATURES.