Process of cracking

Claim 1

PROCESS FOR SIMULTANEOUSLY CONVERTING A HEAVY PETROLEUM RESIDUAL FRACTION AND A PETROLEUM STRAIGHT RUN PARAFFINIC NAPHTHA TO LOWER BOILING HYDROCARBONS WHICH COMPRISES: (A) HEATING A HEAVY PETROLEUM RESIDUAL FRACTION, MAINTAINED IN THE LIQUID PHASE, TO A TEMPERATURE WHICH IS BELOW ITS CRACKING TEMPERATURE AND WHICH IS WITHIN THE RANGE OF FOR ABOUT 650 TO 900*F., (B) HEATING A REFRACTORY AROMATIC FRACTION, MAINTAINED IN THE LIQUID PHASE, TO A TEMPERATURE WITHIN THE RANGE OF FROM 1000 TO 1300*F.; (C) HEATING A STRAIGHT RUN PETROLEUM PARAFFINIC NAPHTHA BOILING ABOVE ABOUT 130*F., MAINTAINED IN THE LIQUID PHASE, TO THE TEMPERATURE AT WHICH INCIPIENT CRACKING OCCURS AND WHICH IS WITHIN THE RANGEOF FROM 675 TO 950*F.; SUBSTANTIALLY SIMULTANEOUSLY ADMIXING LIQUID STREAMS OF THE THREE SO-HEATED MATERIALS AT RATES SUCH THAT THE TEMPERATURE OF THE RESULTING ADMIXTURE IS ABOVE THE CRACKING TEMPERATURE OF THE RESIDUAL FRACTION AND THE PARAFFINIC NAPHTHA, WHEREBY A PORTION OF SAID RESIDUAL FRACTION AND A PORTION OF SAID PARAFFINE NAPHTHA ARE CONVERTED TO LOWER BOILING HYDROCARBONS WITHOUT CONCOMIFANT COKE FORMATION, AND SEPARATING SAID LOWER BOILING HYDROCARBONS FROM THE REACTION MIXTURE.