Production of aromatic tar

Claim 1

A PROCESS OF PRODUCING AROMATIC TAR SUITABLE FOR THE MANUFACTURE OF CARBON BLACK, WHICH COMPRISES CATALYTICALLY CRACKING A VIRGIN GAS OIL TO FORM CRACKED PRODUCTS INCLUDING MOTOR FUELS, OILS OF INTERMEDIATE BOILING RANGE AND A CATALYTIC CYCLE OIL OF RELATIVELY HIGH BOILING RANGE, SUBJECTING AT LEAST A PORTION OF SAID CYCLE OIL TO THERMAL CRACKING AT A TEMPERATURE OF 935*-950* F. AND A PRESSURE OF ABOUT 300-600 P.S.I.G., SEPARATING VAPOROUS FROM LIQUIID CRACKING PRODUCTS IN A SEPARATING ZONE AT AN ELEVATED PRESSURE SUBSTANTIALLY LOWER THAN SAID FIRST-NAMED PRESSURE, SEPARATELY WITHDRAWING FROM SAID SEPARATING ZONE VAPORS AT A TEMPERATURE OF 800-820* F. AND LIQUID AT A TEMPERATURE OF 790*-810* F., FLASHING AND STEAM STRIPPING SAID WITHDRAWN LIQUID AT ABOUT ATMOSPHERIC PRESSURE IN A FLASHING ZONE, SEPARATELY WITHDRAWING FROM SAID FLASHING ZONE VAPORS AT A TEMPERATURE OF ABOUT 730* F. AND LIQUID AT A TEMPERATURE OF ABOUT 570* F., AND RECOVERING SAID AROMATIC TAR IN THE FROM OF SAID LAST-NAMED WITHDRAWN LIQUID.