Catalytic cracking process

Claim 1

A PROCESS OF CRACKING A GAS OIL IN A REACTION ZONE IN THE PRESENCE OF A CATALYST CONSISTING ESSENTIALLY OF SILICA-ALUMINA CRACKING CATALYST WHICH COMPRISES ADMIXING IN A FLUID TRANSPORT ADMIXING ZONE ALL OF THE CATALYST AND SUBSTANTIALLY ALL OF THE STEAM TO BE USED IN THE CONVERSION ZONE OF THE PROCESS IN AN APPROXIMATE RATIO OF 1,000 TONS CATALYST PER HOUR AND 24,000 POUNDS STEAM PER HOUR, UNDER CONVERSION CONDITIONS ADDING TO SAID ADMIXING ZONE INCREMENT-WISE 1,600 BARRELS OF SAID OIL PER HOUR TO THE ADMIXTURE OF STEAM AND CATALYST AT SPACED POINTS ALONG SAID ADMIXING ZONE SUCH THAT IT TAKES THE MIXTURE IN SAID ADMIXING ZONE APPROXIMATELY 0.25 SECONDS TO TRAVEL THE DISTANCE BETWEEN THE FIRST AND THE LAST OF SAID SPACED POINTS, THEN MAINTAINING THE CATALYSTSTEAM-OIL MIXTURE THUS OBTAINED, AS SUCH, IN SAID MIXING ZONE, FOR APPROXIMATELY 0.75 SECONDS, THEN ADDING SAID MIXTURE TO SAID REACTION ZONE CONTAINING A LARGER QUANTITY OF CATALYST-STEAM-OIL MIXTURE EARLIER SIMILARLY OBTAINED AND NOW IN SAID ZONE, MAINTAINING THE LARGER OVERALL ADMIXTURE THUS OBTAINED IN SAID ZONE FOR AN ADDITIONAL APPROXIMATELY 10 SECONDS, THAN OPERATING CATALYST FROM THE CONVERTED OIL PRODUCTS AND RECOVERING SAID OIL PRODUCTS.