Method and means for converting hydrocarbon in the presence of hydrogen in the conversion and regeneration zones

Claim 1

A METHOD FOR CONVERTING HYDROCARBONS WHICH COMPRISES CIRCULATING A HYDROCRACKING CATALYST FIRST THROUGH A DILUTE PHASE CATALYST CRACKING ZONE WITH HYDROGEN AND THEN WITH HYDROGEN THROUGH A DENSE PHASE CATALYST CRACKING ZONE, PASSING A HYDROCARBON REACTANT MATERIAL IN CONTACT WITH THE CATALYST IN THE DILUTE PHASE CRACKING ZONE COMBINED WITH HYDROGEN CONTAINING GASEOUS MATERIAL RECOVERED FROM SAID DENSE PHASE CATALYST CRACKING ZONE, PASSING AY INSUFFICIENTLY CONVERTED HYDROCARBON REACTANT FROM THE DILUTE PHASE CONTACT ZONE TO THE DENSE PHASE CONTACT ZONE AND MAINTAINING HYDROCRACKING SEVERITY CONDITIONS IN SAID DENSE PHASE CONTACT ZONE GENERALLY MORE SEVERED THAN THE CONVERSION CONDITIONS MAINTAINED IN SAID DILUTE PHASE CONTACT ZONE.