Method and apparatus for making a middle distillate product and lower olefins from a hydrocarbon feedstock

A process, comprising:

• contacting a gas oil feedstock within a riser reactor zone under suitable catalytic cracking conditions with a cracking catalyst and yielding a riser reactor product comprising a cracked gas oil product and a spent cracking catalyst;
• separating said riser reactor product into said cracked gas oil product and said spent cracking catalyst;
• regenerating said spent cracking catalyst to yield a regenerated cracking catalyst;
• splitting said regenerated cracking catalyst into at least a portion of said regenerated cracking catalyst and a remaining portion of said regenerated cracking catalyst;
• passing said at least a portion of said spent cracking catalyst to a dense bed reactor zone wherein said at least a portion of said spent cracking catalyst is contacted under suitable high severity cracking conditions with a gasoline feedstock to yield a cracked gasoline product and a used regenerated cracking catalyst;
• and
• using said remaining portion of said regenerated cracking catalyst and said used regenerated cracking catalyst as said cracking catalyst.

An apparatus, comprising:

• riser reactor means for contacting a gas oil feedstock with a catalytic cracking catalyst under catalytic cracking conditions to yield a riser reactor product comprising a cracked gas oil product and a spent cracking catalyst;
• separator means for separating said riser reactor product into said cracked gas oil product and said spent cracking catalyst;
• regenerator means for regenerating said spent cracking catalyst to yield a regenerated catalyst;
• dense bed reactor means for contacting a gasoline feedstock with said regenerated catalyst under high severity conditions to yield a cracked gasoline product and a used regenerated catalyst;
• and
• means for providing for the use of said used regenerated catalyst as said catalytic cracking catalyst.