Patent ID: 7479218
Filing Date: 2009-01-20
Classification: B01J,C10G

Abstract:
1. A method for converting a fluid catalytic cracking system to an improved deep catalytic cracking system comprising the steps of: (a) removing a middle section of an existing riser reactor in the fluid catalytic cracking system to produce a lower first narrower catalytic cracking riser reactor section that catalytically cracks a hydrocarbonaceous feedstock in the first carcking zone to produce an intermediate cracked product rich in gasoline, and that has a radius x, a means for feeding said hydrocarbon feedstock, a means for feeding cracking catalyst located in a lower portion thereof, and an upper riser product conduit having connection to a cracked product/spent catalyst separation means; and (b) replacing said removed middle riser reactor section with a second wider riser catalytic cracking reactor section that cracks said intermediate cracked product in a second cracking zone to produce high yields of C