Patent ID: 9567531
Date: 2017-02-14
CPC Classifications: C10G,C10L

Claim:
1. A fluid catalytic cracking process comprising: feeding a feedstock for a first cracking to a first fluid catalytic cracker having a reaction zone, a separation zone, a stripping zone, and a regeneration zone; catalytically cracking the feedstock in the first fluid catalytic cracker in the presence of a cracking catalyst containing an ultrastable Y-type zeolite having a Si/Al ratio of 7 to 15 under reaction conditions to produce a cracked product; collecting a fraction having a boiling range of 221 to 343° C., a density at 15° C. less than 0.95 g/cm feeding the fraction for a second cracking to a second fluid catalytic cracker having a reaction zone, a separation zone, a stripping zone, and a regeneration zone; and catalytically cracking the fraction in the reaction zone of the second fluid catalytic cracker, in the presence of a cracking catalyst, at a reaction zone outlet temperature of 550 to 650° C., a contact time between the oil and the catalyst of 0.1 to 1 second, and a catalyst/oil ratio of 20 to 40 wt/wt.