Patent ID: 9745519
Date: 2017-08-29
CPC Classifications: B01J,C07C,C10G

Claim:
1. A method for fluidized catalytic cracking, comprising: cracking a mixed C4 feed stream in the presence of a catalyst under conditions sufficient to produce an effluent comprising ethylene, propylene, gasoline, and a coked-catalyst, wherein the catalyst comprises a first catalytic component having an average pore size of less than 6.4 Å and a second catalytic component having an average pore size of 6.4 Å or more; separating the effluent to provide a recovered coked-catalyst and a cracked product, wherein the coked-catalyst comprises between 1.5% and 5% coke by weight of the mixed C4 feed stream; and regenerating the recovered coked-catalyst to produce heat and the catalyst.