Patent ID: 9605213
Date: 2017-03-28
CPC Classifications: B01J,C07C,C10G

Claim:
1. A method for the fluid catalytic cracking of a heavy hydrocarbon feedstock, the method comprising: supplying the heavy hydrocarbon feedstock to a reaction zone comprising a catalyst, such that both the heavy hydrocarbon feedstock and the catalyst are in contact in a down-flow mode, wherein said contact between the heavy hydrocarbon feedstock and the catalyst takes place in a fluidized catalytic cracking apparatus comprising a separation zone, a stripping zone, and a regeneration zone; and maintaining the reaction zone at a temperature of between 500 and 600° C., such that the hydrocarbon feedstock converts into a cracked hydrocarbon effluent comprising light olefins, gasoline, and diesel, wherein the catalyst comprises 30% by weight of a phosphorous modified sub-micron ZSM-5, 10% by weight of an ultra-stable Y-type zeolite, 20% by weight of a pseudoboehmite alumina, and 40% by weight of kaolin, and wherein the phosphorous modified sub-micron ZSM-5 has an average crystal size between 50 and 400 nm, inclusive, and a silica to alumina ratio of 1:2 to 1:4, inclusive.