Patent ID: 8529754

Claim:
A catalytic conversion process for producing more diesel and propylene, characterized in contacting the feedstock oil with a catalytic cracking catalyst in a catalytic cracking reactor, wherein the reaction temperature, weight hourly space velocity and weight ratio of the catalyst/feedstock oil are sufficient to obtain a reaction product containing from 12 to 60% by weight of a fluid catalytic cracking gas oil relative to the weight of the feedstock oil; the weight hourly space velocity is from 25 to 100 h −1 ; the reaction temperature ranges from 450 to 600° C.; the weight ratio of the catalytic cracking catalyst/feedstock oil is 1-30; and the fluid catalytic cracking gas oil is fed into at least one of a hydrogenation device, a solvent extraction device and a hydrocracking device for further processing, wherein the catalytic cracking catalyst in the catalytic cracking reactor has a coarse particle size distribution, and wherein less than 10 vol. % of the catalytic cracking catalyst particles have a particle size of less than 40 μm relative to the volume of all the catalytic cracking catalyst particles, less than 15 vol. % of the catalytic cracking catalyst particles have a particle size of greater than 80 μm relative to the volume of all the catalytic cracking catalyst particles, and the remaining are the catalytic cracking catalyst particles having a particle size of from 40 to 80 μm.