Patent ID: 11866397
Assignee: SAUDI ARABIAN OIL COMPANY
Field: Chemical engineering (Chemistry)
Classification: CPC C  B | IPC B  C

Claim 9:
10. The process of claim 9, wherein:
the steam catalytic cracking reactor comprises a preheating zone and a reaction zone downstream of the preheating zone, wherein the preheating zone comprises an inert carrier and the reaction zone comprises the cracking catalyst; and
transitioning the process from the ethylene-selective mode to the propylene-selective mode comprises maintaining or adjusting a loading volume of the cracking catalyst in the reaction zone so that height to diameter ratio of the reaction zone in the steam catalytic cracking reactor is from 0.5 to 3.5, and adjusting the inert carrier pre-heating loaded volume to the cracking catalyst loading volume ranges from 0.1 to 4.