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

Claim 5:
6. The process of claim 5, 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 propylene-selective mode to the ethylene-selective mode comprises: maintaining or adjusting a loading volume of the cracking catalyst in the reaction zone so that a ratio of height to diameter 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 6.