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

Claim 17:
18. The process of claim 17, where regenerating the cracking catalyst comprises:
evacuating hydrocarbons and steam from the steam catalytic cracking reactor;
passing an oxygen-containing gas to the steam catalytic cracking reactor at a gas hourly space velocity (GHSV) of from 10 per hour to 100 per hour;
contacting the cracking catalyst with the oxygen-containing gas at a regeneration temperature of from 600° C. to 750° C. for a regeneration period of from 2 hours to 6 hours, where the contacting causes combustion of coke deposits on the cracking catalyst;
venting the oxygen-containing gas from the steam catalytic cracking reactor;
analyzing the oxygen-containing gas vented from the steam catalytic cracking reactor to determine a concentration of carbon dioxide in the oxygen-containing gas vented from the steam catalytic cracking reactor;
determining when regeneration is completed based on the concentration of carbon dioxide in the oxygen-containing gas vented from the steam catalytic cracking reactor;
after determining when the regeneration is completed, ceasing the flow of oxygen-containing gas to the steam catalytic cracking reactor; and
and restarting flow of the hydrocarbon feed.