Process for decoking fluid catalytic cracking catalyst
Patent
·
OSTI ID:5716893
This patent describes an improvement in a fluidized catalytic cracking process wherein a coke contaminated, spent cracking catalyst is regenerated by oxidation of coke therefrom with oxygen containing regeneration gas at elevated temperatures in a fluidized catalyst dense phase oxidation zone and a dilute phase oxidation zone, both zones contained in a vertically arranged regenerator vessel. The improvement comprises: passing the spent catalyst to a catalyst discharge level within the dense phase oxidation zone, distributing about 5 vol% to 5 vol% of the regeneration gas into the dense phase oxidation zone below the catalyst discharge level thereby initiating oxidation of the coke, distributing the balance of the regeneration gas into the dense phase oxidation zone above the catalyst discharge level, thereby continuing the oxidation of the coke and removing a substantial portion thereof within the dense phase oxidation zone.
- Assignee:
- Texaco Inc., White Plains, NY (USA)
- Patent Number(s):
- A; US 4968404
- Application Number:
- PPN: US 7-354585
- OSTI ID:
- 5716893
- Country of Publication:
- United States
- Language:
- English
Similar Records
Method for controlling regenerator temperature in a fluidized catalytic cracking process
Catalytic cracking process with multiple catalyst outlets
Process for multi-stage fast fluidized bed regeneration of catalyst
Patent
·
Mon Dec 07 23:00:00 EST 1981
·
OSTI ID:5829957
Catalytic cracking process with multiple catalyst outlets
Patent
·
Mon Nov 04 23:00:00 EST 1991
·
OSTI ID:5383281
Process for multi-stage fast fluidized bed regeneration of catalyst
Patent
·
Tue Aug 18 00:00:00 EDT 1992
·
OSTI ID:6969199