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US 6,787,024 B2Granted
Process for reducing coke agglomeration in coking processes
AssigneeExxonMobil Research and Engineering Company
InventorsMichael Siskin, Simon R. Kelemen
Life of this patent
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Abstract
In an embodiment, the invention relates to a method for mitigating filter fouling from a coker gas oil by decomposing oligomers present in the gas oil.
Claims18
A method for reducing foulant from a coker gas oil containing molecular oxygen and peroxides, which method comprises:
- a) conducting an effluent stream from a coking process to a first separation region;
- b) separating at least a light fraction in the first separation region;
- c) conducting steam and the light fraction to a second separation region and separating a vapor fraction and a liquid hydrocarbon fraction having a peroxide concentration;
- d) conducting the liquid hydrocarbon fraction having a peroxide concentration back to the first separation region;
- e) separating in the first separation region the coker gas oil having a boiling point higher than the light fraction and containing oligomers;
- and
- (f) heating the coker gas oil to a temperature and for a time sufficient to decompose the oligomers.
4 more elements
A method for reducing foulant from a coker gas oil containing molecular oxygen and peroxides, which method comprises:
- a) conducting an effluent stream from a coking process to a first separation region;
- b) separating at least a light fraction in the first separation region;
- c) conducting steam and the light fraction to a second separation region and separating a vapor fraction and a liquid hydrocarbon fraction having a peroxide concentration;
- d) combining an oxygen scavenger to the liquid hydrocarbon fraction having a peroxide concentration while conducting the liquid hydrocarbon fraction back to the first separation region;
- e) separating in the first separation region the coker gas oil having a boiling point higher than the light fraction and containing oligomers;
- and
- f) heating the coker gas oil to a temperature and for a time sufficient to decompose the oligomers.
4 more elements
A method for reducing foulant from a coker gas oil containing molecular oxygen or peroxides, which method comprises:
- a) conducting an effluent stream from a coking process to a first separation region;
- b) separating at least a light fraction in the first separation region;
- c) separating in the first separation region the coker gas oil having a boiling point higher than the light fraction and containing oligomers;
- and
- d) heating the coker gas oil to a temperature and for a time sufficient to decompose the oligomers.
2 more elements
Dependencies are inferred from the claim text.