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US 2001/0040118 A1Published application
FCC process
OwnerEduardo Mon, George A. Swan III +2inventors
InventorsEduardo Mon, George A. Swan III, Rustom M. Billimoria, Paul K. Ladwig
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Abstract
The present invention is a fluidized catalytic cracking process that incorporates a zoned riser reactor. The process provides an in-situ method for feed upgrading in a riser reactor. The process assists in the removal of undesirable contaminants, such as nitrogen, from FCC feedstocks.
Claims24
A process comprising:
- (a) passing a vacuum resid having boiling range greater than about 565° C. (about 1050° F.) to a resid processing unit;
- (b) separating a light resid fraction having boiling range between about 565° C. and about 650° C. (about 1200° F.) from the vacuum resid;
- (c) combining the light resid fraction with a FCC feed;
- (d) passing the combined FCC feed to a FCC unit configured to have a plurality of reaction zones;
- (e) in the FCC unit:
- (i) contacting a first portion of catalyst with a secondary feed in a first upstream zone, the secondary feed having a boiling range between about 25° C. and about 250° C.;
- (ii) in a first primary feed conversion zone, contacting the combined feed comprising nitrogen contaminants with the first portion of catalyst passed from the first upstream zone, wherein the temperature in the first primary feed conversion zone is greater than about 450° C., thereby vaporizing a substantial portion of the combined feed;
- (iii) passing the effluent from the first primary feed conversion zone to a secondary primary feed conversion zone and contacting the effluent from the first primary feed conversion zone with a second portion of catalyst under catalytic cracking conditions.
5 more elements
A process comprising:
- (a) passing a atmospheric pipe still bottoms stream to a vacuum pipe still;
- (b) separating a vacuum gas oil having a boiling range between about 340° C. and about 565° C. from the bottoms stream, the remainder comprising a vacuum resid fraction;
- (c) passing at least a portion of the vacuum resid fraction to a short-path distillation unit;
- (d) in the short-path distillation unit, separating a lighter resid fraction having a boiling range between about 565° C. and about 650° C. (about 1200° F.);
- (e) combining the lighter resid fraction with the vacuum gas oil to form a FCC feed;
- (f) passing the FCC feed to a FCC unit configured to have a plurality of reaction zones;
- (g) in the FCC unit:
- (i) contacting a first portion of catalyst with a secondary feed in a first upstream zone, the secondary feed having a boiling range between about 25° C. and about 250° C.;
- (ii) in a first primary feed conversion zone, contacting the FCC feed comprising nitrogen contaminants with the first portion of catalyst passed from the first upstream zone, wherein the temperature in the first primary feed conversion zone is greater than about 450° C., thereby vaporizing a substantial portion of the FCC feed;
- (iii) passing the effluent from the first primary feed conversion zone to a secondary primary feed conversion zone and contacting the effluent from the first primary feed conversion zone with a second portion of catalyst under catalytic cracking conditions.
7 more elements
Dependencies are inferred from the claim text.