Process and apparatus for upgrading FCC product with additional reactor with catalyst recycle
AssigneeUop LLC
InventorsDavid A. Lomas, Rusty M. Pittman
Life of this patent
Estimating the term…
Abstract
A process and apparatus is disclosed for contacting feed with mixed catalyst in a secondary reactor that is incorporated into an FCC reactor. The mixed catalyst used in the secondary reactor is regenerated catalyst from a regenerator that regenerates spent catalyst from an FCC reactor that is mixed with spent catalyst from either the FCC reactor or the secondary reactor. The mixing of spent and regenerated catalyst reduces the catalyst temperature and tempers catalyst activity to inhibit both thermal and catalytic cracking reactions.
Claims20
A process for cracking and further treating hydrocarbons, said process comprising:
- contacting a first hydrocarbon feed stream with regenerated catalyst to yield cracked hydrocarbons and spent catalyst;
- separating said spent catalyst from said cracked hydrocarbons in a first separator vessel;
- regenerating at least a portion of said spent catalyst to provide regenerated catalyst;
- mixing regenerated catalyst and spent mixed catalyst to provide mixed catalyst;
- contacting a second hydrocarbon feed stream with said mixed catalyst to yield upgraded hydrocarbons and spent mixed catalyst;
- and
- separating said upgraded hydrocarbons from said spent mixed catalyst in a second separator vessel.
A process for cracking and further treating hydrocarbons comprising:
- contacting a first hydrocarbon stream with catalyst to yield cracked hydrocarbons and spent catalyst in a first reactor vessel;
- separating said spent catalyst from said cracked hydrocarbons in a first separator vessel;
- mixing regenerated catalyst with recycled spent catalyst to provide mixed catalyst;
- contacting a second hydrocarbon stream with said mixed catalyst in a second reactor vessel to yield upgraded hydrocarbons and spent mixed catalyst,
- separating said spent mixed catalyst from said upgraded hydrocarbons in a second separator vessel;
- recycling at least a portion of said spent mixed catalyst as recycled spent catalyst.
A process for cracking and further treating hydrocarbons comprising:
- contacting a first hydrocarbon stream with catalyst to yield cracked hydrocarbons and spent catalyst in a first reactor vessel;
- separating said spent catalyst from said cracked hydrocarbons in a first separator vessel;
- contacting a second hydrocarbon stream with recycled catalyst in a second reactor vessel to yield upgraded hydrocarbons and spent recycled catalyst,
- separating said spent recycled catalyst from said upgraded hydrocarbons in a second separator vessel;
- recycling at least a portion of said spent recycled catalyst as recycled catalyst to said second reactor vessel.
Dependencies are inferred from the claim text.