Process and apparatus for upgrading FCC product with additional reactor with thorough mixing
AssigneeUop LLC
InventorDavid A. Lomas
Life of this patent
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Abstract
A process and apparatus are disclosed contacting hydrocarbon feed with catalyst in a reactor vessel under conditions more vigorous than bubbling bed conditions and preferably fast fluidized flow conditions. The vigorous conditions assure thorough mixing of catalyst and feed to suppress formation of dry gas and the promotion of hydrogen transfer reactions.
Claims19
A process for cracking and further treating hydrocarbons, said process comprising:
- contacting a first hydrocarbon feed stream with catalyst to yield cracked hydrocarbons and spent catalyst;
- separating said spent catalyst from said cracked hydrocarbons in a separator section;
- regenerating at least a portion of said spent catalyst to provide regenerated catalyst;
- and
- contacting a second hydrocarbon feed stream with regenerated catalyst in a reaction zone under fluidized flow conditions including a superficial vapor velocity of greater than or equal to 0.6 m/s (1.8 ft/s) and a slip ratio of greater than or equal to 2.5 to yield upgraded hydrocarbons and spent catalyst.
A process for treating a hydrocarbon stream including at least a portion of effluent from an FCC reactor, said process comprising:
- contacting said hydrocarbon stream with catalyst in a reaction zone under fluidized flow conditions that promote homogeneous mixing of catalyst and hydrocarbons, a superficial vapor velocity of greater than or equal to 0.6 m/s (1.8 ft/s) and a slip ratio of greater than or equal to 3.0 to yield an upgraded hydrocarbon stream and spent catalyst.
A process for cracking and further treating hydrocarbons, said process comprising:
- contacting a first hydrocarbons, feed stream with catalyst to yield cracked hydrocarbons and spent catalyst;
- separating said spent catalyst from said cracked hydrocarbons in a separator section;
- regenerating at least a portion of said spent catalyst to provide regenerated catalyst;
- contacting a second hydrocarbon feed stream with regenerated catalyst in a reaction zone under fluidized flow conditions including a superficial vapor velocity of greater than or equal to 0.6 m/s (1.8 ft/s) and a slip ratio of greater than or equal to 2.5 to yield upgraded hydrocarbons and spent catalyst;
- separating said upgraded hydrocarbons from said spent catalyst;
- and
- recycling at least a portion of said spent catalyst to said reaction zone.
Dependencies are inferred from the claim text.