Process for mixing regenerated and carbonized catalyst
AssigneeUop LLC
InventorsKeith A. Couch, Kelly D. Seibert, Robert L. Mehlberg, Daniel R. Johnson
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Abstract
A process for mixing regenerated and carbonized catalyst involves obstructing upward flow of catalyst by one or more baffles between a catalyst inlet and a feed distributor. Each catalyst stream may be passed to opposite sides of a riser. Baffles obstruct upward flow to effect mixing of regenerated and carbonized catalyst to obtain a more uniform temperature and catalyst mixture before contacting the feed.
Claims17
A process for contacting regenerated catalyst with a hydrocarbon feed, said process comprising:
- urging said regenerated catalyst upwardly in a reactor riser with fluidizing gas;
- contacting said hydrocarbon feed with said regenerated catalyst in said reactor riser to crack said hydrocarbon feed to produce lighter gaseous hydrocarbons and deposit coke on the catalyst to produce carbonized catalyst;
- separating said gaseous hydrocarbons from said carbonized catalyst;
- contacting at least a portion of said carbonized catalyst with oxygen to combust coke from said catalyst to produce regenerated catalyst;
- passing said regenerated catalyst to said riser in a regenerated catalyst conduit;
- and
- obstructing partially upward flow of said regenerated catalyst in said riser by a baffle in said riser below said feed distributor and proximate to an intersection between said regenerated catalyst conduit and said riser to mix said regenerated catalyst in said riser before contacting said hydrocarbon feed.
A process for mixing carbonized and regenerated catalyst for contact with a hydrocarbon feed, said process comprising:
- urging mixed catalyst upwardly in a reactor riser with fluidizing gas;
- contacting said hydrocarbon feed with said mixed catalyst in said reactor riser to crack said hydrocarbon feed to produce lighter gaseous hydrocarbons and deposit coke on the catalyst to produce carbonized catalyst;
- separating said gaseous hydrocarbons from said carbonized catalyst;
- contacting a first portion of said carbonized catalyst with oxygen to combust coke from said catalyst to produce regenerated catalyst;
- passing said regenerated catalyst to said riser;
- passing a second portion of said carbonized catalyst to said riser;
- and
- obstructing partially upward flow of one of said regenerated catalyst and said carbonized in said riser by a baffle in said riser below said feed distributor and proximate to a regenerated catalyst conduit intersection or a carbonized catalyst conduit intersection to mix said regenerated catalyst and said carbonized catalyst to provide said mixed catalyst.
A process for mixing carbonized and regenerated catalyst for contact with a hydrocarbon feed, said process comprising:
- urging mixed catalyst upwardly in a reactor riser with fluidizing gas;
- contacting said hydrocarbon feed with said mixed catalyst in said reactor riser to crack said hydrocarbon feed to produce lighter gaseous hydrocarbons and deposit coke on the catalyst to produce carbonized catalyst;
- separating said gaseous hydrocarbons from said carbonized catalyst;
- contacting a first portion of said carbonized catalyst with oxygen to combust coke from said catalyst to produce regenerated catalyst;
- passing said regenerated catalyst to said riser;
- passing a second portion of said carbonized catalyst to said riser;
- and
- passing said regenerated catalyst and said carbonized catalyst to the riser at a horizontal angle of greater than about 135 degrees with respect to each other to be mixed with each other to provide said mixed catalyst.
Dependencies are inferred from the claim text.