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US 8,137,535 B2Granted
Method for adjusting catalyst activity
AssigneeKellogg Brown & Root LLC
InventorPritham Ramamurthy
Life of this patent
Estimating the term…
Abstract
Systems and methods for producing and using one or more doped catalysts are provided. One or more coked-catalyst particles can be fluidized in the presence of one or more oxidants to provide a fluidized mixture. The coke from the one or more coked-catalyst particles can be removed to provide regenerated catalyst particles within the fluidized mixture. One or more doping agents can be distributed to the fluidized mixture, and the one or more doping agents can be deposited onto the surface of the regenerated catalyst particles to provide a regenerated, doped catalyst particle.
Claims29
A method for doping hydrocarbon cracking catalyst, comprising:
- fluidizing one or more coked-catalyst particles in the presence of one or more oxidants to provide a fluidized mixture;
- removing at least a portion of the coke from the one or more coked-catalyst particles to provide regenerated catalyst particles within the fluidized mixture;
- distributing one or more doping agents to the fluidized mixture;
- depositing the one or more doping agents onto a surface of the regenerated catalyst particles to provide one or more doped catalyst particles;
- and
- cracking a hydrocarbon feed in the presence of the one or more doped catalyst particles to provide a hydrocarbon product, wherein;
- the hydrocarbon product comprises ethylene, propylene, and aromatic hydrocarbons,
- an amount of at least one of ethylene and propylene in the hydrocarbon product is at least 5 wt % based on a weight of the hydrocarbon feed, and
- cracking the hydrocarbon feed cokes the one or more doped catalyst particles to provide the one or more coked-catalyst particles for the fluidized mixture;
- wherein the one or more doping agents comprise gallium and at least one of magnesium, barium, ruthenium, rhodium, and palladium.
7 more elements
A method for catalytically cracking one or more hydrocarbons, comprising:
- fluidizing a hydrocarbon in the presence of one or more doped catalyst particles to provide a fluidized reaction mixture;
- selectively cracking the hydrocarbon to provide one or more gaseous hydrocarbons, one or more hydrocarbon by-products, and coked-catalyst particles;
- selectively separating the one or more gaseous hydrocarbons from the coked-catalyst particles to provide a hydrocarbon product comprising ethylene, propylene, and aromatic hydrocarbons, wherein an amount of at least one of ethylene and propylene in the hydrocarbon product is at least 5 wt % based on a weight of the hydrocarbon feed;
- fluidizing the coked-catalyst particles with one or more oxidants;
- removing coke from the coked-catalyst particles to provide fluidized regenerated catalyst particles;
- introducing one or more doping agents to the fluidized regenerated catalyst particles to provide the one or more doped catalyst particles;
- and
- returning the one or more doped catalyst particles to the fluidized reaction mixture;
- wherein the one or more doping agents comprise gallium and at least one of magnesium, barium, ruthenium, rhodium, and palladium.
6 more elements
A method for catalytically cracking one or more hydrocarbons, comprising:
- fluidizing a hydrocarbon in the presence of one or more doped catalyst particles to provide a fluidized reaction mixture;
- selectively cracking the hydrocarbon in the presence of the one or more doped catalyst particles to provide one or more gaseous hydrocarbons, one or more hydrocarbon by-products, and coked-catalyst particles;
- selectively separating the one or more gaseous hydrocarbons from the coked-catalyst particles to provide a hydrocarbon product comprising ethylene, propylene, and aromatic hydrocarbons, and wherein an amount of at least one of ethylene and propylene in the hydrocarbon product is at least 5 wt % based on a weight of the hydrocarbon feed;
- fluidizing the coked-catalyst particles;
- removing coke from the coked-catalyst particles to provide regenerated catalyst particles;
- selecting one or more doping agents based at least in part on a composition of the hydrocarbon feed;
- introducing the one or more selected doping agents to the regenerated catalyst particles to provide the one or more doped catalyst particles;
- and
- returning the one or more doped catalyst particles to the fluidized reaction mixture;
- wherein the one or more doping agents comprise gallium and at least one of magnesium barium, ruthenium, rhodium and palladium.
7 more elements
Dependencies are inferred from the claim text.