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AssigneeUop LLC
InventorsSteven A. Bradley, Robert B. James, JR., David W. Alley
Estimating the term…
A coating applied to at least a portion of the surfaces of reactors, reactor internals, other reactor components, and/or heater tubes is provided in order to minimize the formation of metal catalyzed coke in hydrocarbon conversion processes operating at temperatures at about 350° C. (662° F.) or greater and in reducing environments. These coatings may comprise Nickel coatings or complexes thereof, such as Ni—Al, Ni—Cr/Cr carbide, as well as aluminum painted coatings that are applied in a reduction cure process (e.g., application temperatures of about 600° C. (1112° F.)). Additionally, where H2S is necessary for the process, such as to minimize thermal cracking, the coatings also reduce corrosion of base metal due to sulfidation attack and eliminate the requirement of continuous replacement of reactor internals and other components.
A coating for metal alloy surfaces comprising complexes of nickel and aluminum, complexes of nickel, chromium and chromium carbide, sintered aluminum, or sintered aluminum applied over complexes of nickel and aluminum, the coating metallurgically bonded to the metal alloy surfaces and providing an exposed surface resistant to metal catalyzed coke formation in the presence of a hydrocarbon feed stream under reducing conditions.
A system for converting a hydrocarbon feed stream under reducing conditions, the system including metal alloy components with surfaces of the metal alloy components exposed to the hydrocarbon feed stream having a coating applied thereto, the coating comprising a complex of nickel and aluminum, a complex of nickel, chromium and chromium carbide, sintered aluminum, or sintered aluminum applied over a complex of nickel and aluminum, the coating metallurgically bonded with the metal alloy surfaces providing an exposed surface resistant to metal catalyzed coke formation in the presence of the hydrocarbon feed stream under reducing conditions.
A method for the reduction of metal catalyzed coke formation on metal alloy component surfaces exposed to a hydrocarbon feed stream under reducing conditions comprising:
Dependencies are inferred from the claim text.