Packed bed arrangement for oxidation reaction system
AssigneePraxair Technology, Inc.
InventorsRaymond F. Drnevich, Douglas R. Dreisinger
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Abstract
The present invention relates to processes and apparatus for mixing oxidizable reactants with oxidant and oxidizing oxidizable reactants. When ammonia is used as the reactant, nitric acid can be obtained. Through using particular mixing and oxidizing arrangements, the volume of reactant oxidized can be significantly increased.
Claims16
A process for oxidizing at least one oxidizable reactant selected from the group consisting of methanol, benzene, naphthalene, orthoxylene, cumene, methane, propylene, acrolein and ammonia with oxidant, said process comprising:
- introducing said reactant and oxidant into a packed bed containing inert packing materials to form a mixture at a temperature below the auto-ignition temperature of the resulting mixture and then subjecting said resulting mixture to an oxidation reaction condition to oxidize said reactant and wherein said inert packing materials are spherically shaped particles whose maximum diameter sizes are defined by the equation:
- ##EQU3## DP=diameter of inert spherical packing material (in.) VSD=superficial velocity at design inlet conditions (ft/sec)
- VLB=laminar burning velocity of mixture (ft/sec)
- Dt=diameter of packed tube (in.).
A process for oxidizing at least one oxidizable reactant selected from the group consisting of methanol, benzene, naphthalene, orthoxylene, cumene, methane, propylene, acrolein and ammonia with oxidant, said process comprising:
- introducing a mixture containing said at least one oxidizable reactant and oxidant into at least one reactor containing oxidation catalysts in the form of a packed bed, wherein the maximum particle diameter of said oxidation catalysts is defined by the equation:
- ##EQU4## DP=diameter of spherical packing catalytic material (in.) VSD=superficial velocity at design inlet conditions (ft/sec)
- VLB=laminar burning velocity of said mixture (ft/sec)
- Dt=diameter of packed tube (in.)
- and oxidizing said reactant in the presence of said oxidant in said reactor containing said oxidation catalysts.
A process for oxidizing at least one oxidizable reactant which is susceptible to flammable or explosive reactions during oxidation, said process comprising:
- introducing said at least one oxidizable reactant and oxidant into a packed bed containing inert packing materials at a temperature below the auto-ignition temperature of the resulting mixture, wherein the maximum particle diameter of said inert packing materials are defined by the equation:
- ##EQU5## DP=diameter of inert spherical packing material (in.) VSD=superficial velocity at design inlet conditions (ft/sec)
- VLB=laminar burning velocity of said mixture (ft/sec)
- Dt=diameter of packed tube (in.)
- and then subjecting said resulting mixture to an oxidation reaction condition in the presence of oxidation catalyst particles to oxidize said at least one oxidizable reactant.
Dependencies are inferred from the claim text.