Ammonia oxidation reactor with internal filter element
AssigneeBASF SE
InventorRobert A. Fox
Life of this patent
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Abstract
A reaction vessel for oxidation of ammonia to nitrogen monoxide in the presence of a catalyst is provided. The catalyst can become dislodged during the oxidation. The reaction vessel includes a reactor body having a top portion, a bottom portion, and a middle portion. The top and middle portions cooperate to define a cavity where the ammonia is catalytically oxidized to provide the nitrogen monoxide. The reaction vessel also includes an internal filter element. The internal filter element includes a filter cage that defines an interior volume and a filter medium disposed adjacent to the filter cage. The internal filter element collects the catalyst dislodged during the oxidation.
Claims13
A reaction vessel for oxidation of ammonia to nitrogen monoxide in the presence of a catalyst which can become dislodged during the oxidation, said reaction vessel comprising:
- a reactor body having a top portion, a bottom portion, and a middle portion,
- wherein said top and middle portions cooperate to define a cavity where the ammonia is catalytically oxidized to provide the nitrogen monoxide;
- a filter plate extending across said reactor body dividing said bottom portion from said cavity;
- and
- an internal filter element provided on said filter plate,
- wherein said internal filter element comprises a filter cage defining an interior volume and a filter medium disposed adjacent to said filter cage and protruding upwardly from said filter plate into said cavity, and
- wherein said internal filter element collects said catalyst dislodged during the oxidation.
A reaction vessel for oxidation of ammonia to nitrogen monoxide in the presence of a catalyst which can become dislodged during the oxidation, said reaction vessel comprising:
- a reactor body having a top portion, a bottom portion, and a middle portion,
- wherein said top and middle portions cooperate to define a cavity where the ammonia is catalytically oxidized to provide the nitrogen monoxide;
- an internal filter element disposed within said cavity and comprising a filter medium comprising ceramic,
- wherein said internal filter element collects the catalyst dislodged during the oxidation;
- a filter plate extending across said reactor body dividing said bottom portion from said cavity,
- wherein said internal filter element is provided on said filter plate and comprises a filter cage,
- wherein said filter medium is disposed adjacent to said filter cage, and
- wherein said filter cage defines an interior volume and protrudes upwardly from said filter plate into said cavity.
A method of oxidizing ammonia to nitrogen monoxide in the presence of a catalyst which can become dislodged during the oxidation, said method comprising:
- providing a reaction vessel comprising a reactor body,
- wherein the reactor body comprises a top portion, a bottom portion, and a middle portion, and
- wherein the top and middle portions cooperate to define a cavity;
- providing an internal filter element within the cavity;
- oxidizing ammonia in the presence of a catalyst in the cavity to form nitrogen monoxide;
- internally filtering the catalyst dislodged during the step of oxidizing ammonia with the internal filter element;
- and
- collecting the dislodged catalyst from the internal filter element;
- disconnecting the bottom portion of the reactor body from the middle portion of the reactor body;
- and
- lowering the bottom portion of the reactor body to a height sufficient to remove the internal filter element from the cavity,
- wherein said step of collecting the dislodged catalyst from the internal filter element is performed after said step of lowering the bottom portion of the reactor body.
Dependencies are inferred from the claim text.