Catalysts for oxidative dehydrogenation
AssigneeNOVA Chemicals (International) S.A.
InventorJared Taylor
Life of this patent
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Abstract
A catalyst and methods for making the catalyst are provided. An exemplary catalyst includes the formula: MoaVbBicMdOx. In this formula, M is Ta or Nb, a is 1.0, b is 0.01 to 0.5, c is 0.005 to 0.2, d is 0.005 to 0.1, and x is the number of oxygen atoms necessary to render the catalyst electrically neutral. The values a, b, c, and d are determined based on the 5 amount of each starting material used to form the catalyst. The catalysts provided herein may be suitable as catalyst in oxidative dehydrogenation reactions, such as in the oxidative dehydrogenation of ethane.
Claims32
A catalyst comprising the formula:
- wherein:
- M is Ta or Nb, or a mixture thereof,
- a is 1.0;
- b is 0.01 to 0.5;
- c is 0.005 to 0.2;
- d is 0.005 to 0.1;
- and
- x is the number of oxygen atoms necessary to render the catalyst electrically neutral;
- wherein a, b, c, and d are determined based on the amount of each starting material used to form the catalyst.
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A method for preparing a catalyst comprising:
- forming a slurry comprising metal oxides, a bismuth compound, a reducing agent, and water;
- and
- heating the slurry to form the catalyst;
- wherein the metal oxides comprise:
- an oxide of molybdenum;
- an oxide of vanadium;
- and
- an oxide of tantalum or an oxide of niobium, or both;
- and
- wherein the bismuth compound comprises bismuth oxide, bismuth hydroxide, or a bismuth carbonate.
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A process for oxidative dehydrogenation of ethane, the process comprising contacting a gaseous feed comprising ethane and oxygen with a catalyst in a reactor to produce an effluent comprising ethylene, wherein the catalyst has the formula:
- wherein:
- M is Ta or Nb, or a mixture thereof,
- a is 1.0;
- b is 0.01 to 0.5;
- c is 0.005 to 0.2;
- d is 0.005 to 0.1;
- and
- x is the number of oxygen atoms necessary to render the catalyst electrically neutral;
- wherein a, b, c, and d are determined based on the amount of each starting material used to form the catalyst.
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Dependencies are inferred from the claim text.