Catalyst and process for the dehydrogenation of alkanes to olefins
AssigneeDow Global Technologies LLC
InventorsGlenn Pollefeyt, Miguel Rivera, Mark H. McAdon, Alexey Kirilin, Adam Chojecki, Kevin Blann, Andrzej Malek
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Abstract
An oxidative dehydrogenation catalyst having: a structure having a formula MouVvNbwSbyBizOx, where u is 1, v is from 0.1 to 0.5, w is from 0.001 to 0.3, y is from 0.001 to 0.2, z is from 0.03 to 0.2, and x is the oxygen content required to charge-balance the structure. The oxidative dehydrogenation catalyst comprises a crystalline structure (Pba2-32 space group) characterized by reflections determined with Cu—Kα X-ray diffraction (XRD) as in Table (1).
Claims15
An oxidative dehydrogenation catalyst comprising:
- (i) a structure comprising a mixed oxide of molybdenum (Mo), vanadium (V), niobium (Nb), antimony (Sb) and bismuth (Bi) having a formula MouVvNbwSbyBizOx, wherein
- u is 1, v is from 0.1 to 0.5, w is from 0.001 to 0.3, y is from 0.001 to 0.2, z is from 0.03 to 0.2, and x is an oxygen content required to charge-balance the structure;
- and
- (ii) a crystallographic structure with the Pba2-32 space group, characterized by reflections determined with Cu—Kα X-ray diffraction (XRD) as follows:
- 2θ (±0.3°)
- Rel. Intensity (%)
- 5.3
- 0.2-10
- 6.6
- 1.5-15
- 7.84
- 2.5-45
- 8.95
- 4-21
- 22.17
- 100
- 27.2
- 20-70
A method for forming an oxidative dehydrogenation catalyst, the method comprising:
- adding a molybdenum-containing compound, a vanadium-containing compound, a bismuth-containing compound, a niobium-containing compound, an antimony-containing compound, and one or more organic acids to a mixture of alkylene glycol or alcohol amine and water to form a starting mixture;
- treating the starting mixture by hydrothermal synthesis at a hydrothermal synthesis temperature that is from 150° C. to 250° C.;
- and
- separating MouVvNbwSbyBizOx from retained liquids,
- wherein the starting mixture comprises at least one of molybdenum trioxide (MoO3) and vanadium pentoxide (V2O5).
Dependencies are inferred from the claim text.