Catalysts for the oxidative dehydrogenation of alkanes
AssigneeNOVA Chemicals (International) S.A.
InventorsXiaoliang Gao, Marie Barnes, Vasily Simanzhenkov, Elena Sebastiao, David Sullivan, Yoonhee Kim
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Abstract
This document relates to oxidative dehydrogenation catalysts that include molybdenum, vanadium, and oxygen.
Claims35
An oxidative dehydrogenation catalyst comprising molybdenum, vanadium, and oxygen, wherein:
- the molar ratio of molybdenum to vanadium in the catalyst is from 1:0.15 to 1:0.75, as determined by inductively coupled plasma mass spectrometry (ICP-MS),
- oxygen is present in the catalyst at least in an amount to satisfy the valency of any present metal oxides, and
- the amorphous phase of the catalyst is from 55 wt. % to 80 wt. %, as determined by X-ray diffraction (XRD).
An oxidative dehydrogenation catalyst comprising molybdenum, vanadium, and oxygen, wherein:
- the molar ratio of molybdenum to vanadium in the catalyst is from 1:0.20 to 1:0.60, as determined by ICP-MS,
- oxygen is present in the catalyst at least in amount to satisfy the valency of any present metal oxides, and
- the amorphous phase of the catalyst is greater than 55 wt. %, as determined by XRD.
An oxidative dehydrogenation catalyst comprising molybdenum, vanadium, and oxygen, wherein:
- the molar ratio of molybdenum to vanadium in the catalyst is from 1:0.20 to 1:0.50, as determined by ICP-MS,
- oxygen is present in the catalyst at least in amount to satisfy the valency of any present metal oxides, and
- the amorphous phase of the catalyst is greater than 55 wt. %, as determined by XRD.
An oxidative dehydrogenation catalyst comprising molybdenum, vanadium, and oxygen, wherein:
- the molar ratio of molybdenum to vanadium in the catalyst is from 1:0.35 to 1:0.65, as determined by ICP-MS,
- oxygen is present in the catalyst at least in amount to satisfy the valency of any present metal oxides, and
- the amorphous phase of the catalyst is greater than 55 wt. %, as determined by XRD.
An oxidative dehydrogenation catalyst comprising molybdenum, vanadium, and oxygen, wherein:
- the molar ratio of molybdenum to vanadium in the catalyst is from 1:0.30 to 1:0.50, as determined by ICP-MS,
- oxygen is present in the catalyst at least in amount to satisfy the valency of any present metal oxides, and
- the amorphous phase of the catalyst is greater than 45 wt. %, as determined by XRD;
- and
- wherein the catalyst is prepared by a method comprising:
- providing an aqueous mixture comprising molybdenum and vanadium,
- hydrothermally reacting the mixture to form a precalcined catalyst,
- calcining the precalcined catalyst under a nitrogen atmosphere to form the catalyst, and
- washing the catalyst with an acid solution.
Dependencies are inferred from the claim text.