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US 8,785,675 B2Granted
Mixed catalyst
AssigneeAsahi Kasei Chemicals Corporation
InventorsTakaaki Kato, Minoru Kadowaki
Life of this patent
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Abstract
It is an object of the present invention to provide a mixed catalyst for a vapor-phase catalytic oxidation or a vapor-phase catalytic ammoxidation reaction of propane, or isobutene, capable of providing a corresponding unsaturated acid or unsaturated nitrile at high yield from propane or isobutene.
Claims5
A mixed catalyst for a vapor-phase catalytic oxidation reaction or a vapor-phase catalytic ammoxidation reaction of propane or isobutane,
- the mixed catalyst comprising:
- (a) a composite oxide represented by the following composition formula (1):
- Mo1VaNbbSbcWdZeOn (1)
- wherein Z represents at least one element selected from the group consisting of La, Ce, Pr, Yb, Y, Sc, Sr, and Ba;
- each of a, b, c, d, e, and n represents an atomic ratio of each element based on Mo atom;
- a is in a range of 0.01≦a≦1;
- b is in a range of 0.01≦b≦1;
- c is in a range of 0.01≦c≦1;
- d is in a range of 0.001≦d≦1;
- e is in a range of 0≦e≦1;
- and n represents a number determined by a valence of a component metal;
- and
- (b) a tungsten compound at a ratio of the following formula (2):
- 0.001<w<0.3 (2)
- wherein w represents an atomic ratio of tungsten in the tungsten compound as an atomic ratio based on Mo atom in the composite oxide.
12 more elements
Dependencies are inferred from the claim text.