Catalyst for use in catalytic oxidation or ammoxidation of propane or isobutane in the gaseous phase
First Claim
1. An oxide catalyst for use in catalytic oxidation or ammoxidation of propane or isobutane in the gaseous phase, which comprises an oxide represented by the following formula (I):
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Mo1VaNbbXcYdZeQfOn
(I)wherein;
X is at least one element selected from the group consisting of tellurium and antimony;
Y is at least one element selected from the group consisting of aluminum and tungsten;
Z is at least one element selected from the group consisting of elements which individually form an oxide having a rutile structure and which are titanium, tin, germanium, lead, tantalum, ruthenium, rhenium, rhodium, iridium, platinum, molybdenum, vanadium, niobium, tellurium, antimony, aluminums and tungsten;
Q is at least one element selected from the group consisting of titanium, tin, germanium, lead, tantalum, ruthenium, rhenium, rhodium, iridium, platinum, chromium, manganese, technetium, osmium, iron, arsenic, cerium, cobalt, magnesium, nickel and zinc; and
a, b, c, d, e, f and n are, respectively, the atomic ratios of vanadium (V), niobium (Nb), X, Y, Z, Q and oxygen (O), relative to molybdenum (Mo),wherein;
0.1≦
a≦
1.0,0.01≦
b≦
1.0,0.01≦
c≦
1.0,0≦
d≦
5,0≦
e≦
3,0≦
f≦
9,with the proviso that 0<
d+e≦
3.5, andn is a number determined by and consistent with the valence requirements of theother elements present in the oxide of formula (I);
said oxide catalyst being produced by calcining a dried catalyst precursor, said precursor comprising;
(i) a molybdenum (Mo) compound which does not have a rutile structure;
(ii) a vanadium (V) compound which does not have a rutile structure;
(iii) a niobium (Nb) compound which does not have a rutile structure;
(iv) at least one X compound selected from the group consisting of compounds of elements defined as X in formula (I), wherein said X compound does not have a rutile structure;
(v) at least one compound selected from the group consisting of the following compounds (v-1) and (v-2);
(v-1) at least one Y compound selected from the group consisting of compounds of elements defined as Y in formula (I), wherein said Y compound does not have a rutile structure, and(v-2) at least one Z oxide selected from the group consisting of oxides of elements defined as Z in formula (I), wherein said Z oxide has a rutile structure; and
optionally(vi) at least one Q compound selected from the group consisting of compounds of elements defined as Q in formula (I), wherein said Q compound does not have a rutile structure,wherein said Mo compound, said V compound, said Nb compound, said X compound, said Y compound, said Z oxide and said Q compound are, respectively, used in amounts such that the atomic ratios of the Mo, V, Nb, X, Y, Z and Q in the catalyst obtained satisfy the atomic ratio requirements defined for formula (I).
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Accused Products
Abstract
Disclosed is an oxide catalyst comprising an oxide represented by the formula Mo1VaNbbXcYdZeQfOn (wherein: X is at least one element selected from the group consisting of Te and Sb; Y is at least one element selected from the group consisting of Al and W; Z is at least one element selected from the group consisting of elements which individually form an oxide having a rutile structure and a Z oxide having a rutile structure is used as a source of Z for producing the catalyst; Q is at least one element selected from the group consisting of titanium, tin, germanium, lead, tantalum, ruthenium, rhenium, rhodium, iridium, platinum, chromium, manganese, technetium, osmium, iron, arsenic, cerium, cobalt, magnesium, nickel and zinc, and a Q compound not having a rutile structure is used as a source of Q for producing the catalyst; and a, b, c, d, e, f and n are, respectively, the atomic ratios of V, Nb, X, Y, Z, Q and O, relative to Mo). Also disclosed is a process for producing an unsaturated carboxylic acid or an unsaturated nitrile by using the above-mentioned oxide catalyst.
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Citations
12 Claims
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1. An oxide catalyst for use in catalytic oxidation or ammoxidation of propane or isobutane in the gaseous phase, which comprises an oxide represented by the following formula (I):
-
Mo1VaNbbXcYdZeQfOn
(I)wherein; X is at least one element selected from the group consisting of tellurium and antimony; Y is at least one element selected from the group consisting of aluminum and tungsten; Z is at least one element selected from the group consisting of elements which individually form an oxide having a rutile structure and which are titanium, tin, germanium, lead, tantalum, ruthenium, rhenium, rhodium, iridium, platinum, molybdenum, vanadium, niobium, tellurium, antimony, aluminums and tungsten; Q is at least one element selected from the group consisting of titanium, tin, germanium, lead, tantalum, ruthenium, rhenium, rhodium, iridium, platinum, chromium, manganese, technetium, osmium, iron, arsenic, cerium, cobalt, magnesium, nickel and zinc; and a, b, c, d, e, f and n are, respectively, the atomic ratios of vanadium (V), niobium (Nb), X, Y, Z, Q and oxygen (O), relative to molybdenum (Mo), wherein; 0.1≦
a≦
1.0,0.01≦
b≦
1.0,0.01≦
c≦
1.0,0≦
d≦
5,0≦
e≦
3,0≦
f≦
9,with the proviso that 0<
d+e≦
3.5, andn is a number determined by and consistent with the valence requirements of the other elements present in the oxide of formula (I); said oxide catalyst being produced by calcining a dried catalyst precursor, said precursor comprising; (i) a molybdenum (Mo) compound which does not have a rutile structure; (ii) a vanadium (V) compound which does not have a rutile structure; (iii) a niobium (Nb) compound which does not have a rutile structure; (iv) at least one X compound selected from the group consisting of compounds of elements defined as X in formula (I), wherein said X compound does not have a rutile structure; (v) at least one compound selected from the group consisting of the following compounds (v-1) and (v-2); (v-1) at least one Y compound selected from the group consisting of compounds of elements defined as Y in formula (I), wherein said Y compound does not have a rutile structure, and (v-2) at least one Z oxide selected from the group consisting of oxides of elements defined as Z in formula (I), wherein said Z oxide has a rutile structure; and
optionally(vi) at least one Q compound selected from the group consisting of compounds of elements defined as Q in formula (I), wherein said Q compound does not have a rutile structure, wherein said Mo compound, said V compound, said Nb compound, said X compound, said Y compound, said Z oxide and said Q compound are, respectively, used in amounts such that the atomic ratios of the Mo, V, Nb, X, Y, Z and Q in the catalyst obtained satisfy the atomic ratio requirements defined for formula (I). - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A process for producing acrylonitrile or methacrylonitrile, which comprises reacting propane or isobutane with ammonia and molecular oxygen in a gaseous phase in the presence of an oxide catalyst which comprises an oxide represented by the following formula (I):
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Mo1YaNbbXcYdZeQfOn
(I)wherein; X is at least one element selected from the group consisting of tellurium and antimony; Y is at least one element selected from the group consisting of aluminum and tungsten; Z is at least one element selected from the group consisting of elements which individually form an oxide having a rutile structure and which are titanium, tin, germanium, lead, tantalum, ruthenium, rhenium, rhodium, iridium, platinum, molybdenum, vanadium, niobium, tellurium, antimony, aluminum and tungsten; Q is at least one element selected from the group consisting of titanium, tin, germanium, lead, tantalum, ruthenium, rhenium, rhodium, iridium, platinum, chromium, manganese, technetium, osmium, iron, arsenic, cerium, cobalt, magnesium, nickel and zinc; and a, b, c, d, e, f and n are, respectively, the atomic ratios of vanadium (V), niobium (Nb), X, Y, Z, Q and oxygen (O), relative to molybdenum (Mo), wherein; 0.1≦
a≦
1.0,0.01≦
b≦
1.0,0.01≦
c≦
1.0,0≦
d≦
0.5,0≦
e≦
3,0≦
f≦
9,with the proviso that 0<
d+e≦
3.5, andn is a number determined by and consistent with the valence requirements of the other elements present in the oxide of formula (I); said oxide catalyst being produced by calcining a dried catalyst precursor, said precursor comprising; (i) a molybdenum (Mo) compound which does not have a rutile structure; (ii) a vanadium (V) compound which does not have a rutile structure; (iii) a niobium (Nb) compound which does not have a rutile structure; (iv) at least one X compound selected from the group consisting of compounds of elements defined as X in formula (I), wherein said X compound does not have a rutile structure; (v) at least one compound selected from the group consisting of the following compounds (v-1) and (v-2); (v-1) at least one Y compound selected from the group consisting of compounds of elements defined as Y in formula (I), wherein said Y compound does not have a rutile structure, and (v-2) at least one Z oxide selected from the group consisting of oxides of elements defined as Z in formula (I), wherein said Z oxide has a rutile structure; and
optionally(vi) at least one Q compound selected from the group consisting of compounds of elements defined as Q in formula (I), wherein said Q compound does not have a rutile structure, wherein said Mo compound, said V compound, said Nb compound, said X compound, said Y compound, said Z oxide and said Q compound are, respectively, used in amounts such that the atomic ratios of the Mo, V, Nb, X, Y, Z and Q in the catalyst obtained satisfy the atomic ratio requirements defined for formula (I).
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Specification