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US 12,691,438 B2Granted
Catalyst
AssigneeMitsubishi Chemical Corporation
InventorsKensuke Nishiki, Takuro Watanabe, Tetsufumi Yamaguchi
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Abstract
An object of the present invention is to provide a catalyst capable of improving the selectivity of unsaturated aldehydes and unsaturated carboxylic acids, and a catalyst containing molybdenum, antimony, bismuth, and iron, wherein an atom ratio of the antimony to the molybdenum on a surface of the catalyst is greater than an atom ratio of the antimony to the molybdenum in the entire catalyst is provided.
Claims15
A catalyst comprising molybdenum, antimony, bismuth and iron,
- wherein an atom ratio of the antimony to the molybdenum on a surface of the catalyst is greater than an atom ratio of the antimony to the molybdenum in an entire catalyst,
- a ratio B/A is 1.2 to 10.0, in which A is an atom ratio of the antimony to the molybdenum calculated by Inductively Coupled Plasma (ICP) emission spectroscopy, and B is a peak area ratio of the antimony to the molybdenum calculated by X-ray photoelectron spectroscopy, and
- the catalyst comprises Formula (1):
- MoaBibFecSbdMeXfYgSihOi (1)
- wherein, in Formula (1),
- Mo, Bi, Fe, Sb, Si and O represent molybdenum, bismuth, iron, antimony, silicon and oxygen, respectively,
- M represents at least one selected from the group consisting of cobalt and nickel,
- X represents at least one element selected from the group consisting of zinc, chromium, lead, manganese, calcium, magnesium, niobium, silver, barium, tin, thallium, tungsten, phosphorus, boron, sulfur, selenium, tellurium, cerium and titanium,
- Y represents at least one element selected from the group consisting of cesium, lithium, sodium, potassium, rubidium and thallium,
- a, b, c, d, e, f, g, h and i represent an atomic ratio,
- a=12, b=0.01 to 3.00, c=0.01 to 5.00, d=0.01 to 5.00, e=0.00 to 12.00, f=0.00 to 8.00, g=0.001 to 2.00, h=0.00 to 20.00, and
- i represents an oxygen atom ratio required to satisfy a valence of each component.
9 more elements
A method of producing a catalyst containing molybdenum and antimony, comprising:
- mixing a molybdenum compound, an antimony compound, and a dispersant to produce a mixture;
- and
- calcinating the mixture to produce the catalyst;
- wherein, in the mixing, the dispersant is added before the antimony compound is dissolved,
- an atom ratio of the antimony to the molybdenum on a surface of the catalyst is greater than an atom ratio of the antimony to the molybdenum in an entire catalyst
- a ratio B/A is 1.2 to 10.0, in which A is an atom ratio of the antimony to the molybdenum calculated by Inductively Coupled Plasma (ICP) emission spectroscopy, and B is a peak area ratio of the antimony to the molybdenum calculated by X-ray photoelectron spectroscopy, and
- the catalyst comprises Formula (1):
- MoaBibFecSbdMeXfYgSihOi (1)
- wherein, in Formula (1),
- Mo, Bi, Fe, Sb, Si and O represent molybdenum, bismuth, iron, antimony, silicon and oxygen, respectively,
- M represents at least one selected from the group consisting of cobalt and nickel,
- X represents at least one element selected from the group consisting of zinc, chromium, lead, manganese, calcium, magnesium, niobium, silver, barium, tin, thallium, tungsten, phosphorus, boron, sulfur, selenium, tellurium, cerium and titanium,
- Y represents at least one element selected from the group consisting of cesium, lithium, sodium, potassium, rubidium and thallium,
- a, b, c, d, e, f, g, h and i represent an atomic ratio,
- a=12, b=0.01 to 3.00, c=0.01 to 5.00, d=0.01 to 5.00, e=0.00 to 12.00, f=0.00 to 8.00, g=0.001 to 2.00, h=0.00 to 20.00, and
- i represents an oxygen atom ratio required to satisfy a valence of each component.
13 more elements
Dependencies are inferred from the claim text.