TH57585A - Oxide catalysts for oxidation or amoxidation. - Google Patents

Abstract

DC60 (08/03/45) This invention reveals an oxide catalyst for use in the oxidation or amoxidation of propane or isobutane catalysts in the gas phase, which consists of the elements denoted by the formula (Mol Va Sbb Nbc ZdOn (where Z is at least one element). A choice can be made from groups consisting of tungsten, chromium, titanium, aluminum, tantalum, zirconium, hafnium, manganese, iron, ruthenium, cobalt, rhodium, nickel, palladium, platinum, zinc, boron, indium, germanium, tin, lead, bismuth, ytrium, gallium, rare earth elements, and alkali earth metals, where a, b, c, d, and n, respectively, are the atomic ratios of V, Sb, Nb, Z, and O, respectively, to O), where 0.1 is less than or equal to a < 0.4, 0.1 < b is less than or equal to 0.4, 0.01 is less than or equal to c is less than or equal to 0.3, 0.00 is less than or equal to d is less than or equal to 1, provided that a < b and n are predetermined numbers. Given the need for valences of other available elements, as well as methods for the production of unsaturated carboxylic acids or unsaturated nitrils using the aforementioned oxide catalysts, this invention reveals an oxide catalyst for use in the oxidation or amoxidation of propane or isobutane in the gas phase, which consists of the composition denoted by the formula (Mol Va Sbb Nbc ZdOn (where Z is at least one element). A choice can be made from groups consisting of tungsten, chromium, titanium, aluminum, tantalum, zirconium, hafnium, manganese, iron, ruthenium, cobalt, rhodium, nickel, palladium, platinum, zinc, boron, indium, germanium, tin, lead, bismuth, ytrium, gallium, rare earth elements, and alkali earth metals, where a, b, c, d, and n, respectively, are the atomic ratios of V, Sb, Nb, Z, and O, respectively, to O), where 0.1 (formula a < 0.4), 0.1 < b (formula 0.4), 0.01 (formula c), 0.3, 00 (formula d), and 1 (formula 1), provided that a is less than b, and n is a predetermined number, along with the required valence of the other available elements. This also includes processes for the production of unsaturated carboxylic acids or unsaturated nitrils using the oxide catalysts mentioned above.

Claims (18)

1. An oxide catalyst for use in accelerating the amoxidation or oxidation of propane or isobutane in the gas phase, which contains the following composition, given by the formula: (I) Mol Va Sbb Nbc ZdOn (I) where Z is at least one of the elements. A choice can be made from groups consisting of tungsten, chromium, titanium, aluminum, tantalum, zirconium, hafnium, manganese, iron, ruthenium, cobalt, rhodium, nickel, palladium, platinum, zinc, boron, indium, germanium, tin, lead, bismuth, ytrium, gallium, rare earth elements, and alkali earth metals a, b, c, d, and n, where each is the atomic ratio of vanadium (V), antimony (Sb), niobium (Nb), Z, and oxygen, related to where 0.1 is less than or equal to a is less than 0.4, 0.1 is less than or equal to b is less than or equal to 0.4, 0.01 is less than or equal to c is less than or equal to 0.3, 0 is less than or equal to d is less than or equal to 1, where the conditions a is less than b and n are equal to n. The number is a fixed quantity and includes the valence requirements of other existing elements. 2. Oxide catalyst as per claim 1, where a in formula (I) where appropriately has the following relationship: 0.1 less than or equal to a less than or equal to 0.3 3. An oxide catalyst in accordance with claim 1 or 2, where b in formula (I) is appropriately related as follows: 0.1 is less than b is less than or equal to 0.35. 4. An oxide catalyst that conforms to one of the claims of claims 1 through 3, where c in formula (I) appropriately has the following relationship: 0.05 less than or equal to c less than or equal to 0.2. 5. Oxide catalysts, in accordance with one of the claims 1 through 4, where formula (I) is appropriately related as follows: 0.15 less than or equal to a less than or equal to 0.28. 6. Oxide catalysts, as consistent with one of claims 1 through 5, where b in formula (I) is appropriately related as follows: 0.2 is less than or equal to b is less than or equal to 0.33. 7. Oxide catalysts, in accordance with one of the claims 1 through 6, where c in formula (I) is appropriately related as follows: 0.05 less than or equal to c less than or equal to 0.15. 8. Oxide catalysts, as consistent with one of the claims 1 through 7, where a, b, and c in formula (I) are appropriately related as follows: 0.15 less than or equal to a less than or equal to 0.28; 0.2 less than or equal to b less than or equal to 0.33; 0.05 less than or equal to c less than or equal to 0.15; 0.5 less than or equal to a + b + c less than or equal to 0.69; a greater than or equal to 0.23'; and a + b + c 0.59 - 0.528a less than or equal to b; a + b + c a + b + c less than or equal to 0.7; 0.524a a + b + c 9. An oxide catalyst that conforms to one of the claims of claims 7 to 8, where a, b, and c in formula (I) fit the following relationship: 0.16 less than or equal to a less than or equal to 0.28; 0.24 less than or equal to b less than or equal to 0.33; 0.07 less than or equal to c less than or equal to 0.15; 0.53 less than or equal to a + b + c less than or equal to 0.67; a greater than or equal to 0.26; and a + b + c 0.63 - 0.549a less than or equal to b a + b + c a + b + c less than or equal to 0.68- 0.529a a + b + c 10. Oxide catalysts, as per any of the claims 1 through 9, where a, b, and c in formula (I) are appropriately related as follows: 0.16 less than or equal to a less than or equal to 0.26; 0.24 less than or equal to b less than or equal to 0.30; 0.08 less than or equal to c less than or equal to 0.12; 0.57 less than or equal to a + b + c less than or equal to 0.60; a greater than or equal to 0.28; and a + b + c 0.67 - 0.5975a less than or equal to b a + b + c a + b + c less than or equal to 0.67 - 0.3532a a + b + c 11. An oxide catalyst conforming to one of claims 1 through 10, whose X-ray scattering pattern is shown by using alpha CuK as the X-ray source, has a peak at the scattering angle (2theta) of (chemical formula). 12. An oxide catalyst conforming to any of the claims 1 through 11, whereby additionally comprising a silica carrier supported on the oxide catalyst, whereby the silica carrier is present in an amount ranging from 20 to 60% by weight in terms of SiO2 on the basis of the total weight of the oxide catalyst and the said silica carrier in terms of SiO2. 13. An oxide catalyst in accordance with any of the claims 1 through 12, where Z in formula (I) is at least one element of choice from the group comprising tungsten, chromium, titanium, aluminum, tantalum, zirconium, iron, byron, indium, germanium and tin. 14. An oxide catalyst in accordance with any of the claims 1 through 13, whereby a method consisting of the preparation of a raw material mixture in water containing compounds of molybdenum, vanadium, antimony, niobium, and where appropriate is Z, and the drying of such raw material mixture in water followed by sintering. 15. A catalyst conforming to claim 14, where sintering is carried out at 500 to 700 °C in an inert gas atmosphere, in the absence of oxygen molecules. 16. An oxide catalyst conforming to one of the claims 14 or 15, whereby a mixture of raw materials in water is further composed of oxalic acid, whereby the molar ratio of such oxalic acid to the niobium compound in the niobium tereform is in the range of 1 to 10. 17. The process for the production of acrylonitrile or methacrylonitrile, which involves the reaction of propane or isobutane with ammonia and oxygen molecules in the gas phase, in the presence of one of the oxide catalysts of claims 1 through 16. 18. A process for the production of acrylic acid or methacrylic acid, which involves the use of propane or isobutane with oxygen molecules in the gas phase, using an oxide catalyst from one of the claims 1 through 16.