Dried granules for catalyst production, catalyst, and compound production method

Abstract

A catalyst, wherein when a scanning electron microscope (SEM) with an accelerating voltage of 15 kV is used to obtain an SEM image of the catalyst at a magnification such that the maximum length of one particle in the vertical direction in the SEM image occupies 90% or more of the vertical length of the SEM image and the maximum length of one particle in the horizontal direction in the SEM image occupies 90% or more of the horizontal length of the SEM image, the concentration of bismuth (Bi) in white areas when the SEM image is binarized into black and white is larger than the value obtained by adding 2.5 times the value of the standard deviation [sigma]1 of the Bi concentration in the black areas to the Bi concentration in the black areas.

Description

technical field

[0001] The present invention relates to a novel catalyst capable of obtaining a target product with high activity and a high yield, and particularly relates to a catalyst capable of being stable even in a region where the catalyst activity is high when producing an unsaturated aldehyde, an unsaturated carboxylic acid, or a conjugated diene by oxidation. A catalyst and a method for producing the same can be produced with a high yield. Background technique

[0002] Methods for producing corresponding unsaturated aldehydes and unsaturated carboxylic acids using propylene, isobutene, t-butanol, etc. as raw materials, and gas-phase catalytic oxidation methods for producing 1,3-butadiene from butenes are widely practiced industrially. In particular, many reports have been made on methods of producing corresponding unsaturated aldehydes and unsaturated carboxylic acids using propylene, isobutylene, tert-butanol, etc. as raw materials as means to increase their yield...

Examples

manufacture example 1

[0128] 800 parts by weight of ammonium heptamolybdate tetrahydrate was completely dissolved in 3040 parts by weight of pure water heated to 60°C. Next, 5.59 parts by weight of potassium nitrate was dissolved in 55 mL of pure water, and added to the above solution. Next, 274.6 parts by weight of iron nitrate nonahydrate, 571.5 parts by weight of cobalt nitrate hexahydrate, and 307.4 parts by weight of nickel nitrate hexahydrate were dissolved in 611 mL of pure water heated to 60°C. These solutions were mixed slowly while stirring. Next, 311.4 parts by weight of bismuth nitrate was added to an aqueous solution of nitric acid obtained by adding 79.3 parts by weight of nitric acid (60% by weight) to 330 mL of pure water, and the solution obtained by completely dissolving it was added to the above solution and carried out. Stir to combine. The slurry was dried by disc spray drying, and the obtained dry powder was precalcined while maintaining the maximum temperature of 440° C. fo...

manufacture example 2

[0134] 800 parts by weight of ammonium heptamolybdate tetrahydrate was completely dissolved in 3040 parts by weight of pure water heated to 60°C. Next, 11.0 parts by weight of cesium nitrate was dissolved in 100 mL of pure water, and added to the above solution. Next, 259.3 parts by weight of iron nitrate nonahydrate, 791.3 parts by weight of cobalt nitrate hexahydrate, and 109.8 parts by weight of nickel nitrate hexahydrate were dissolved in 615 mL of pure water heated to 60°C. These solutions were mixed slowly while stirring. Next, 311.4 parts by weight of bismuth nitrate was added to an aqueous solution of nitric acid obtained by adding 79.3 parts by weight of nitric acid (60% by weight) to 330 mL of pure water, and the solution obtained by completely dissolving it was added to the above solution and carried out. Stir to combine. The slurry was dried by disc spray drying, and the obtained dry powder was precalcined while maintaining the maximum temperature of 440° C. for ...

manufacture example 3

[0140] 800 parts by weight of ammonium heptamolybdate tetrahydrate was completely dissolved in 3040 parts by weight of pure water heated to 60°C. Next, 11.0 parts by weight of cesium nitrate was dissolved in 100 mL of pure water, and added to the above solution. Next, 259.3 parts by weight of iron nitrate nonahydrate, 769.3 parts by weight of cobalt nitrate hexahydrate, and 109.8 parts by weight of nickel nitrate hexahydrate were dissolved in 615 mL of pure water heated to 60°C. These solutions were mixed slowly while stirring. Next, 274.8 parts by weight of bismuth nitrate was added to an aqueous solution of nitric acid obtained by adding 70.0 parts by weight of nitric acid (60% by weight) to 300 mL of pure water, and the solution obtained by completely dissolving it was added to the above solution and carried out. Stir to combine. The slurry was dried by disc spray drying, and the obtained dry powder was precalcined while maintaining the maximum temperature of 440° C. for ...

technical field

[0001] The present invention relates to a novel catalyst capable of obtaining a target product with high activity and a high yield, and particularly relates to a catalyst capable of being stable even in a region where the catalyst activity is high when producing an unsaturated aldehyde, an unsaturated carboxylic acid, or a conjugated diene by oxidation. A catalyst and a method for producing the same can be produced with a high yield. Background technique

[0002] Methods for producing corresponding unsaturated aldehydes and unsaturated carboxylic acids using propylene, isobutene, t-butanol, etc. as raw materials, and gas-phase catalytic oxidation methods for producing 1,3-butadiene from butenes are widely practiced industrially. In particular, many reports have been made on methods of producing corresponding unsaturated aldehydes and unsaturated carboxylic acids using propylene, isobutylene, tert-butanol, etc. as raw materials as means to increase their yield...

Examples

manufacture example 1

[0128] 800 parts by weight of ammonium heptamolybdate tetrahydrate was completely dissolved in 3040 parts by weight of pure water heated to 60°C. Next, 5.59 parts by weight of potassium nitrate was dissolved in 55 mL of pure water, and added to the above solution. Next, 274.6 parts by weight of iron nitrate nonahydrate, 571.5 parts by weight of cobalt nitrate hexahydrate, and 307.4 parts by weight of nickel nitrate hexahydrate were dissolved in 611 mL of pure water heated to 60°C. These solutions were mixed slowly while stirring. Next, 311.4 parts by weight of bismuth nitrate was added to an aqueous solution of nitric acid obtained by adding 79.3 parts by weight of nitric acid (60% by weight) to 330 mL of pure water, and the solution obtained by completely dissolving it was added to the above solution and carried out. Stir to combine. The slurry was dried by disc spray drying, and the obtained dry powder was precalcined while maintaining the maximum temperature of 440° C. fo...

manufacture example 2

[0134] 800 parts by weight of ammonium heptamolybdate tetrahydrate was completely dissolved in 3040 parts by weight of pure water heated to 60°C. Next, 11.0 parts by weight of cesium nitrate was dissolved in 100 mL of pure water, and added to the above solution. Next, 259.3 parts by weight of iron nitrate nonahydrate, 791.3 parts by weight of cobalt nitrate hexahydrate, and 109.8 parts by weight of nickel nitrate hexahydrate were dissolved in 615 mL of pure water heated to 60°C. These solutions were mixed slowly while stirring. Next, 311.4 parts by weight of bismuth nitrate was added to an aqueous solution of nitric acid obtained by adding 79.3 parts by weight of nitric acid (60% by weight) to 330 mL of pure water, and the solution obtained by completely dissolving it was added to the above solution and carried out. Stir to combine. The slurry was dried by disc spray drying, and the obtained dry powder was precalcined while maintaining the maximum temperature of 440° C. for ...

manufacture example 3

[0140] 800 parts by weight of ammonium heptamolybdate tetrahydrate was completely dissolved in 3040 parts by weight of pure water heated to 60°C. Next, 11.0 parts by weight of cesium nitrate was dissolved in 100 mL of pure water, and added to the above solution. Next, 259.3 parts by weight of iron nitrate nonahydrate, 769.3 parts by weight of cobalt nitrate hexahydrate, and 109.8 parts by weight of nickel nitrate hexahydrate were dissolved in 615 mL of pure water heated to 60°C. These solutions were mixed slowly while stirring. Next, 274.8 parts by weight of bismuth nitrate was added to an aqueous solution of nitric acid obtained by adding 70.0 parts by weight of nitric acid (60% by weight) to 300 mL of pure water, and the solution obtained by completely dissolving it was added to the above solution and carried out. Stir to combine. The slurry was dried by disc spray drying, and the obtained dry powder was precalcined while maintaining the maximum temperature of 440° C. for ...

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