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Composite oxide catalyst and method for producing same

A composite oxide and manufacturing method technology, applied in metal/metal oxide/metal hydroxide catalysts, catalyst activation/preparation, physical/chemical process catalysts, etc., can solve the problems of metal oxides affecting catalyst performance, etc. The effect of good catalyst performance

Inactive Publication Date: 2013-08-28
ASAHI KASEI KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Furthermore, in recent years, it has been known that the physical properties of metal oxides, which cannot be expressed only by the composition ratio, also affect the catalyst performance.

Method used

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  • Composite oxide catalyst and method for producing same
  • Composite oxide catalyst and method for producing same
  • Composite oxide catalyst and method for producing same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0325] (manufacture of dry powder)

[0326] dry powder (D 1 ) is manufactured as follows.

[0327] Add 432.1g ammonium heptamolybdate [(NH 4 ) 6 Mo 7 o 24 4H 2 O], 59.9g ammonium metavanadate [NH 4 VO 3 ], 84.3g antimony trioxide [Sb 2 o 3 ] and 4.8g cesium nitrate [Ce(NO 3 ) 3 ·6H 2 O], heated at 95° C. for 1 hour while stirring, thereby producing an aqueous raw material solution (A 1 ).

[0328] To 378.4g niobium mixture (B 0 ) containing 30% by mass H 2 o 2 66.3g of hydrogen peroxide solution, stirred and mixed at room temperature for 10 minutes, thereby making aqueous raw material solution (B 1 ).

[0329] The obtained aqueous raw material solution (A 1 ) after cooling to 70°C, to the aqueous raw material solution (A 1 ) containing 34.0 mass% SiO 2 807.8g of silica sol, further adding 30% by mass H 2 o 2 98.4 g of hydrogen peroxide solution was stirred continuously for 30 minutes at 55°C. Next, to this liquid, sequentially add the aqueous raw materi...

Embodiment 2

[0342] (manufacture of dry powder)

[0343] dry powder (D 1 ) is manufactured as follows.

[0344] Add 611.5g ammonium heptamolybdate [(NH 4 ) 6 Mo 7 o 24 4H 2 O], 84.7g ammonium metavanadate [NH 4 VO 3 ], 119.3g antimony trioxide [Sb 2 o 3 ] and 6.8g cesium nitrate [Ce(NO 3 ) 3 ·6H 2 O], heated at 95° C. for 1 hour while stirring, thereby producing an aqueous raw material solution (A 1 ).

[0345] To 535.5g niobium mixture (B 0 ) containing 30% by mass H 2 o 2 93.8g of hydrogen peroxide solution, stirred and mixed at room temperature for 10 minutes, thereby making aqueous raw material solution (B 1 ).

[0346] The obtained aqueous raw material solution (A 1 ) after cooling to 70°C, to the aqueous raw material solution (A 1 ) containing 34.0 mass% SiO 2 429.7g of silica sol, further adding 30% by mass H 2 o 2 98.4 g of hydrogen peroxide solution was stirred continuously for 30 minutes at 55°C. Next, to this liquid, sequentially add the aqueous raw mater...

Embodiment 3

[0357] (manufacture of dry powder)

[0358] dry powder (D 1 ) is manufactured as follows.

[0359] Add 285.4g ammonium heptamolybdate [(NH 4 ) 6 Mo 7 o 24 4H 2 O], 39.5g ammonium metavanadate [NH 4 VO 3 ], 55.7g antimony trioxide [Sb 2 o 3 ] and 3.2g cesium nitrate [Ce(NO 3 ) 3 ·6H 2 O], heated at 95° C. for 1 hour while stirring, thereby producing an aqueous raw material solution (A 1 ).

[0360] To 249.9g niobium mixture (B 0 ) containing 30% by mass H 2 o 2 43.8g of hydrogen peroxide solution, stirred and mixed at room temperature for 10 minutes, thereby making aqueous raw material solution (B 1 ).

[0361] The obtained aqueous raw material solution (A 1 ) after cooling to 70°C, to the aqueous raw material solution (A 1 ) containing 34.0 mass% SiO 2 1117.2g of silica sol, further adding 30% by mass H 2 o 2 98.4 g of hydrogen peroxide solution was stirred continuously for 30 minutes at 55°C. Next, to this liquid, sequentially add the aqueous raw mater...

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Abstract

A method for producing a composite oxide catalyst that contains a composite oxide represented by the compositional formula Mo1VaSbbNbcWdZeOn (in the formula, component Z denotes an element such as La, Ce, Pr, Yb, Y, Sc, Sr or Ba, the values of a, b, c, d, e and n are such that 0.1 = a = 0.4, 0.1 = b = 0.4, 0.01 = c = 0.3, 0 = d = 0.2, 0 = e = 0.1, and the a / b and a / c atomic ratios are such that 0.85 = a / b < 1.0 and 1.4 < a / c < 2.3), wherein the production method includes the following steps: a step of preparing a specific raw material preparation that contains Mo, V, Sb, Nb, W and Z; a step of drying the raw material preparation so as to obtain a dried powder; a step of subjecting the dried powder to preliminary firing so as to obtain a preliminarily fired body; a step of subjecting the preliminarily fired body to main firing so as to obtain a fired body having protrusions on the surface of particles; and a step of removing the protrusions by means of an air stream. The reduction rate of the preliminarily fired body is 8 to 12% and the specific surface area of the fired body is 7 to 20 m2 / g.

Description

technical field [0001] The present invention relates to a composite oxide catalyst used in gas-phase catalytic oxidation or gas-phase catalytic ammoxidation of propane or isobutane, a method for producing the same, and a method for producing unsaturated acid or unsaturated nitrile using the composite oxide catalyst. Background technique [0002] Conventionally, methods for producing corresponding unsaturated carboxylic acids or unsaturated nitriles from propylene or isobutylene by gas-phase catalytic oxidation or gas-phase catalytic ammoxidation are well known. In recent years, a method of producing corresponding unsaturated carboxylic acid or unsaturated nitrile from propane or isobutane by gas-phase catalytic oxidation or gas-phase catalytic ammoxidation instead of propylene or isobutene has attracted attention. Therefore, various oxide catalysts have been proposed as catalysts for gas-phase catalytic ammoxidation of propane or isobutane. [0003] The ammoxidation catalys...

Claims

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Application Information

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IPC IPC(8): B01J23/30B01J23/28B01J35/10B01J37/00B01J37/04B01J37/08C07C253/24C07C255/08C07B61/00
CPCB01J23/002B01J23/28B01J37/08B01J2523/00C07C253/24Y02P20/52B01J23/30B01J35/612B01J35/613B01J2523/3712B01J2523/53B01J2523/55B01J2523/56B01J2523/68B01J2523/69B01J2523/41C07C255/08C07C51/215
Inventor 石井悠辅加藤高明
Owner ASAHI KASEI KK
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