Composite metal oxide for unsaturated aldehyde selective oxidation and preparing method thereof

A composite oxide, composite metal technology, applied in chemical instruments and methods, chemical/physical processes, physical/chemical process catalysts, etc., can solve problems such as blocked pipelines, loss of molybdenum, and reduced catalyst activity

Active Publication Date: 2005-02-23
兰州金润宏成新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The loss of molybdenum will reduce the activity, selectivity, strength and service life of the catalyst, and the deposition of molybdenum in the downstream of the reaction system will block the pipeline and affect the long-term operation of the system

Method used

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  • Composite metal oxide for unsaturated aldehyde selective oxidation and preparing method thereof
  • Composite metal oxide for unsaturated aldehyde selective oxidation and preparing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] 600 ml of deionized water was vigorously stirred, followed by adding 44.7 g of ammonium metavanadate and 195.5 g of ammonium molybdate and heated to dissolve them, forming a mixed salt solution A. Aqueous solution B of 54.7 g of copper nitrate dissolved in 60 ml of deionized water was added. The co-precipitated slurry formed was evaporated to dryness under continuous heating and vigorous stirring to solid, and then pulverized to form powder C which passed through a 60-mesh standard sieve.

[0030]45 grams of antimony trioxide passed through a 300-mesh standard sieve and 12.3 grams of anatase-type titanium dioxide passed through a 300-mesh standard sieve were fully mixed, roasted at 80°C for 3 hours, and then pulverized to form powder D passing through a 60-mesh standard sieve.

[0031] 210 grams of powder C and 3.7 grams of powder D were fully mixed with 26 grams of silica sol containing 15% (by mass) of silicon dioxide, and formed into catalyst particles of φ4×4mm. De...

Embodiment 2

[0041] Add 44.7 g of ammonium metavanadate, 195.5 g of ammonium molybdate, and 54.1 g of ammonium paratungstate to 600 ml of deionized water under strong stirring, and heat to dissolve them to form a mixed salt solution A. Aqueous solution B of 54.7 g of copper nitrate dissolved in 60 ml of deionized water was added. The co-precipitated slurry formed was evaporated to dryness under continuous heating and vigorous stirring, and then pulverized to form powder C which passed through a 60-mesh standard sieve.

[0042] 45 grams of antimony trioxide passed through a 300-mesh standard sieve and 12.3 grams of anatase-type titanium dioxide passed through a 300-mesh standard sieve were fully mixed, roasted at 80°C for 3 hours, and then pulverized to form powder D passing through a 60-mesh standard sieve.

[0043] 245 grams of powder C was calcined at 200 C for 3 hours, then fully mixed with 3.7 grams of powder D and 30 grams of silica sol containing 15% (mass) of silicon dioxide, and fo...

Embodiment 3

[0047] Add 44.7 g of ammonium metavanadate, 195.5 g of ammonium molybdate, 27.5 g of ammonium paratungstate and 11.0 g of niobium pentoxide in 600 ml of deionized water under strong stirring, and heat to dissolve them to form a mixed salt solution A. Aqueous solution B of 54.7 g of copper nitrate dissolved in 60 ml of deionized water was added. The co-precipitated slurry formed was evaporated to dryness under continuous heating and vigorous stirring, and then pulverized to form powder C which passed through a 60-mesh standard sieve.

[0048] 45 grams of antimony trioxide passed through a 300-mesh standard sieve and 12.3 grams of anatase-type titanium dioxide passed through a 300-mesh standard sieve were fully mixed, roasted at 80°C for 3 hours, and then pulverized to form powder D passing through a 60-mesh standard sieve.

[0049] 235 grams of powder C and 3.7 grams of powder D were fully mixed with 30 grams of silica sol containing 15% (by mass) of silicon dioxide, and formed...

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Abstract

A composite metallic oxide as catalyst for selective oxidization of unsaturated aldehyde, especially the acrylaldehyde or methyl acrylaldehyde to obtain acrylic acid or methyl acrylic acid, is composed of active components (Mo, V and Cu), stabilizer (at least Sb and Ti) and the composite oxide of Ni, Fe, Si, Al, alkali metal and alkali-earth metal. Its preparing process is also disclosed.

Description

technical field [0001] The present invention relates to a composite metal oxide catalyst for the selective oxidation reaction of a gas containing unsaturated aldehyde and a gas containing molecular oxygen in the gas phase, in particular to a gas-phase selective oxidation of acrolein or methacrolein Oxidation produces the corresponding composite metal oxide catalyst of acrylic acid or methacrylic acid. Background technique [0002] The gas-phase catalytic oxidation of unsaturated aldehydes to unsaturated carboxylic acids is a general industrial production method, that is, after mixing low-carbon unsaturated aldehydes with molecular oxygen gas and water vapor, they enter a reactor equipped with a suitable catalyst to make unsaturated aldehydes generate unsaturated carboxylic acid. Unsaturated aldehydes are in particular acrolein, methacrolein or methacrolein, and unsaturated carboxylic acids are in particular the corresponding acrylic, methacrylic or methacrylic acids. [00...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/057C07C57/055
Inventor 谷育英
Owner 兰州金润宏成新材料科技有限公司
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