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Supported phosphorus-vanadium-cesium-lanthanum catalyst and application thereof

The technology of phosphorus vanadium cesium lanthanum and catalyst is applied in the field of catalysts for synthesizing methyl acrylate, and can solve the problems of increased industrial production cost of catalysts, increased operational difficulty and the like, and achieve the effects of long service life, reduced production cost, and improved service life.

Inactive Publication Date: 2012-09-05
TAIYUAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Catalyst deactivation will lead to increased industrial production costs and increased operational difficulty

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] 1.17g NH 4 VO 3 Add 100ml of lactic acid aqueous solution with a concentration of 5% by volume and heat to dissolve, add 30.0g of 20-30 mesh silica gel carrier, stir for 2 hours, add 0.69g of 85%H 3 PO 4 Aqueous solution, stirred for 2h, dried at 110°C for 6h, and calcined at 450°C for 6 hours in a nitrogen atmosphere. 0.20g of CsNO 3 and 0.04g of La(NO 3 ) 3 ·6H 2 Dissolve O in 100ml of water, impregnate the solid obtained after roasting, dry at 110°C for 6 hours, and roast at 450°C for 6 hours in a nitrogen atmosphere to prepare a supported phospho-vanadium-cesium-lanthanum catalyst.

[0019] Get 10ml of the prepared above-mentioned catalyst and put it into the constant temperature section of the fixed-bed reactor (φ10×500mm), under the protection of nitrogen, the catalytic bed layer is heated up to 300°C, with nitrogen as the carrier gas, according to the methyl acetate / formaldehyde molar ratio of 1:1, the molar ratio of methyl acetate / carrier gas is 1:2, and ...

Embodiment 2

[0021] 5.40g NH 4 VO 3 Add 100ml of lactic acid aqueous solution with a concentration of 20% by volume and heat to dissolve, add 30.0g of 30-40 mesh silica gel carrier, stir for 1h, add 6.39g of 85%H 3 PO 4 Aqueous solution, stirred for 1h, dried at 115°C for 4h, and calcined at 500°C for 4 hours in a nitrogen atmosphere. 2.61g of CsNO 3 and 1.00g of La(NO 3 ) 3 ·6H 2 Dissolve O in 100ml of water, impregnate the solid obtained after roasting, dry at 115°C for 4 hours, and roast at 500°C for 10 hours in a nitrogen atmosphere to prepare a supported phosphovanadium-cesium-lanthanum catalyst.

[0022] Get 10ml of the prepared above-mentioned catalyst and put it into the constant temperature section of the fixed-bed reactor (φ10×500mm), under the protection of nitrogen, the catalytic bed layer is heated up to 360°C, with nitrogen as the carrier gas, according to the methyl acetate / formaldehyde molar ratio of 3:1, the molar ratio of methyl acetate / carrier gas is 1:5, and the ...

Embodiment 3

[0024] 6.74g NH 4 VO 3 Add 100ml of lactic acid aqueous solution with a concentration of 20% by volume and heat to dissolve, add 30.0g of 20-30 mesh silica gel carrier, stir for 3h, add 7.31g of 85%H 3 PO 4 Aqueous solution, stirred for 3h, dried at 105°C for 12h, and calcined at 550°C for 8 hours in a nitrogen atmosphere. 12.35g of CsNO 3 and 0.49g of La(NO 3 ) 3 ·6H 2Dissolve O in 100ml of water, impregnate the solid obtained after roasting, dry at 105°C for 12 hours, and roast at 550°C for 8 hours in a nitrogen atmosphere to prepare a supported phospho-vanadium-cesium-lanthanum catalyst.

[0025] Get 10ml of the prepared above-mentioned catalyst and put it into the constant temperature section of the fixed-bed reactor (φ10×500mm), under the protection of nitrogen, the catalytic bed layer is heated up to 400°C, with nitrogen as the carrier gas, according to the methyl acetate / formaldehyde molar ratio of 3:1, the molar ratio of methyl acetate / carrier gas is 1:3, and th...

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Abstract

The invention relates to a supported phosphorus-vanadium-cesium-lanthanum catalyst and application thereof, particularly a catalyst for synthesizing methyl acrylate from formaldehyde and methyl acetate and application thereof.. The invention aims to provide a catalyst for preparing methyl acrylate from methyl acetate and formaldehyde, which has the advantages of high catalytic performance and long service life, and application thereof. According to the technical scheme, the active components of the catalyst are vanadium, phosphorus, cesium and lanthanum, the charge capacity of vanadium is 0.2-2 mmol / g, and the V:P:Cs:La mol ratio is 1:(0.5-1.5):(0.1-1.1):(0.01-0.05). The invention can be used for preparing methyl acrylate from methyl acetate and formaldehyde, and has the advantages of high catalytic performance and long service life.

Description

technical field [0001] The invention relates to a supported phosphorus vanadium cesium lanthanum catalyst and its application, in particular to a catalyst for synthesizing methyl acrylate with formaldehyde and methyl acetate as raw materials and its application. Background technique [0002] Methyl acrylate is an important organic chemical raw material, which can be used in the production of superabsorbent resins, detergent builders and water treatment agents, and is widely used in various fields such as coatings, chemical fibers, textiles, leather, plastics, adhesives, and oil exploration. Industrially, methyl acrylate is mainly obtained by esterification of acrylic acid and methanol. The propylene oxidation method is the production method of acrylic acid widely used in the world at present. All acrylic acid production facilities in my country adopt this method. In addition, a propane selective oxidation process is also being developed. However, because the deep oxidatio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/198C07C69/54C07C67/343
Inventor 张志强王慧芳
Owner TAIYUAN UNIV OF TECH
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