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Catalyst for producing acrylic acid through oxidation of acrolein, and preparation method thereof

A catalyst, acrolein technology, applied in the preparation of organic compounds, physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, etc., can solve the problem of reducing catalyst selectivity, affecting catalyst yield and stability and other problems, to achieve the effect of good applicability, wide application range and extended service life

Active Publication Date: 2018-08-21
SHANGHAI HUAYI NEW MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to ensure the conversion rate of acrolein at a certain level, it is necessary to gradually increase the reaction temperature, and the increase of the reaction temperature will reduce the selectivity of the catalyst and affect the yield and stability of the catalyst.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0111] Add 125.0g of ammonium paramolybdate, 34.2g of ammonium metatungstate, 40.5g of ammonium metavanadate, 2.6g of strontium nitrate and 2.0g of antimony trioxide into 600.0g of water at 80°C, stir and dissolve to obtain solution 1. Add 20.0 g of copper nitrate and 4.0 g of nickel nitrate into 60.0 g of water at 60°C, stir and dissolve to obtain solution 2. Solution 2 was poured into solution 1 at 60°C to obtain a mixture, and dried at 120°C for 12 hours to obtain oxide A.

[0112] Add 30.0 g of ammonium paramolybdate and 8.0 g of antimony trioxide into 100.0 g of water at 80°C and stir for 16 hours, dry at 120°C for 12 hours, and roast at 160°C for 8 hours to obtain oxide B.

[0113] Mix 74.0g of oxide A, 26.0g of oxide B and 85g of silicon powder evenly, then add 10.0g of silica sol (30%), knead and extrude to form cylindrical particles with a diameter of 1mm and a length of 2mm. The pellets were used for the acrolein oxidation reaction after being calcined at 390°C for ...

Embodiment 2

[0116] Add 125.0g ammonium paramolybdate, 31.0g ammonium metatungstate, 37.5g ammonium metavanadate, 2.6g strontium nitrate to 600.0g water at 80°C, stir and dissolve to obtain solution 1; add 20.0g to 60.0g water at 60°C Copper nitrate and 4.0 g of nickel nitrate were stirred and dissolved to obtain solution 2; solution 1 was poured into solution 2 at 60°C to obtain a mixed solution, and dried at 120°C for 12 hours to obtain oxide A.

[0117] Add 40.0g ammonium paramolybdate, 1.2g ammonium metavanadate and 9.8g antimony trioxide to 100.0g water at 100°C, stir for 10 hours to obtain a mixture, dry at 120°C for 12 hours, and roast at 380°C for 4 hours to obtain oxidation Object B.

[0118] Mix 68.8g of oxide A, 31.2g of oxide B and 78.3g of silicon powder evenly, then knead with 10.5g of silica sol (30%), and extrude to form cylindrical particles with a diameter of 1mm and a length of 2mm. The pellets were used for the acrolein oxidation reaction after being calcined at 380°C ...

Embodiment 3

[0121] Add 90.0g ammonium paramolybdate, 19.2g ammonium metatungstate, 23.8g ammonium metavanadate, 3.0g niobium nitrate and 1.1g antimony trioxide to 600.0g water at 80°C, stir and dissolve to obtain solution 1; at 60°C Add 14.8.0 g of copper nitrate and 2.1 g of nickel nitrate to 60.0 g of water, stir and dissolve to obtain solution 2; pour solution 2 into solution 1 at 60°C to obtain a mixed solution, and dry at 150°C for 15 hours to obtain oxide A.

[0122] Add 40.0g ammonium paramolybdate, 1.1g strontium nitrate and 11.30g ethylene glycol antimony to 100.0g water at 80°C, stir for 4 hours to obtain a mixed solution, dry at 100°C for 6 hours, and roast at 200°C for 10 hours to obtain oxide B .

[0123] Mix 78.5g of oxide A, 21.5g of oxide B and 130.0g of silicon powder evenly, then add 3.2g of graphite and 21.0g of silica sol (30%), knead and extrude to form cylindrical particles with a diameter of 1mm and a length of 2mm. The pellets were used for the acrolein oxidation ...

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PUM

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Abstract

The invention discloses a catalyst for producing acrylic acid through oxidation of acrolein, and a preparation method thereof, wherein the catalyst is represented by a formula [Mo12VaCubWcXdYeOf]p[Mo1SbgZhOi]q, X is Nb, Sb, Te, Ca, Ba and Zn, Y is Sr, Ni, La, Ce, Nd, Sm and Cs, Z is V, Cu, Sr, Te, Cd and B, a is 1.5-8.0, b is 0.1-5.0, c is 0.5-5.0, d is 0.01-4.0, e is 0.01-4.0, g is 0.1-1.0, h is0.01-1.0, f and i are the values determined by the oxidation state of the elements, and q / p is 0.1-0.6. The method comprises: dissolving the precursors of Mo, V, W and X to obtain a solution 1, dissolving the precursors of Cu and Y to obtain a mixed solution, combining the solutions, and drying to obtain an oxide A; dissolving the precursors of Mo, Sb and Z to obtain a mixed solution, drying, andcalcining to obtain an oxide B; and mixing the oxide A and the oxide B, molding, and calcining to obtain the catalyst.

Description

technical field [0001] The invention provides a catalyst for producing acrylic acid by oxidation of acrolein and a preparation method thereof. The catalyst prepared by the method of the invention has good adaptability to the reaction temperature, and the selectivity of the reaction temperature can remain unchanged in a wide temperature range even if the reaction temperature is increased. Therefore, it can react at a lower temperature and has a wide range of temperature applications, which is beneficial to prolonging the service life of the catalyst, and is very suitable for application in industrial devices. The catalyst of the invention is suitable for tail gas circulation and non-tail gas circulation processes. Background technique [0002] The technology of two-step oxidation of propylene to acrylic acid has been studied since the 1950s, and the entire research and development process has gone through about 60 years. The two-step oxidation of propylene to acrylic acid h...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/888C07C51/235C07C57/055
CPCB01J23/002B01J23/8885B01J2523/00C07C51/235B01J2523/17B01J2523/24B01J2523/53B01J2523/55B01J2523/68B01J2523/69B01J2523/847B01J2523/56B01J2523/27B01J2523/3706C07C57/04
Inventor 冯世强李雪梅蔡敏庄岩马建学
Owner SHANGHAI HUAYI NEW MATERIAL
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