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Bionic iron-based catalyst, preparation method and application thereof

A technology of catalyst and biomimetic iron, which is used in the preparation of carbon-based compounds, catalytic reactions, chemical instruments and methods, etc., can solve the problems of environmental pollution, research stagnation, and high energy consumption

Pending Publication Date: 2020-10-20
NANJING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For the gas-phase selective oxidation of toluene, in the past few decades, researchers have carried out extensive and in-depth research on catalysts for the gas-phase oxidation of toluene, but the reaction still faces high reaction temperature (300-550°C), complex reaction process, and the target product Low selectivity, environmental pollution, high energy consumption and other issues
Moreover, research on this reaction has almost stagnated in recent years

Method used

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  • Bionic iron-based catalyst, preparation method and application thereof
  • Bionic iron-based catalyst, preparation method and application thereof
  • Bionic iron-based catalyst, preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0058] Embodiment 1 prepares Fe 2 o 3 / γ-Al 2 o 3 、HDPA-Fe 2 o 3 / γ-Al 2 o 3

[0059] According to Fe 2 o 3 The mass of 0.3g is converted into the corresponding mass of ferric nitrate, and the corresponding mass of ferric nitrate is added to a beaker containing a certain amount of water. Weigh 0.9g of γ-Al 2 o 3 (γ-Al used in the present invention 2 o 3 The morphology of was characterized by transmission electron microscopy, such as figure 1 shown in the nanorod-like structure), the ferric nitrate solution was impregnated into the γ-Al 2 o 3 Then the obtained mud was dried in an oven at 80°C for 12 hours, and then ground into powder with an agate mortar. The obtained powder was placed in a tube furnace, raised from normal temperature to 450°C at a rate of 5°C / min under a flowing air atmosphere, and calcined at this temperature for 3 hours to obtain Fe 2 o 3 / γ-Al 2 o 3 . The morphology of the obtained product was characterized by transmission electron micr...

Embodiment 2

[0060] Embodiment 2 prepares (Fe 2 o 3 -CeO 2 ) / γ-Al 2 o 3 , HDPA-(Fe 2 o 3 -CeO 2 ) / γ-Al 2 o 3

[0061] According to (Fe 2 o 3 -CeO 2 ) has a mass of 0.3g, Fe 2 o 3 and CeO 2 The mass ratio is 3:2, and they are respectively converted into the mass of the corresponding metal salt, and then the corresponding mass of ferric nitrate and cerium nitrate is added to a beaker containing a certain amount of water. Weigh 0.9g of γ-Al 2 o 3 , using the equal volume impregnation method to impregnate the above mixed metal salt solution into γ-Al 2 o 3Then the obtained mud was dried in an oven at 80°C for 12 hours, and then ground into powder with an agate mortar. The obtained powder was placed in a tube furnace, raised from normal temperature to 450°C at a rate of 5°C / min under a flowing air atmosphere, and calcined at this temperature for 3 hours to obtain (Fe 2 o 3 -CeO 2 ) / γ-Al 2 o 3 . Next, add a certain amount of hexadecylphosphonic acid (HDPA) into a beaker ...

Embodiment 3

[0062] Embodiment 3 prepares (Fe 2 o 3 -NiO) / γ-Al 2 o 3 , HDPA-(Fe 2 o 3 -NiO) / γ-Al 2 o 3

[0063] According to (Fe 2 o 3 -NiO) has a mass of 0.3g, Fe 2 o 3 The mass ratio of NiO and NiO is 3:2, and they are respectively converted into the mass of the corresponding metal salt, and then the corresponding mass of ferric nitrate and nickel nitrate is added to a beaker containing a certain amount of water. Weigh 0.9g of γ-Al 2 o 3 , using the equal volume impregnation method to impregnate the above mixed metal salt solution into γ-Al 2 o 3 Then the obtained mud was dried in an oven at 80°C for 12 hours, and then ground into powder with an agate mortar. The obtained powder was placed in a tube furnace, raised from normal temperature to 450°C at a rate of 5°C / min under a flowing air atmosphere, and calcined at this temperature for 3 hours to obtain (Fe 2 o 3 -NiO) / γ-Al 2 o 3 . Next, add a certain amount of hexadecylphosphonic acid (HDPA) into a beaker containing ...

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Abstract

The invention belongs to the technical field of chemical synthesis, and particularly discloses a bionic iron-based catalyst, a preparation method and application thereof, wherein the general formula of the bionic iron-based catalyst disclosed by the invention is HDPA-(Fe2O3-MOx) / gamma-Al2O3. The catalyst is simple to prepare, stable in application and good in repeatability, and has low requirements on toluene gas-phase oxidation conditions and good activity, the produced benzaldehyde does not contain halogen, the purity is high, and the reaction process is pollution-free.

Description

technical field [0001] The invention belongs to the technical field of chemical synthesis, and in particular relates to a biomimetic iron-based catalyst, a preparation method and an application. Background technique [0002] Selective oxidation of alkanes with molecular oxygen is usually the least selective of the various catalytic reactions, often producing significant amounts of CO in addition to the desired partial oxidation products x and water. This leads to complex and costly separations, which in turn makes the reaction process unusually capital-intensive. In the selective oxidation of many alkanes, by O 2 Catalytic selective oxidation of benzyl C–H bond in toluene to benzaldehyde is the best way to produce benzaldehyde. Among them, benzaldehyde is an important high value-added chemical, which is widely used in the synthesis of organic compounds such as spices, medicine, and agriculture. However, the non-catalytic autoxidation activity of benzaldehyde under aerobi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J31/28B01J31/34B01J31/36B01J31/02C07C47/54C07C45/33
CPCB01J31/28B01J31/34B01J31/36B01J31/0268C07C45/33B01J2231/70C07C47/54
Inventor 丁维平邓长顺郭向可彭路明
Owner NANJING UNIV