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A kind of preparation method of magnetic load cerium oxide for treating waste gas

A magnetic loading and cerium oxide technology, which is applied in chemical instruments and methods, physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, etc., can solve the problem of single structure of cerium oxide and achieve good catalytic effect , to promote the catalytic effect

Active Publication Date: 2018-08-14
CHANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a method for preparing magnetically loaded cerium oxide used to treat waste gas in order to overcome the shortcomings of the single structure of cerium oxide in the prior art

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] FeCl 2 Dissolve it in water and configure it as a solution with a concentration of 3mol / L. Take 500mL of this solution and place it in a water bath with a constant temperature of 75°C. At the same time, add 3mL of hydrogen peroxide with a mass fraction of 30% and a certain amount of NaOH dilute solution dropwise to maintain the pH value. It was 13, reacted for 3 hours, transferred to an autoclave, raised the temperature to 180°C within 1 hour, continued to react for 8 hours, and naturally cooled to room temperature. During this process, a precipitate with a layered structure was formed, separated from the precipitate, and washed 3 times with deionized water; Add the precipitated solid to the sodium dodecylbenzenesulfonate solution with a concentration of 3 mol / L, the solid-to-liquid ratio is 1:20, stir in a water bath at 80°C for 8 hours, and wash with deionized water three times after magnetic field separation , and dried at 90°C to obtain magnetic organic hydrotalcite...

Embodiment 2

[0018] FeCl 2 Dissolve it in water and configure it as a solution with a concentration of 3mol / L. Take 500mL of this solution and place it in a water bath with a constant temperature of 80°C. At the same time, add 4mL of hydrogen peroxide with a mass fraction of 30% and a certain amount of NaOH dilute solution dropwise to maintain the pH value. It was 13, reacted for 3 hours, transferred to an autoclave, raised the temperature to 180°C within 1 hour, continued to react for 8 hours, and naturally cooled to room temperature. During this process, a precipitate with a layered structure was formed, separated from the precipitate, and washed 3 times with deionized water; Add the precipitated solid to the sodium dodecylbenzenesulfonate solution with a concentration of 4 mol / L, the solid-to-liquid ratio is 1:50, stir in a water bath at 80°C for 8 hours, and wash with deionized water three times after magnetic field separation , and dried at 90°C to obtain magnetic organic hydrotalcite...

Embodiment 3

[0021] FeCl 2 Dissolve it in water and configure it as a solution with a concentration of 2mol / L. Take 500mL of this solution and place it in a water bath with a constant temperature of 70°C. At the same time, add 2mL of hydrogen peroxide with a mass fraction of 30% and a certain amount of NaOH dilute solution dropwise to maintain the pH value. 12, reacted for 2 hours, transferred to an autoclave, raised the temperature to 150°C within 1 hour, continued to react for 4 hours, and naturally cooled to room temperature. During this process, a precipitate with a layered structure was formed, separated from the precipitate, and washed twice with deionized water; Add the precipitated solid to the sodium dodecylbenzenesulfonate solution with a concentration of 2mol / L, the solid-to-liquid ratio is 1:10, stir in a water bath at 50°C for 2 hours, and wash it twice with deionized water after magnetic field separation , and dried at 70°C to obtain magnetic organic hydrotalcite. Add 2 mol ...

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PUM

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Abstract

The invention discloses a preparation method of magnetically supported cerium oxide for treating waste gas. It includes the following steps in sequence: under constant temperature water bath conditions, dropwise add hydrogen peroxide and NaOH dilute solution to the FeCl2 solution, stir and transfer to the autoclave, continue the reaction, naturally cool to room temperature, obtain a solid precipitate, and add it to dodecane In sodium benzene sulfonate solution, magnetic organic hydrotalcite is obtained. Prepare a solution of (3-aminopropyl)triethoxysilane, salicylaldehyde and cerium trichloride in an amount of 1:1:1 (molar ratio), add magnetic organic hydrotalcite to form a cerium-containing organic complex Pillared hydrotalcite; the cerium-containing organic complex pillared hydrotalcite is placed in a muffle furnace and roasted at 400-550°C for 6-8 hours. The carbon, nitrogen and other elements in it are converted into gases and overflow to form pores, thereby obtaining magnetic collaborative oxidation. Cerium catalyst. This structure is conducive to adsorbing and catalyzing pollutants, and is also conducive to separation.

Description

technical field [0001] The invention relates to the development of new materials for environmental pollution control, in particular to a preparation method for magnetically loaded cerium oxide used for treating waste gas. Background technique [0002] Hydrotalcite-like compounds (LDHs) are compounds formed by stacking interlayer anions and positively charged laminates. The general formula of hydrotalcite chemical structure is: [M 2+ 1-x m 3+ x(OH) 2 ] x+ [(A n- ) x / n mH 2 O], where M 2+ and M 3+ are the divalent and trivalent metal cations, such as Mg, located on the host laminates, respectively 2+ 、Ni 2+ , Zn 2+ , Mn 2+ 、Cu 2+ 、Co 2+ , Pd 2+ , Fe 2+ Equal divalent cations and Al 3 + 、Cr 3+ 、Co 3+ , Fe 3+ and other trivalent cations can form hydrotalcite; A n– It is an interlayer anion, which can include inorganic anion, organic anion, complex anion, same polyanion and heteropolyanion; x is M 3+ / (M 2+ +M 3+ ) The molar ratio is about 4:1 to 2:1; m ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/83B01J35/10
CPCB01J23/83B01J35/33B01J35/60
Inventor 黄文艳赵文昌
Owner CHANGZHOU UNIV
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