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Preparation method of magnetic loading cerium oxide for exhaust gas treatment

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: 2016-11-09
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 30% (mass fraction) hydrogen peroxide and a certain amount of NaOH dilute solution dropwise to maintain the pH The value 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 for 3 hours after magnetic field separation and dried at 90°C to obtain magnetic organic hydrotalcite. Add 4...

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 30% (mass fraction) hydrogen peroxide and a certain amount of NaOH dilute solution dropwise to maintain the pH The value 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 for 3 hours after magnetic field separation and dried at 90°C to obtain magnetic organic hydrotalcite. Add 4...

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 30% (mass fraction) hydrogen peroxide and a certain amount of NaOH dilute solution dropwise to maintain the pH The value is 12, react for 2 hours, transfer to an autoclave, heat up to 150°C within 1 hour, continue to react for 4 hours, and naturally cool to room temperature. During this process, a precipitate with a layered structure is formed. The precipitate is separated 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 with deionized water for 2 hours after magnetic field separation and drying at 70°C to obtain magnetic organic hydrotalcite. Add 2 mol of (3-aminopropyl)trietho...

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PUM

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Abstract

The invention discloses a preparation method of magnetic loading cerium oxide for exhaust gas treatment. The method sequentially comprises the following steps: adding hydrogen peroxide and a dilute NaOH solution to a FeCl2 solution in a dropwise manner under a thermostatic water bath condition, stirring the solutions, transferring the finally obtained solution to an autoclave, continuously carrying out a reaction, naturally cooling the obtained reaction product to room temperature to obtain a solid precipitate, and adding the solid precipitate to a sodium dodecyl benzene sulfonate solution to obtain magnetic organic hydrotalcite; preparing a formation solution from (3-aminopropyl)triethoxysilane, salicylaldehyde and cerium trichloride according to a molar ratio of 1:1:1, and adding magnetic organic hydrotalcite to form a cerium-containing organic complex pillared hydrotalcite; and adding the cerium-containing organic complex pillared hydrotalcite to a muffle furnace, roasting the cerium-containing organic complex pillared hydrotalcite at 400-550 DEG C for 6-8h to convert carbon and nitrogen elements into gas which overflows and form tunnels in order to obtain the magnetic synergistic cerium oxide catalyst. The above structure of the catalyst is in favor of adsorbing and catalyzing pollutants, and is also in favor of separating.

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 Applications(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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