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Manganese-containing catalyst for removing formaldehyde at room temperature and preparation method thereof

A manganese catalyst, room temperature technology, applied in the field of preparation of manganese-containing catalysts, can solve the problem of limited catalytic oxidation capacity of formaldehyde

Inactive Publication Date: 2019-03-26
NANKAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these catalysts have very limited ability to catalyze the oxidation of formaldehyde at room temperature

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] (1) At room temperature, add activated carbon to water, oscillate ultrasonically for 1 hour, pour out the supernatant, repeat the above operation three times, and the mass of activated carbon and water are 10 g and 200 g respectively;

[0053] (2) At room temperature, add the activated carbon obtained in step (1) into dilute sulfuric acid, and then pass through O 3 , reacted for 30 min, then the product was subjected to suction filtration, and the filter cake obtained by suction filtration was completely dried to obtain sample A, wherein the concentration of dilute sulfuric acid was 1 mol / L, and the mass of dilute sulfuric acid was 100 g, O 3 The feeding rate is 10 g / h;

[0054] (3) Add manganese nitrate, ferric nitrate, sodium nitrate and sodium carboxymethylcellulose into water under stirring at room temperature, and control the stirring speed to 250 r / min, and stir for 1 hour to obtain solution B, in which manganese nitrate, The masses of ferric nitrate, sodium nitr...

Embodiment 2

[0058] (1) At room temperature, add activated carbon to water, oscillate ultrasonically for 2 hours, pour out the supernatant, repeat the above operation three times, and the mass of activated carbon and water are 10 g and 200 g respectively;

[0059] (2) At room temperature, add the activated carbon obtained in step (1) into dilute sulfuric acid, and then pass through O 3 , reacted for 60 min, then the product was subjected to suction filtration, and the filter cake obtained by suction filtration was completely dried to obtain sample A, wherein the concentration of dilute sulfuric acid was 2 mol / L, and the mass of dilute sulfuric acid was 20 g, O 3 The feeding rate is 20 g / h;

[0060] (3) Add manganese nitrate, ferric nitrate, sodium nitrate and sodium carboxymethylcellulose into water under stirring at room temperature, and control the stirring speed to 300 r / min, and stir for 1 hour to obtain solution B, in which manganese nitrate, The masses of ferric nitrate, sodium nitr...

Embodiment 3

[0064] (1) At room temperature, add activated carbon to water, oscillate ultrasonically for 1 hour, pour out the supernatant, repeat the above operation three times, and the mass of activated carbon and water are 10 g and 200 g respectively;

[0065] (2) At room temperature, add the activated carbon obtained in step (1) into dilute sulfuric acid, and then pass through O 3 , reacted for 30 min, then the product was subjected to suction filtration, and the filter cake obtained by suction filtration was completely dried to obtain sample A, wherein the concentration of dilute sulfuric acid was 1 mol / L, and the mass of dilute sulfuric acid was 100 g, O 3 The feeding rate is 10 g / h;

[0066] (3) Add manganese nitrate, ferric nitrate, potassium nitrate and sodium carboxymethylcellulose into water under stirring at room temperature, and control the stirring speed to 250 r / min, and stir for 1 hour to obtain solution B, in which manganese nitrate, The mass of ferric nitrate, potassium ...

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PUM

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Abstract

The invention provides a preparation method of a manganese-containing catalyst for removing formaldehyde at room temperature. The catalyst takes modified activated carbon as a carrier; the catalyst isprepared by taking manganese dioxide as a main active center and the modified activated carbon as the carrier, loading a manganese-containing active component on the activated carbon carrier throughan immersion method and drying at low temperature and roasting at high temperature under an inert gas atmosphere. According to the preparation method, high-dispersity manganese oxide is used as an active substance for the first time; and the ozone modified activated carbon is used as the carrier and is applied to synthesis of air purification catalyst materials. The manganese-containing catalyst provided by the invention can be used for realizing catalytic oxidization of the formaldehyde and can be applied to the field of air purification.

Description

technical field [0001] The invention proposes a method for preparing a manganese-containing catalyst that uses modified activated carbon as a carrier and is used for removing formaldehyde at room temperature. The catalyst uses manganese dioxide as the main active center and modified activated carbon as the carrier. The preparation steps of the catalyst include four steps: surface modification of active carbon, preparation of manganese-containing active component solution, loading of active component solution on the active carbon, and high-temperature inert gas atmosphere roasting. The catalyst shows good formaldehyde removal ability in the formaldehyde removal reaction at room temperature, and can be applied to the field of air purification. Background technique [0002] Formaldehyde is widely used in building materials and household products. Due to the non-standard product testing process and its inherent formaldehyde volatilization characteristics, these materials will i...

Claims

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Application Information

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IPC IPC(8): B01J23/889B01J35/10B01D53/86B01D53/72
CPCB01D53/8668B01J23/002B01J23/8892B01D2257/704B01D2258/06B01J2523/00B01J35/60B01J35/61B01J2523/12B01J2523/72B01J2523/842B01J2523/13B01J2523/23
Inventor 李伟吴伟关庆鑫
Owner NANKAI UNIV
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