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Catalyst for low-temperature catalytic oxidation of formaldehyde and preparation method thereof

A low-temperature catalysis and catalyst technology, applied in the chemical industry, can solve the problems of poor catalysis effect and increase catalyst, and achieve the effects of high catalytic activity and stability, promoting oxidation activity and reducing energy consumption.

Active Publication Date: 2021-07-20
SHANGHAI INST OF TECH
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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 exactly to solve above-mentioned deficiency and provide a kind of catalyst that is used for the catalytic oxidation of formaldehyde at low temperature, has improved the adsorption and activation capacity to oxygen in the catalyst effectively, has further increased the activity of catalyst, has solved the problem in the prior art. The technical problem of poor catalytic effect of the catalyst used for the low-temperature catalytic oxidation of formaldehyde

Method used

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  • Catalyst for low-temperature catalytic oxidation of formaldehyde and preparation method thereof
  • Catalyst for low-temperature catalytic oxidation of formaldehyde and preparation method thereof
  • Catalyst for low-temperature catalytic oxidation of formaldehyde and preparation method thereof

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Effect test

Embodiment 1

[0023] A catalyst for low-temperature catalytic oxidation of formaldehyde, potassium ion modified cobalt ammonium complex method, that is, the cobalt component is first precipitated on the surface of activated carbon by the deposition precipitation method, and then the potassium ion-containing ammonia solution is used to form a complex with the precipitate, Further drying treatment in the system. Convert the feeding amount of cobalt nitrate, potassium nitrate, activated carbon and ammonia water into cobalt, potassium, carbon and nitrogen atoms respectively, and the contents of each component are as follows:

[0024]

[0025] The preparation method of above-mentioned catalyst specifically comprises the steps:

[0026] 1) Add 140mL of 1mol / L Co(NO 3 ) 2 Add the solution and 170mL of 1mol / L sodium carbonate solution drop by drop to the beaker containing the suspension of 1.7g of activated carbon and 20mL of water, and control the amount of each drop of co-flow to 0.05-0.07ml...

Embodiment 2

[0029] A catalyst for low-temperature catalytic oxidation of formaldehyde, potassium ion modified cobalt ammonium complex method, that is, the cobalt component is first precipitated on the surface of activated carbon by the deposition precipitation method, and then the potassium ion-containing ammonia solution is used to form a complex with the precipitate, Further drying treatment in the system. Convert the feeding amount of cobalt nitrate, potassium nitrate, activated carbon and ammonia water into cobalt, potassium, carbon and nitrogen atoms respectively, and the contents of each component are as follows:

[0030]

[0031] The preparation method of above-mentioned catalyst specifically comprises the steps:

[0032] 1) Add 120mL of 1mol / L Co(NO 3 ) 2 Add the solution and 145mL of 1mol / L sodium carbonate solution drop by drop to the beaker containing the suspension of 2.9g of activated carbon and 20mL of water, and control the amount of each drop of co-flow to 0.05-0.07ml...

Embodiment 3

[0035] A catalyst for low-temperature catalytic oxidation of formaldehyde, potassium ion modified cobalt ammonium complex method, that is, the cobalt component is first precipitated on the surface of activated carbon by the deposition precipitation method, and then the potassium ion-containing ammonia solution is used to form a complex with the precipitate, Further drying treatment in the system. Convert the feeding amount of cobalt nitrate, potassium nitrate, activated carbon and ammonia water into cobalt, potassium, carbon and nitrogen atoms respectively, and the contents of each component are as follows:

[0036]

[0037] The preparation method of above-mentioned catalyst specifically comprises the steps:

[0038] 1) Add 120mL of 1mol / L Co(NO 3 ) 2 Add the solution and 145mL of 1mol / L sodium carbonate solution drop by drop to the beaker containing the suspension of 2.9g of activated carbon and 20mL of water, and control the amount of each drop of co-flow to 0.05-0.07ml...

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Abstract

The invention relates to a catalyst for low-temperature catalytic oxidation of formaldehyde and a preparation method thereof. The catalyst consists of cobalt ammonium complexes, activated carbon and K 2 O composition, in the preparation process of this catalyst, the feeding amount of cobalt nitrate, potassium nitrate, activated carbon and ammonia water is respectively converted into cobalt, potassium, carbon and nitrogen atom, and the molar percentage of Co is 12.3~33%, and the molar percentage of K is 1.0 to 2.9%, the molar percentage of C is 33 to 49.4%, and the molar percentage of N is 24.7 to 49.1%. The aqueous ammonia solution of ions forms a complex with cobalt ions, and is further dried to obtain the final product; the present invention effectively improves the adsorption and activation capacity of oxygen in the catalyst, further increases the activity of the catalyst, and solves the problem of catalyst catalysis in the prior art. Technical issues that don't work well.

Description

[technical field] [0001] The invention belongs to the field of chemical industry, in particular to a catalyst for low-temperature catalytic oxidation of formaldehyde and a preparation method thereof. [Background technique] [0002] As we all know, due to the popularity of interior decoration materials and the popularity of artificial wood boards, formaldehyde in building materials slowly volatilizes and lasts for decades, posing a potential threat to human health. Therefore, how to effectively remove formaldehyde from indoor air , has been receiving much attention. Generally, porous materials such as activated carbon, diatomaceous earth, etc. are often used to adsorb formaldehyde. However, due to the limited capacity of the material and the existence of adsorption and desorption balance, the adsorption efficiency is not high, the amount of adsorbent is large, and desorption causes secondary pollution. And other issues. [0003] Since the end of last century, a lot of work ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/25B01D53/86B01D53/72
CPCB01D53/8668B01D2257/708B01J27/25
Inventor 吴贵升徐会佳黄思毛东森
Owner SHANGHAI INST OF TECH
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