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Adsorption catalyst for in-situ degradation of formaldehyde

A catalyst and formaldehyde technology, applied in the direction of organic compound/hydride/coordination complex catalysts, physical/chemical process catalysts, other chemical processes, etc., can solve the problem of low formaldehyde conversion efficiency, low formaldehyde conversion rate, and volatile catalysts Live and other issues

Inactive Publication Date: 2018-11-13
ANHUI LEJIN ENVIRONMENT TECH CO LTD
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  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

Catalytic oxidation technology mainly utilizes the oxygen in the air to decompose formaldehyde into carbon dioxide and water under the action of a catalyst. It does not require an external excitation light source and the product is clean. A cerium-doped nano-titanium dioxide / activated carbon for air purification disclosed in CN102658115A Fiber composite photocatalyst and preparation method thereof, CN102247842A discloses a high-efficiency catalyst for eliminating formaldehyde at room temperature, which can efficiently decompose low-concentration formaldehyde under normal temperature and humidity, but the photocatalyst has low conversion efficiency to formaldehyde and the catalyst is easily deactivated
[0004] To sum up, the existing formaldehyde degradation agents either use adsorption method or catalytic degradation method, so that indoor formaldehyde is not thorough enough, and the conversion rate of formaldehyde is low

Method used

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  • Adsorption catalyst for in-situ degradation of formaldehyde

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preparation example Construction

[0010] The present invention also provides a preparation method of the adsorption catalyst for in-situ degradation of formaldehyde, including the following steps:

[0011] (1) Add a foaming agent to the nylon 66 emulsion and mix uniformly, and then electrostatically spin to obtain nylon 66 fiber, and calcinate the nylon 66 fiber at 300 to 450°C for 2 to 4 hours to obtain porous carbon fiber;

[0012] (2) After mixing the porous carbon fiber, attapulgite, silane coupling agent and organic titanate uniformly in a solvent, ultrasonicate for 15-30 minutes, and then seal and react at 80-120℃ for 3-6 hours to obtain modified porous carbon fiber ;

[0013] (3) Disperse the modified porous carbon fiber in a solvent ultrasonically for 15 to 30 minutes, then add polydiallyl dimethyl ammonium chloride, continue ultrasonication for 30 to 45 minutes, then add graphene oxide, and stir for 30 to 45 minutes to obtain Adsorption catalyst for in-situ degradation of formaldehyde.

[0014] In the presen...

Embodiment 1

[0023] An adsorption catalyst for in-situ degradation of formaldehyde, made of the following parts by weight: 10 parts by weight of attapulgite, 8 parts by weight of tetraethyl titanate, 3.5 parts by weight of silane coupling agent KH580, and 6 parts by weight of graphene oxide Parts, 5 parts by weight of polydiallyldimethylammonium chloride, 3 parts by weight of sodium carbonate, 100 parts by weight of nylon 66 emulsion, and 50 parts by weight of water.

[0024] The preparation method of the adsorption catalyst for in-situ degradation of formaldehyde includes the following steps:

[0025] (1) Add sodium carbonate to nylon 66 emulsion and mix uniformly, and then electrospin to obtain nylon 66 fiber. The electrospinning process is: power supply voltage 50kV, spinning temperature 35°C, relative humidity 75%; multi-needle spray The distance between the needles of the silk unit is 35cm, and the number of needles of the spinning unit is 90;

[0026] Calcining nylon 66 fibers at 350°C for...

Embodiment 2

[0031] An adsorption catalyst for in-situ degradation of formaldehyde, made of the following parts by weight: 12 parts by weight of attapulgite, 10 parts by weight of tetramethyl titanate, 3.2 parts by weight of silane coupling agent KH590, and 6 parts by weight of graphene oxide Parts, 6 parts by weight of polydiallyldimethylammonium chloride, 3 parts by weight of N,N'-dinitrosopentamethylenetetramine, 120 parts by weight of nylon 66 emulsion, and 50 parts by weight of ethanol.

[0032] (1) Add N,N'-dinitrosopentamethylenetetramine into nylon 66 emulsion and mix uniformly, and then electrospin to obtain nylon 66 fiber. The electrospinning process is: power supply voltage 50kV, spinning The temperature is 35℃, the relative humidity is 75%; the distance between the needles of the multi-needle spinning unit is 35cm, and the number of needles of the spinning unit is 90;

[0033] Calcining nylon 66 fibers at 400°C for 2.5 hours to obtain porous carbon fibers;

[0034] (2) After grinding...

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Abstract

The invention relates to the technical field of formaldehyde removing agents, in particular to an adsorption catalyst for in-situ degradation of formaldehyde. The adsorption catalyst is prepared fromthe following parts by weight: 5-15 parts of attapulgite, 3 to 12 parts of organic titanate, 3 to 4 parts of a silane coupling agent, 5 to 8 parts of graphene oxide, 3 to 8 parts of polydiallyl dimethyl ammonium chloride, 1 to 5 parts of a foaming agent, 80 to 150 parts of a nylon 66 emulsion, and 10 to 50 parts of a solvent. The adsorption catalyst in the invention can adsorb and catalytically degrade indoor formaldehyde, and can remove indoor formaldehyde in a long-lasting and thorough manner.

Description

Technical field [0001] The invention relates to the technical field of formaldehyde purifiers, in particular to an adsorption catalyst for in-situ degradation of formaldehyde. Background technique [0002] Formaldehyde is one of the main pollutants in volatile organic pollutants (VOCs), especially in indoor environments. The harm of formaldehyde to the human body depends on its concentration. It irritates the ocular mucosa at low concentrations, irritates the upper respiratory tract when the concentration is higher, and causes cough, chest tightness, headache and nausea. When the concentration is higher, it causes rhinitis, pharyngitis, emphysema, and lung cancer. even death. At present, it has been identified as a carcinogen and teratogenic substance by the World Health Organization. The health problems caused by indoor environmental pollution caused by formaldehyde have increasingly become a new hot spot of public attention. [0003] At present, indoor formaldehyde decompositio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/12B01J20/20B01J20/22B01J21/18B01J31/38B01D53/86
CPCB01J20/12B01D53/8668B01J20/20B01J20/22B01J20/223B01J21/18B01J31/38
Inventor 郭常青吴学军
Owner ANHUI LEJIN ENVIRONMENT TECH CO LTD
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